DANB CDA – GC: Chairside Dentistry — All Questions

Which matrix system is most commonly used for Class II amalgam restorations?

Tofflemire matrix band and retainer

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Mylar strip

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Sectional matrix with ring

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AutoMatrix without retainer

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A patient is scheduled for a Class III composite restoration on tooth #8. Which of the following should the dental assistant prepare for the matrix?

A clear Mylar strip

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A Tofflemire matrix band

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A sectional metal matrix

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A copper band

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During a Class II composite restoration, the dentist notices the composite is not curing properly at the gingival floor of the proximal box. Which factor is most likely responsible?

The curing light is too far from the gingival margin

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The acid etchant was applied for an insufficient time

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The composite shade selected was too dark for the cavity preparation

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The bonding agent was not light cured separately before composite placement

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What is the purpose of placing a wedge when using a matrix band for a Class II restoration?

To create a tight contact between the restoration and the adjacent tooth

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To prevent the tooth from moving during the procedure

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To hold the rubber dam in place

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To protect the gingival tissue from the bur

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Which type of dental prosthesis replaces all teeth in one arch?

Complete denture

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Partial denture

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Fixed bridge

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Implant-supported crown

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A patient returns for the cementation of a porcelain-fused-to-metal (PFM) crown. Which cement would the dental assistant most likely prepare?

Resin-modified glass ionomer cement

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Zinc oxide eugenol cement

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Calcium hydroxide base

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Zinc phosphate cement

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When assisting with a crown preparation, what is the correct sequence for taking a final impression?

Retract gingival tissue, dry the preparation, syringe light-body material around the prep, seat the tray with heavy-body material

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Seat the tray first, then syringe light-body around the prep

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Apply heavy-body material directly to the preparation without retraction

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Place retraction cord after the impression material has been dispensed

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What instrument is used to measure the length of a root canal during endodontic treatment?

Endodontic file with a rubber stop and an electronic apex locator

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Periodontal probe

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Explorer

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Spoon excavator

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During a root canal procedure, the dentist asks for irrigation. Which solution should the dental assistant have ready?

Sodium hypochlorite (NaOCl)

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Hydrogen peroxide 30%

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Chlorhexidine mouthwash only

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Sterile distilled water only

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What material is most commonly used to obturate (fill) a root canal after cleaning and shaping?

Gutta-percha

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Composite resin

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Amalgam

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Glass ionomer cement

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Which instrument is used to measure periodontal pocket depth?

Periodontal probe

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Explorer

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Curette

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Scaler

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A patient presents with red, swollen, bleeding gingiva and probing depths of 2 to 3 mm. The dental assistant documents these findings. What is the most likely periodontal classification?

Gingivitis

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Moderate periodontitis

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Advanced periodontitis

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Healthy periodontium

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What is the primary purpose of a periodontal dressing after surgical treatment?

To protect the surgical site during healing

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To deliver antibiotics directly to the surgical site

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To apply pressure that stops all postoperative bleeding

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To serve as a permanent restoration over the surgical area

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Which forceps are used for the extraction of maxillary anterior teeth?

Universal forceps (No. 150)

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Cowhorn forceps (No. 16)

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Mandibular molar forceps (No. 17)

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Root tip picks

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After a surgical extraction, the patient is given post-operative instructions. Which instruction is appropriate for the dental assistant to reinforce?

Bite on gauze for 30 to 45 minutes and avoid using a straw for 24 hours

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Rinse vigorously with warm salt water immediately after surgery

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Consume hot liquids within the first hour

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Resume brushing at the extraction site the same day

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A patient calls the office 3 days after an extraction complaining of severe throbbing pain, a bad taste, and an empty-looking socket. Which post-surgical complication should the dental assistant suspect?

Alveolar osteitis (dry socket)

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Normal post-operative healing

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Surgical site infection requiring antibiotics

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Fractured root tip remaining in the socket

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What is the purpose of a separator (spacer) placed between teeth before orthodontic banding?

To create space between teeth so that orthodontic bands can be placed

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To clean the interproximal surfaces

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To hold the archwire in position

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To remove excess bonding material

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A patient with fixed orthodontic appliances reports a broken bracket on a premolar. What should the dental assistant prepare for the appointment?

Bonding materials, bracket, and bracket placement instruments

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Impression materials for a new appliance

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Extraction forceps

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Periodontal probe and scaler

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Which plier is used to cut an orthodontic archwire?

Distal end cutter

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Howe plier

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Weingart utility plier

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Bird-beak plier

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At what age do the first primary teeth typically begin to erupt?

6 months

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3 months

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12 months

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18 months

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A 4-year-old child is anxious and refuses to sit in the dental chair. Which behavior management technique is most appropriate for the dental assistant to use?

Tell-show-do technique

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Distraction using a toy or video without explaining the procedure

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Having the parent leave the room immediately to reduce the child's reliance on them

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Delaying the appointment until the child is older and more cooperative

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How many primary teeth are in a complete primary dentition?

20

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24

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28

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32

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Which intraoral radiograph is best for evaluating the periapical region of a specific tooth?

Periapical radiograph

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Bitewing radiograph

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Occlusal radiograph

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Panoramic radiograph

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The dentist requests a radiograph to check for interproximal caries on the posterior teeth. Which type of radiograph should the dental assistant prepare to expose?

Bitewing radiograph

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Periapical radiograph

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Occlusal radiograph

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Lateral cephalometric radiograph

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What size film or sensor is typically used for periapical radiographs on adult posterior teeth?

Size 2

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Size 0

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Size 1

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Size 4

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Which hand instrument is used to detect caries, calculus, and other irregularities on tooth surfaces?

Explorer

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Mouth mirror

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Cotton pliers

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Spoon excavator

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What is the function of a spoon excavator in restorative dentistry?

To remove soft, decayed dentin from the tooth

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To smooth the walls of a cavity preparation

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To place composite material into the preparation

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To etch the enamel surface

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The dentist asks for an instrument to carve the occlusal anatomy of a freshly placed amalgam restoration. Which instrument should the dental assistant transfer?

Discoid-cleoid carver

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Hollenback carver

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Tofflemire retainer

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Articulating paper holder

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In four-handed dentistry, where is the dental assistant typically positioned relative to the patient?

At the 2 o'clock to 4 o'clock position (for a right-handed operator)

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Directly behind the patient's head

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At the 9 o'clock position

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Standing on the same side as the operator

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During a procedure, the dentist signals for an instrument transfer. Using the single-handed transfer technique, in which hand does the dental assistant hold the instrument to be delivered?

The hand closest to the patient (left hand for a right-handed operator setup)

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The dominant hand regardless of operator position

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Both hands simultaneously

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Either hand, as there is no standard

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What is the transfer zone in four-handed dentistry?

The area near the patient's chin where instruments are exchanged between the operator and assistant

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The front desk area where patient records are exchanged

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The sterilization area where instruments are processed

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The storage area where instrument cassettes are kept

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In the Universal Numbering System, which tooth is the maxillary right third molar?

Tooth #1

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Tooth #16

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Tooth #17

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Tooth #32

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During a clinical examination, the dentist calls out ‘MOD composite on tooth #30.’ What surfaces are involved?

Mesial, occlusal, and distal

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Mesial, occlusal, and facial

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Mesial, occlusal, and lingual

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Occlusal, distal, and facial

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What color is traditionally used to chart existing restorations on a dental chart?

Blue or black

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Red

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Green

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Yellow

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What is the primary purpose of using a dental dam during a restorative procedure?

To isolate the tooth and provide a dry field for the procedure

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To protect the patient from the overhead light

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To hold the patient's mouth open

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To replace the need for high-volume evacuation

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When placing a dental dam for a Class II restoration on tooth #19, which tooth should the most distal clamp be placed on?

Tooth #19 or one tooth distal to it

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Tooth #14

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The most anterior tooth in the arch

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Any maxillary tooth

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Which instrument is used to punch holes in the dental dam material?

Ainsworth dental dam punch

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Dental dam forceps

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Hemostat

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Cotton pliers

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Which impression material is classified as irreversible hydrocolloid?

Alginate

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Agar

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Polyvinyl siloxane

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Polysulfide

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After taking an alginate impression, the dental assistant notices the impression has a grainy, chalky texture and tore when removed from the mouth. What is the most likely cause?

The material was over-mixed or the water-to-powder ratio was incorrect

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The tray was removed too slowly from the mouth

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The impression was left in the mouth too long after setting

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The tray was not loaded with enough alginate material

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Which type of gypsum product is most commonly used to pour a diagnostic study model?

Type III dental stone

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Type IV die stone

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Type V high-strength die stone

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Type I impression plaster

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What is the purpose of placing a calcium hydroxide liner in a deep cavity preparation?

To stimulate secondary dentin formation and protect the pulp

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To bond the restoration to the tooth

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To fill the entire cavity preparation

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To etch the enamel surface

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The dentist has completed a crown preparation and needs to place a temporary crown. Which cement should the dental assistant prepare for temporary cementation?

Zinc oxide eugenol (ZOE) temporary cement

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Resin-modified glass ionomer permanent cement

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Composite bonding resin

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Calcium hydroxide liner

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Which dental cement releases fluoride and chemically bonds to tooth structure?

Glass ionomer cement

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Zinc phosphate cement

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Zinc oxide eugenol cement

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Resin cement without glass ionomer

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What is the correct order of instruments on a basic examination tray setup?

Mouth mirror, explorer, cotton pliers (from left to right in order of use)

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Explorer, cotton pliers, mouth mirror

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Cotton pliers, mouth mirror, explorer

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Periodontal probe, scaler, curette

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After a procedure, the dental assistant begins breaking down the operatory. What should be done with the contaminated instruments first?

Transport them to the sterilization area in a covered container or cassette

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Rinse them at the operatory sink and leave them to air dry

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Place them directly into the ultrasonic cleaner without transport

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Store them in the cabinet until the end of the day

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Which of the following items is typically included on an amalgam restorative tray setup but NOT on a composite restorative tray setup?

Amalgam carrier and condenser

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Mouth mirror and explorer

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Cotton rolls

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High-volume evacuator tip

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A Safety Data Sheet (SDS) is required for all hazardous chemicals in a workplace under OSHA regulations. Which section of the SDS provides information about recommended firefighting measures and suitable extinguishing media?

Section 5

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Section 2

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Section 8

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Section 11

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CHEMTREC (Chemical Transportation Emergency Center) provides what type of assistance to emergency responders at a hazardous materials incident?

24-hour telephone guidance on chemical hazards, product identification, and initial response recommendations

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On-site decontamination teams deployed within 30 minutes of notification

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Legal authorization for EMS to administer antidotes at hazmat incidents

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Mandatory incident command structure assignments for all responding agencies

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At a hazmat incident, the incident commander informs EMS that the atmosphere contains a known chemical with an identified concentration. The hazmat team determines an air-purifying respirator (APR) with appropriate cartridges will provide adequate respiratory protection. What level of PPE does this describe?

Level C

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Level A

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Level B

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Level D

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A paramedic crew responds to a mass casualty incident at a subway station where multiple patients present with cherry-red skin coloration, altered mental status, headache, and seizures. After ensuring scene safety and decontamination, which antidote should be administered?

Hydroxocobalamin (Cyanokit)

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Atropine sulfate auto-injector

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Diazepam for seizure control only

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N-acetylcysteine IV infusion

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Multiple patients from an office building present with sudden onset of fever, nonproductive cough, widened mediastinum on hospital imaging, and hemorrhagic pleural effusions. Public health officials suspect a biological agent attack. Which biological agent is most consistent with this presentation?

Bacillus anthracis (inhalational anthrax)

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Yersinia pestis (pneumonic plague)

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Variola major (smallpox)

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Clostridium botulinum (botulism)

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Which items are typically included on an impression tray setup for a final impression?

Impression trays of various sizes, impression material with dispensing gun, and adhesive for the tray

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Extraction forceps, elevators, and hemostatic gauze

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Endodontic files, irrigation syringe, and gutta percha

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Curing light, bonding agent, and acid etch

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A patient in the dental chair begins experiencing symptoms of an allergic reaction, and the dentist calls for the emergency kit. Where should the dental assistant locate the emergency tray or kit?

In a designated, easily accessible location that is the same in every operatory and known to all staff members

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Locked in the dentist's private office to prevent unauthorized access by patients

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In the sterilization area alongside the autoclaved instrument cassettes

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In the trunk of the dentist's vehicle for portability between office locations

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An anesthetic tray setup for the dentist to administer local anesthesia should include which of the following?

Anesthetic carpules, aspirating syringe, and appropriate gauge needles

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Prophy angle, polishing paste, and floss

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Alginate, impression trays, and mixing spatula

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Surgical burs, bone file, and suture material

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A dental assistant reviews the day’s schedule and sees back-to-back appointments: a composite restoration at 9:00 AM, an extraction at 9:45 AM, and a prophylaxis at 10:30 AM. To maximize efficiency, how should the assistant plan tray setups?

Pre-set each procedure-specific tray in advance, covered or stored in the designated area, so that turnover between patients requires only barrier changes and tray swaps

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Set up one universal tray with instruments for all three procedures to avoid changing trays between patients

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Set up only the first tray and gather instruments for the next procedure while the dentist begins working

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Wait until each patient is seated to begin assembling the tray so the instruments stay sterile longer

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After dismissing a patient from a restorative procedure, the dental assistant removes the used tray from the treatment area. What should be done with the contaminated instruments on the tray?

Transport them in a covered, puncture-resistant container to the sterilization area for processing

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Rinse them under running water at the chairside sink and return them to the instrument drawer

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Spray them with surface disinfectant and place them back on the tray for reuse

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Wrap them in the patient's bib and carry them by hand to the break room sink

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When organizing instruments on a procedure tray, what is the standard arrangement principle?

Instruments are arranged in the order they will be used during the procedure, from left to right

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Instruments are arranged alphabetically by name for quick identification

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The largest instruments are placed on the left and the smallest on the right

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Instruments are grouped by the metal they are made of, such as stainless steel versus carbon steel

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The dentist asks the dental assistant to set up for an amalgam restoration on tooth #3. In addition to the basic setup, which procedure-specific instruments should be on the tray?

Amalgam carrier, condenser, carver, and burnisher

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Composite placement instrument, curing light, and etch syringe

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Periosteal elevator, extraction forceps, and suture needle

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Endodontic files, paper points, and lentulo spiral

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During cleanup after a surgical extraction, the dental assistant finds a used suture needle on the tray, blood-soaked gauze in the patient’s lap, and an empty anesthetic carpule on the bracket tray. How should each item be disposed of?

Suture needle in the sharps container, blood-soaked gauze in the biohazard waste bag, and empty anesthetic carpule in the sharps container

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Suture needle in the biohazard bag, blood-soaked gauze in regular trash, and empty carpule in regular trash

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Suture needle in regular trash, blood-soaked gauze in the sharps container, and empty carpule in the biohazard bag

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Suture needle in the sharps container, blood-soaked gauze in regular trash, and empty carpule in the biohazard bag

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After removing contaminated barriers from the dental chair, light handles, and air/water syringe at the end of a procedure, what should the dental assistant do before placing new barriers?

Clean and disinfect all surfaces where barriers were placed using the spray-wipe-spray technique with an EPA-registered disinfectant

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Simply place new barriers directly over the existing surfaces without additional cleaning

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Wipe the surfaces with a dry paper towel to remove visible debris

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Rinse the surfaces with plain water and allow them to air dry

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A dental procedure has just been completed, and the dentist indicates the patient is ready to be dismissed. Which of the following should the dental assistant do before escorting the patient from the operatory?

Review post-operative instructions with the patient, return the chair to an upright position, and remove the patient napkin

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Begin breaking down the tray and sterilizing instruments while the patient is still seated

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Ask the patient to remove their own protective eyewear and napkin before standing

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Start disinfecting the operatory surfaces while giving the patient verbal discharge instructions

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How many teeth are in the complete primary (deciduous) dentition?

20

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24

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28

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32

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At approximately what age do the first primary teeth typically begin to erupt?

6 months

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3 months

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12 months

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18 months

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What term describes the natural process by which primary teeth are shed to make way for permanent teeth?

Exfoliation

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Eruption

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Impaction

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Ankylosis

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A dental assistant is preparing materials for a sealant application on a 7 year old patient’s newly erupted first permanent molars. Which surface of the tooth is the sealant placed on?

The occlusal surface, specifically in the pits and fissures

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The buccal smooth surface of the tooth

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The interproximal contact area between adjacent teeth

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The cervical area near the gumline

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Which type of fluoride application involves painting a concentrated fluoride product directly onto the tooth surfaces of a pediatric patient?

Fluoride varnish

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Fluoride rinse

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Fluoridated toothpaste

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Systemic fluoride supplement

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A pediatric patient requires a full coverage restoration on a severely decayed primary molar. Which type of restoration is most commonly used for this purpose?

Stainless steel crown

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Porcelain veneer

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Composite resin veneer

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Cast gold crown

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What is a pulpotomy?

Removal of the coronal portion of the pulp while preserving the vital radicular pulp in a primary tooth

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Complete removal of all pulp tissue from the root canals of a permanent tooth

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Surgical removal of the root tip and surrounding infected tissue

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Placement of a temporary filling material over an exposed dentin surface

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A 5 year old patient has lost a primary second molar prematurely due to extensive decay. The dentist recommends placing a device to prevent drifting of adjacent teeth. What is this device called?

Space maintainer

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Palatal expander

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Orthodontic retainer

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Hawley appliance

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During a pediatric dental procedure, the dentist plans to use nitrous oxide sedation. Which of the following is the dental assistant’s responsibility during nitrous oxide administration?

Monitoring the patient's responsiveness and comfort level throughout the procedure

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Determining the appropriate percentage of nitrous oxide for the patient

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Diagnosing the patient's anxiety level and deciding if sedation is necessary

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Administering local anesthesia before the nitrous oxide takes effect

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A dental assistant notices unexplained bruising on a pediatric patient’s arms and face during a routine appointment. The bruises appear to be at different stages of healing. What is the dental assistant’s legal obligation?

Report the suspected abuse to the appropriate authorities, as dental professionals are mandated reporters

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Document the findings in the chart but take no further action

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Ask the child's parent directly if they are responsible for the injuries

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Wait to see if more bruises appear at the next appointment before taking action

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What characterizes the mixed dentition stage in a child’s dental development?

Both primary and permanent teeth are present in the mouth simultaneously

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All primary teeth have been replaced by permanent teeth

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Only primary teeth are present with no permanent teeth erupted

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Supernumerary teeth are present alongside the normal dentition

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What are natal teeth?

Teeth that are present in the mouth at the time of birth

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Teeth that erupt during the first 30 days after birth

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Primary teeth that fail to exfoliate by age 14

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Permanent teeth that erupt in an ectopic position

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A parent asks the dental assistant for advice about their toddler’s persistent thumb sucking habit. Which response is most appropriate?

Explain that prolonged thumb sucking beyond age 4 may affect dental development and recommend discussing it with the dentist

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Tell the parent that thumb sucking has no effect on the teeth at any age

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Recommend immediately placing an orthodontic appliance to stop the habit

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Advise the parent to apply a bitter substance to the child's thumb without consulting the dentist

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Tongue thrust is an oral habit that involves which of the following?

Pushing the tongue forward against or between the anterior teeth during swallowing

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Grinding the teeth together during sleep

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Biting the lower lip habitually throughout the day

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Breathing through the mouth instead of the nose

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Early childhood caries (ECC) is most commonly associated with which of the following practices?

Prolonged use of a bottle containing sweetened liquids, especially at bedtime

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Introducing solid foods at six months of age

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Using a fluoride toothpaste after age two

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Having the child's first dental visit by age one

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A parent brings a 2 year old child to the dental office with extensive decay on the maxillary anterior teeth. The decay pattern shows dark, cavitated lesions on the labial surfaces of the upper incisors. This presentation is most consistent with which condition?

Baby bottle tooth decay from prolonged bottle feeding with sugary liquids

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Fluorosis caused by excessive fluoride intake during tooth development

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Amelogenesis imperfecta, a genetic enamel formation defect

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Traumatic injury to the anterior teeth from a fall

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An 8 year old patient presents with a primary canine that has not exfoliated, and a radiograph shows the permanent canine developing in an ectopic position. The dental assistant is reviewing the chart before the dentist enters. Which observation from the mixed dentition is most relevant for the dentist to address?

The retained primary canine may be impeding eruption of the permanent successor and may require extraction

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The primary canine should be left in place indefinitely because it has a healthy root

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The permanent canine will correct its position on its own without intervention

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The patient should immediately be referred for full orthodontic braces

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When assisting with a fluoride treatment for a pediatric patient, the dental assistant should take which precaution to minimize the risk of fluoride ingestion?

Use suction throughout the application and have the patient lean forward and spit after treatment

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Apply the fluoride only to the mandibular teeth to reduce the amount used

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Have the patient swallow any excess fluoride since the amount is too small to be harmful

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Skip the fluoride treatment if the patient is under age 10

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Neonatal teeth are defined as teeth that erupt during which time period?

Within the first 30 days after birth

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Before the child is born

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Between 3 and 6 months of age

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Between 6 and 12 months of age

Correct Incorrect Correct answer

The dental assistant is preparing the tray for a sealant procedure on a pediatric patient. Which step must occur immediately before the sealant material is applied to the tooth?

The tooth surface is etched with phosphoric acid, rinsed, and dried completely

Correct Incorrect Correct answer

A local anesthetic is administered to numb the tooth

Correct Incorrect Correct answer

A temporary filling is placed in the pit and fissure area

Correct Incorrect Correct answer

The tooth is prepared with a high speed handpiece to create retention

Correct Incorrect Correct answer

What is the purpose of a film holder or sensor holder such as the XCP or Rinn device in intraoral radiography?

To position the film or sensor parallel to the long axis of the tooth and stabilize it during exposure

Correct Incorrect Correct answer

To increase the speed of image processing in a digital system

Correct Incorrect Correct answer

To shield the patient's thyroid gland from radiation exposure

Correct Incorrect Correct answer

To measure the amount of radiation the patient receives during the exposure

Correct Incorrect Correct answer

When placing a digital sensor for a periapical radiograph of the mandibular premolars, the dental assistant notices the patient is having difficulty tolerating the sensor due to its rigid size. Which of the following is the best course of action?

Adjust the sensor position slightly and reassure the patient while ensuring proper placement for a diagnostic image

Correct Incorrect Correct answer

Replace the digital sensor with a larger sensor to capture more anatomy

Correct Incorrect Correct answer

Take the radiograph without a holder by having the patient hold the sensor with their finger

Correct Incorrect Correct answer

Skip the radiograph entirely and inform the dentist that the patient cannot tolerate it

Correct Incorrect Correct answer

The XCP instrument system includes three color coded components. Which component directs the position indicator device (PID) to the correct angulation?

The aiming ring (indicator ring)

Correct Incorrect Correct answer

The bite block (bite piece)

Correct Incorrect Correct answer

The sensor or film

Correct Incorrect Correct answer

The lead apron

Correct Incorrect Correct answer

A dental assistant is using a Rinn holder to take a periapical radiograph of tooth #14. After placing the sensor in the holder and positioning it in the patient’s mouth, the assistant aligns the PID with the aiming ring. Which radiographic technique is being used?

Paralleling technique

Correct Incorrect Correct answer

Bisecting angle technique

Correct Incorrect Correct answer

Occlusal technique

Correct Incorrect Correct answer

Panoramic technique

Correct Incorrect Correct answer

In the Palmer notation system, how are the four quadrants of the mouth identified?

By a right-angle bracket symbol indicating the quadrant

Correct Incorrect Correct answer

By Roman numerals I through IV

Correct Incorrect Correct answer

By letters A through D

Correct Incorrect Correct answer

By color coding each quadrant on the chart

Correct Incorrect Correct answer

In the FDI (Federation Dentaire Internationale) numbering system, what does the first digit of a two-digit tooth number represent?

The quadrant

Correct Incorrect Correct answer

The tooth type

Correct Incorrect Correct answer

The surface involved

Correct Incorrect Correct answer

The patient's age group

Correct Incorrect Correct answer

During a dental examination, the dentist instructs the dental assistant to chart a missing tooth #19. Which charting symbol is used to indicate a missing tooth?

An X drawn through the tooth on the chart

Correct Incorrect Correct answer

A circle drawn around the tooth number

Correct Incorrect Correct answer

A red dot placed on the occlusal surface

Correct Incorrect Correct answer

A horizontal line drawn above the tooth

Correct Incorrect Correct answer

How is an impacted tooth typically indicated on an anatomic dental chart?

By drawing the tooth below the occlusal line with a circle around it

Correct Incorrect Correct answer

By shading the entire tooth in red

Correct Incorrect Correct answer

By drawing a horizontal arrow through the tooth

Correct Incorrect Correct answer

By placing a triangle symbol above the root

Correct Incorrect Correct answer

The dentist notes that tooth #14 has drifted mesially into the space left by a previously extracted tooth #13. How should this be charted?

Draw an arrow on the chart indicating the direction of tooth movement

Correct Incorrect Correct answer

Shade the tooth in blue to show it has moved

Correct Incorrect Correct answer

Mark the tooth with a circle to indicate mobility

Correct Incorrect Correct answer

Cross out the tooth to show it is no longer in normal position

Correct Incorrect Correct answer

How is a rotated tooth indicated on a dental chart?

By drawing a curved arrow around the tooth to show the direction of rotation

Correct Incorrect Correct answer

By drawing an X through the tooth

Correct Incorrect Correct answer

By coloring the tooth outline in green

Correct Incorrect Correct answer

By placing a square around the tooth number

Correct Incorrect Correct answer

During charting, the dentist identifies caries on the occlusal surface of tooth #30. How should the dental assistant record this finding?

Outline the affected area on the occlusal surface in red

Correct Incorrect Correct answer

Shade the entire tooth in blue

Correct Incorrect Correct answer

Draw an X through tooth #30

Correct Incorrect Correct answer

Place a checkmark next to the tooth number

Correct Incorrect Correct answer

What charting symbol indicates a tooth fracture?

A zigzag line or jagged line drawn across the fractured area

Correct Incorrect Correct answer

A solid dot on the affected surface

Correct Incorrect Correct answer

A dashed circle around the tooth

Correct Incorrect Correct answer

A horizontal line through the crown

Correct Incorrect Correct answer

How is a periapical abscess indicated on a dental chart?

A small circle or radiolucency symbol drawn at the apex of the tooth root

Correct Incorrect Correct answer

A red line drawn across the crown

Correct Incorrect Correct answer

An X drawn through the entire tooth

Correct Incorrect Correct answer

A wavy line along the gingival margin

Correct Incorrect Correct answer

What is the difference between anatomic and geometric dental charting?

Anatomic charting shows teeth with realistic crown and root shapes, while geometric charting uses simplified circles and lines

Correct Incorrect Correct answer

Anatomic charting uses color coding and geometric charting does not

Correct Incorrect Correct answer

Geometric charting includes root structures but anatomic charting does not

Correct Incorrect Correct answer

Anatomic charting is only used for primary teeth and geometric for permanent teeth

Correct Incorrect Correct answer

A new patient arrives and reports pain in the upper right area. The dental assistant should record this information in which section of the dental record?

Chief complaint

Correct Incorrect Correct answer

Treatment plan

Correct Incorrect Correct answer

Progress notes

Correct Incorrect Correct answer

Periodontal chart

Correct Incorrect Correct answer

How many teeth are included in each quadrant of the permanent dentition?

8 teeth

Correct Incorrect Correct answer

6 teeth

Correct Incorrect Correct answer

7 teeth

Correct Incorrect Correct answer

10 teeth

Correct Incorrect Correct answer

How many sextants are used to divide the dental arches for periodontal charting?

6 sextants

Correct Incorrect Correct answer

4 sextants

Correct Incorrect Correct answer

8 sextants

Correct Incorrect Correct answer

3 sextants

Correct Incorrect Correct answer

In dental terminology, which teeth are classified as anterior teeth?

Incisors and canines

Correct Incorrect Correct answer

Premolars and molars

Correct Incorrect Correct answer

Canines and premolars

Correct Incorrect Correct answer

Only the central incisors

Correct Incorrect Correct answer

The dentist dictates treatment needs during a clinical examination. The dental assistant charts planned restorations in red and existing restorations in blue. A tooth has both an existing DO amalgam and a new occlusal carie. How should this tooth appear on the chart?

The DO surfaces outlined in blue for the existing amalgam and the occlusal carie area outlined in red for needed treatment

Correct Incorrect Correct answer

The entire tooth shaded in red because treatment is needed

Correct Incorrect Correct answer

The entire tooth shaded in blue because a restoration already exists

Correct Incorrect Correct answer

The tooth marked with an X because it requires extraction

Correct Incorrect Correct answer

A dental assistant reviews a patient’s chart and notices that tooth #3 is marked with an X, tooth #4 has an arrow pointing mesially, and tooth #5 has a red outline on the occlusal surface. What clinical situation do these symbols collectively describe?

Tooth #3 is missing, tooth #4 has drifted mesially toward the space, and tooth #5 has occlusal caries requiring treatment

Correct Incorrect Correct answer

All three teeth need extraction

Correct Incorrect Correct answer

Tooth #3 has a fracture, tooth #4 is impacted, and tooth #5 has an existing restoration

Correct Incorrect Correct answer

Tooth #3 has been restored, tooth #4 is rotated, and tooth #5 needs a crown

Correct Incorrect Correct answer

When using the FDI numbering system, a patient’s mandibular left first molar in the permanent dentition is identified as which number?

36

Correct Incorrect Correct answer

46

Correct Incorrect Correct answer

16

Correct Incorrect Correct answer

26

Correct Incorrect Correct answer

In the Palmer notation system, what number range is used for permanent teeth in each quadrant?

1 through 8

Correct Incorrect Correct answer

1 through 16

Correct Incorrect Correct answer

1 through 10

Correct Incorrect Correct answer

1 through 32

Correct Incorrect Correct answer

A dental assistant is preparing a patient’s chart for a consultation with an oral surgeon. The chart must clearly communicate the status of all teeth including existing restorations, missing teeth, and pathology. Which charting format would provide the most detailed visual representation?

Anatomic charting

Correct Incorrect Correct answer

Geometric charting

Correct Incorrect Correct answer

A written narrative description only

Correct Incorrect Correct answer

A simple tooth number list

Correct Incorrect Correct answer

The dentist examines a patient and identifies periapical pathology at the apex of tooth #8. The dental assistant should chart this finding using which method?

Draw a small circle at the root apex of tooth #8 in red

Correct Incorrect Correct answer

Shade the entire crown of tooth #8 in blue

Correct Incorrect Correct answer

Draw an X through tooth #8

Correct Incorrect Correct answer

Place a diagonal line across the root of tooth #8

Correct Incorrect Correct answer

A dental assistant is entering charting data into practice management software. The dentist calls out ‘existing three-unit bridge, teeth 3 through 5, with pontic at 4.’ How should this be recorded on the dental chart?

Chart abutment crowns on teeth #3 and #5 in blue with a pontic symbol replacing tooth #4, connected by lines representing the bridge

Correct Incorrect Correct answer

Draw an X through teeth #3, #4, and #5 to show they are covered

Correct Incorrect Correct answer

Shade all three teeth in red to indicate planned treatment

Correct Incorrect Correct answer

Circle teeth #3 through #5 and label them as a partial denture

Correct Incorrect Correct answer

What is the purpose of a shade guide in restorative and prosthetic dentistry?

To match the color of the restoration or prosthesis to the patient's natural teeth

Correct Incorrect Correct answer

To determine the correct occlusal height of the restoration

Correct Incorrect Correct answer

To measure the dimensions of the prepared tooth

Correct Incorrect Correct answer

To evaluate the patient's periodontal health before treatment

Correct Incorrect Correct answer

In a fixed bridge, what is the term for the artificial tooth that replaces the missing tooth?

Pontic

Correct Incorrect Correct answer

Abutment

Correct Incorrect Correct answer

Retainer

Correct Incorrect Correct answer

Framework

Correct Incorrect Correct answer

What is the function of the abutment teeth in a fixed bridge?

They serve as supporting teeth to which the bridge is cemented

Correct Incorrect Correct answer

They are the artificial teeth that fill the edentulous space

Correct Incorrect Correct answer

They are temporary teeth placed during the healing period

Correct Incorrect Correct answer

They provide retention for a removable partial denture clasp

Correct Incorrect Correct answer

A patient needs a temporary crown on a prepared tooth while the permanent crown is being fabricated by the laboratory. Which material is commonly used to fabricate a chairside provisional restoration?

Bis-acryl composite resin

Correct Incorrect Correct answer

Zinc phosphate cement

Correct Incorrect Correct answer

Glass ionomer restorative material

Correct Incorrect Correct answer

Polyvinyl siloxane impression material

Correct Incorrect Correct answer

What is the purpose of a bite registration in prosthodontic procedures?

To record the relationship of the maxillary and mandibular arches in occlusion

Correct Incorrect Correct answer

To determine the shade of the final restoration

Correct Incorrect Correct answer

To create a working model of the individual arch

Correct Incorrect Correct answer

To measure the patient's vertical dimension at rest

Correct Incorrect Correct answer

When the dentist is preparing teeth for a removable partial denture framework, what role does the dental assistant play in the impression process?

Select and try in the appropriate stock tray, mix and load the impression material, and assist with tray placement

Correct Incorrect Correct answer

Take the final impression independently while the dentist leaves the operatory

Correct Incorrect Correct answer

Design the framework on the diagnostic cast before sending it to the laboratory

Correct Incorrect Correct answer

Determine which teeth need preparation for rest seat placement

Correct Incorrect Correct answer

What is the purpose of a facebow transfer in prosthodontic treatment?

To record the relationship of the maxillary arch to the temporomandibular joints for accurate articulator mounting

Correct Incorrect Correct answer

To measure the width of the patient's dental arch for tray selection

Correct Incorrect Correct answer

To record the shade of the patient's anterior teeth

Correct Incorrect Correct answer

To evaluate the range of motion of the mandible during chewing

Correct Incorrect Correct answer

During a try-in appointment for a removable partial denture, the patient reports that the framework feels tight and uncomfortable when seated. What should the dental assistant communicate to the dentist?

The framework may need adjustment to improve the fit before proceeding

Correct Incorrect Correct answer

The patient should wear the partial for a week to allow the tissues to adapt

Correct Incorrect Correct answer

The framework should be sent back to the laboratory for a complete remake

Correct Incorrect Correct answer

The dental assistant should adjust the framework chairside with a laboratory handpiece

Correct Incorrect Correct answer

What is the difference between relining and rebasing a removable denture?

Relining adds new material to the tissue surface only, while rebasing replaces the entire denture base

Correct Incorrect Correct answer

Relining replaces the denture teeth, while rebasing reshapes the base

Correct Incorrect Correct answer

Relining is a permanent laboratory procedure, while rebasing is always done chairside

Correct Incorrect Correct answer

Relining changes the occlusion, while rebasing maintains the original bite

Correct Incorrect Correct answer

A patient presents with a porcelain veneer that has debonded from the facial surface of tooth #8. The veneer is intact and the patient wants it rebonded. What should the dental assistant prepare for this procedure?

Etching agent, bonding resin, and resin cement for veneer recementation

Correct Incorrect Correct answer

Zinc oxide-eugenol temporary cement and a cotton roll for isolation

Correct Incorrect Correct answer

Amalgam carrier, condenser, and carver for a new restoration

Correct Incorrect Correct answer

Alginate impression material and a stock tray for a new veneer impression

Correct Incorrect Correct answer

Which component of a removable partial denture provides retention by engaging undercuts on the abutment teeth?

Clasps

Correct Incorrect Correct answer

Connectors

Correct Incorrect Correct answer

Denture base

Correct Incorrect Correct answer

Rest seats

Correct Incorrect Correct answer

A patient returns to have a permanent crown cemented. Before cementation, the dentist asks the dental assistant to try the crown on the prepared tooth. The crown does not seat fully. What is the most appropriate next step?

Notify the dentist that the crown is not fully seating so adjustments can be evaluated

Correct Incorrect Correct answer

Force the crown into place using firm finger pressure and cement it immediately

Correct Incorrect Correct answer

Use a high-speed handpiece to adjust the internal surface of the crown

Correct Incorrect Correct answer

Take a new impression because the crown clearly needs to be remade

Correct Incorrect Correct answer

What is the primary purpose of an articulator in prosthodontic laboratory procedures?

To simulate the movements of the mandible for accurate prosthesis fabrication

Correct Incorrect Correct answer

To hold the impression tray steady during impression taking

Correct Incorrect Correct answer

To measure the patient's interocclusal distance

Correct Incorrect Correct answer

To trim and polish the prosthesis after fabrication

Correct Incorrect Correct answer

A patient with an implant-supported prosthesis reports that the crown on the implant feels loose. The dental assistant reviews the chart and notes that the crown is screw-retained. What action should the dental assistant take?

Inform the dentist and prepare the appropriate screwdriver and torque wrench for the implant system

Correct Incorrect Correct answer

Apply temporary cement to reseat the crown and schedule a follow-up visit

Correct Incorrect Correct answer

Remove the crown independently and retighten the screw to the proper torque

Correct Incorrect Correct answer

Advise the patient that looseness is normal for implant-supported crowns

Correct Incorrect Correct answer

Which type of temporary cement is commonly used to seat a provisional crown?

Zinc oxide non-eugenol temporary cement

Correct Incorrect Correct answer

Resin-modified glass ionomer permanent cement

Correct Incorrect Correct answer

Zinc phosphate permanent cement

Correct Incorrect Correct answer

Calcium hydroxide liner

Correct Incorrect Correct answer

The dentist asks the dental assistant to repair a fractured denture tooth chairside. Which material is typically used for this type of repair?

Cold-cure (autopolymerizing) acrylic resin

Correct Incorrect Correct answer

Composite resin flowable material

Correct Incorrect Correct answer

Zinc oxide-eugenol impression paste

Correct Incorrect Correct answer

Polyether impression material

Correct Incorrect Correct answer

What does the retainer component of a fixed bridge refer to?

The crown portion that fits over the abutment tooth and anchors the bridge

Correct Incorrect Correct answer

The artificial tooth that replaces the missing tooth in the span

Correct Incorrect Correct answer

The metal framework that connects the pontic to the abutments

Correct Incorrect Correct answer

The temporary restoration placed while the bridge is being fabricated

Correct Incorrect Correct answer

A patient wearing a complete maxillary denture complains that the denture has become loose over the past year. The dentist determines that the alveolar ridge has resorbed. Which procedure would most effectively restore the fit of the existing denture?

A laboratory reline to add new acrylic material to the tissue surface

Correct Incorrect Correct answer

Applying denture adhesive cream as a long-term solution

Correct Incorrect Correct answer

Placing a soft tissue conditioner and dismissing the patient with no follow-up

Correct Incorrect Correct answer

Adjusting the occlusion only without modifying the intaglio surface

Correct Incorrect Correct answer

In implant prosthodontics, what is the function of the implant abutment?

It connects the implant body to the prosthetic crown or prosthesis

Correct Incorrect Correct answer

It is the titanium screw embedded surgically in the jawbone

Correct Incorrect Correct answer

It is the temporary healing cap placed after implant surgery

Correct Incorrect Correct answer

It is the impression coping used to capture the implant position

Correct Incorrect Correct answer

In four-handed dentistry, what is the two-handed transfer technique?

The assistant retrieves the used instrument with one hand while simultaneously delivering the new instrument with the other hand

Correct Incorrect Correct answer

The dentist uses both hands to grasp and transfer an instrument to the assistant

Correct Incorrect Correct answer

The assistant holds two instruments in one hand for the dentist to choose from

Correct Incorrect Correct answer

The dentist and assistant each use one hand to pass a single instrument between them

Correct Incorrect Correct answer

In four-handed dentistry, which method is used for transferring a mirror or explorer between the assistant and the operator?

Single-handed transfer at the transfer zone

Correct Incorrect Correct answer

Two-handed transfer behind the patient's head

Correct Incorrect Correct answer

Placing the instrument on the tray for the operator to pick up

Correct Incorrect Correct answer

Passing the instrument over the patient's face

Correct Incorrect Correct answer

In the dental operatory clock concept, where is the static zone located?

Directly behind the patient's head, between the operator and assistant zones

Correct Incorrect Correct answer

Directly in front of the patient at the foot of the dental chair

Correct Incorrect Correct answer

To the right of the operator where instruments are stored

Correct Incorrect Correct answer

Above the patient where the operatory light is mounted

Correct Incorrect Correct answer

The dentist asks for the surgical forceps during an extraction procedure. Which instrument grasp should the dental assistant use to deliver this instrument to the dentist?

Palm grasp, delivering the handle end so the dentist can receive it in a palm grasp

Correct Incorrect Correct answer

Modified pen grasp, delivering the working end toward the dentist

Correct Incorrect Correct answer

Pen grasp, placing the instrument on the bracket tray for the dentist to pick up

Correct Incorrect Correct answer

Thumb-to-nose grasp, holding the instrument by its beaks

Correct Incorrect Correct answer

Which instrument grasp involves holding the instrument in the palm with all four fingers wrapped around the handle and the thumb providing stabilization?

Palm grasp

Correct Incorrect Correct answer

Pen grasp

Correct Incorrect Correct answer

Modified pen grasp

Correct Incorrect Correct answer

Thumb-to-nose grasp

Correct Incorrect Correct answer

What is the function of the dental dam frame?

To stretch and hold the dam material away from the patient's face

Correct Incorrect Correct answer

To punch holes in the dam material at the correct locations

Correct Incorrect Correct answer

To hold the dam clamp onto the anchor tooth

Correct Incorrect Correct answer

To invert the dam material around the teeth

Correct Incorrect Correct answer

What is the difference between a winged dental dam clamp and a wingless clamp?

A winged clamp has projections that allow the dam to be attached to the clamp before placement on the tooth

Correct Incorrect Correct answer

A winged clamp is used only on anterior teeth while a wingless clamp is for posterior teeth

Correct Incorrect Correct answer

A wingless clamp has a wider jaw opening than a winged clamp

Correct Incorrect Correct answer

A winged clamp does not require dam forceps for placement

Correct Incorrect Correct answer

Which tooth is referred to as the anchor tooth when placing a dental dam?

The tooth located one or two teeth distal to the last tooth being treated

Correct Incorrect Correct answer

The tooth directly mesial to the first tooth being treated

Correct Incorrect Correct answer

The tooth on the opposite arch from the treatment area

Correct Incorrect Correct answer

The most anterior tooth visible in the patient's smile

Correct Incorrect Correct answer

Which hole size on the dental dam punch is referred to as the key hole?

The largest hole size, used for the anchor tooth and clamp

Correct Incorrect Correct answer

The smallest hole size, used for mandibular incisors

Correct Incorrect Correct answer

The medium hole size, used for premolars

Correct Incorrect Correct answer

The hole size that matches the diameter of the dam forceps

Correct Incorrect Correct answer

A dental assistant is preparing a dental dam template for a Class II restoration on tooth #14. How should the template be used?

Place the template over the dam material and mark the hole positions corresponding to the teeth to be isolated

Correct Incorrect Correct answer

Place the template directly on the patient's face to locate the correct arch position

Correct Incorrect Correct answer

Use the template to determine which clamp size fits the anchor tooth

Correct Incorrect Correct answer

Fold the template in half to identify the center of the dam material

Correct Incorrect Correct answer

After placing the dental dam, the assistant notices that the dam material has not tucked into the gingival sulcus around the treated tooth. What should the assistant do?

Use a plastic instrument or spoon excavator to invert the dam into the sulcus

Correct Incorrect Correct answer

Remove the entire dam and start over with a new sheet

Correct Incorrect Correct answer

Apply a bonding agent to seal the dam edge against the tooth

Correct Incorrect Correct answer

Leave the dam as placed since inversion is optional

Correct Incorrect Correct answer

What is the purpose of applying a water-soluble lubricant to the underside of the dental dam before placement?

To make it easier to slide the dam over the teeth and through the contacts

Correct Incorrect Correct answer

To disinfect the dam material before it contacts the oral tissues

Correct Incorrect Correct answer

To prevent the dam material from sticking to the dental clamp

Correct Incorrect Correct answer

To make the dam material more visible under the operatory light

Correct Incorrect Correct answer

What is the septum of a dental dam?

The portion of dam material that passes between adjacent teeth

Correct Incorrect Correct answer

The hole punched for the anchor tooth clamp

Correct Incorrect Correct answer

The outer border of the dam that attaches to the frame

Correct Incorrect Correct answer

The ligature material used to stabilize the dam

Correct Incorrect Correct answer

A dental assistant needs to stabilize the dental dam on the anterior teeth opposite the clamp. Which material is commonly used as a ligature to secure the dam on these teeth?

Dental floss or a small piece of rubber dam material

Correct Incorrect Correct answer

Orthodontic wire ligature tied around the tooth

Correct Incorrect Correct answer

A strip of matrix band wedged into the contact

Correct Incorrect Correct answer

Cotton pellets placed over each punched hole

Correct Incorrect Correct answer

What is the function of a dental dam napkin?

To absorb moisture and increase patient comfort between the dam and the skin

Correct Incorrect Correct answer

To replace the dental dam frame during short procedures

Correct Incorrect Correct answer

To act as a disinfectant barrier between the dam and the oral mucosa

Correct Incorrect Correct answer

To help invert the dam material into the gingival sulcus

Correct Incorrect Correct answer

A patient is having a composite restoration on tooth #30, and the dentist does not want to use a dental dam. Which alternative isolation method should the dental assistant prepare?

Cotton rolls and a high-volume evacuator for moisture control

Correct Incorrect Correct answer

A saliva ejector alone with no additional isolation aids

Correct Incorrect Correct answer

Gauze squares placed directly over the tongue and buccal mucosa

Correct Incorrect Correct answer

A bite block placed on the contralateral side with no suction

Correct Incorrect Correct answer

What is a Dri-Angle used for during a dental procedure?

To block the parotid (Stensen's) duct and absorb moisture in the buccal vestibule

Correct Incorrect Correct answer

To measure the angle of the dental dam clamp on the tooth

Correct Incorrect Correct answer

To hold the dental dam frame at the correct position on the patient's face

Correct Incorrect Correct answer

To prop the patient's mouth open during radiographic exposure

Correct Incorrect Correct answer

During a lengthy endodontic procedure, the dentist asks the assistant to place a throat pack. What is the primary reason for using a throat pack?

To prevent debris and irrigating solutions from entering the patient's throat

Correct Incorrect Correct answer

To stabilize the dental dam clamp on the anchor tooth

Correct Incorrect Correct answer

To provide additional retraction of the tongue during the procedure

Correct Incorrect Correct answer

To reduce the gag reflex by applying pressure to the soft palate

Correct Incorrect Correct answer

A dental assistant is isolating teeth #3 through #5 with a dental dam. The dam is properly punched and the clamp is placed on tooth #3. After seating the dam, the assistant notices moisture leaking around tooth #5. Which action is most appropriate?

Place a ligature or additional stabilizing cord around tooth #5 and ensure the dam is inverted at that location

Correct Incorrect Correct answer

Remove the dam and restart with a larger clamp on tooth #5

Correct Incorrect Correct answer

Apply cavity varnish to the dam material around tooth #5 to seal the leak

Correct Incorrect Correct answer

Ignore the leak because some moisture is expected during dam isolation

Correct Incorrect Correct answer

A patient reports a latex allergy before a restorative procedure requiring dental dam isolation. Which modification should the dental assistant make?

Use a non-latex (nitrile) dental dam material instead of the standard latex dam

Correct Incorrect Correct answer

Proceed with the latex dam after applying a topical antihistamine to the patient's face

Correct Incorrect Correct answer

Skip the dental dam entirely and perform the restoration without any isolation

Correct Incorrect Correct answer

Place the latex dam over a layer of petroleum jelly to prevent skin contact

Correct Incorrect Correct answer

Where should the dental dam clamp be tested before being placed in the patient’s mouth?

On the tooth of interest using a study model or by checking stability on the actual tooth before releasing the forceps

Correct Incorrect Correct answer

On the dental assistant's fingertip to verify jaw tension

Correct Incorrect Correct answer

On a cotton roll to confirm the clamp opens and closes properly

Correct Incorrect Correct answer

On the patient's lower lip to assess comfort before tooth placement

Correct Incorrect Correct answer

A dental assistant is using a dry angle pad and cotton rolls to isolate a mandibular molar during a sealant application. Where should the cotton rolls be placed?

One cotton roll in the buccal vestibule and one in the lingual vestibule adjacent to the tooth

Correct Incorrect Correct answer

One cotton roll on the occlusal surface of the tooth being treated

Correct Incorrect Correct answer

Two cotton rolls stacked in the buccal vestibule only

Correct Incorrect Correct answer

One cotton roll under the tongue at the midline of the floor of the mouth

Correct Incorrect Correct answer

Which factors should a dental assistant consider when selecting the thickness (gauge) of rubber dam material for a procedure?

The type of procedure and the amount of tissue retraction needed

Correct Incorrect Correct answer

The color preference of the dentist and the patient's age

Correct Incorrect Correct answer

The size of the dental dam frame being used

Correct Incorrect Correct answer

The type of sterilizer available in the office

Correct Incorrect Correct answer

Which hand instrument has a pointed working end and paired cutting edges, and is used to remove supragingival calculus?

Scaler

Correct Incorrect Correct answer

Curette

Correct Incorrect Correct answer

Explorer

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

Which hand instrument has a rounded toe, a single cutting edge, and is primarily designed for subgingival scaling and root planing?

Curette

Correct Incorrect Correct answer

Scaler

Correct Incorrect Correct answer

Hoe

Correct Incorrect Correct answer

Chisel

Correct Incorrect Correct answer

Which restorative hand instrument has a flat blade with a cutting edge on one side and is used with a pulling motion to plane the walls of a cavity preparation?

Hatchet

Correct Incorrect Correct answer

Hoe

Correct Incorrect Correct answer

Chisel

Correct Incorrect Correct answer

Gingival margin trimmer

Correct Incorrect Correct answer

Which hand instrument has a straight blade with a cutting edge perpendicular to the handle and is used with a pushing motion to refine cavity preparation walls?

Chisel

Correct Incorrect Correct answer

Hatchet

Correct Incorrect Correct answer

Hoe

Correct Incorrect Correct answer

Cleoid-discoid

Correct Incorrect Correct answer

Which hand instrument has a blade set at an angle and a cutting edge on one side, and is used with a pulling motion to smooth and shape the floor of a cavity preparation?

Hoe

Correct Incorrect Correct answer

Hatchet

Correct Incorrect Correct answer

Chisel

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

The dentist is placing an amalgam restoration and asks the dental assistant for an instrument to remove excess material from the gingival margin of the preparation. Which instrument should the assistant pass?

Gingival margin trimmer

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

Condenser

Correct Incorrect Correct answer

Cement spatula

Correct Incorrect Correct answer

After placing an amalgam restoration, the dentist needs to smooth the surface of the restoration and adapt the margins. Which instrument should the dental assistant transfer?

Burnisher

Correct Incorrect Correct answer

Condenser

Correct Incorrect Correct answer

Hatchet

Correct Incorrect Correct answer

Explorer

Correct Incorrect Correct answer

What is the primary function of a condenser (plugger) in restorative dentistry?

To pack and compress amalgam into the cavity preparation

Correct Incorrect Correct answer

To smooth and polish the final restoration

Correct Incorrect Correct answer

To remove decayed tooth structure from the preparation

Correct Incorrect Correct answer

To etch the enamel surface before bonding

Correct Incorrect Correct answer

Which double-ended carving instrument has a claw-shaped end and a disc-shaped end, and is used to carve anatomy in amalgam restorations?

Cleoid-discoid

Correct Incorrect Correct answer

Hollenback carver

Correct Incorrect Correct answer

Ward carver

Correct Incorrect Correct answer

Interproximal carver

Correct Incorrect Correct answer

Which instrument is a stiff, flat-bladed hand instrument used to mix dental cements on a glass slab or paper pad?

Cement spatula

Correct Incorrect Correct answer

Composite placement instrument

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

Hoe

Correct Incorrect Correct answer

What is a dappen dish used for in dental procedures?

To hold small amounts of dental materials during a procedure

Correct Incorrect Correct answer

To mix impression material before loading a tray

Correct Incorrect Correct answer

To sterilize small instruments in chemical solution

Correct Incorrect Correct answer

To collect saliva during isolation procedures

Correct Incorrect Correct answer

What is the purpose of a mixing pad in chairside dentistry?

To provide a disposable surface for mixing cements, bases, and liners

Correct Incorrect Correct answer

To cushion instruments during sterilization

Correct Incorrect Correct answer

To absorb excess moisture from the oral cavity

Correct Incorrect Correct answer

To record the patient's treatment codes

Correct Incorrect Correct answer

The dentist has etched and bonded a cavity preparation and is ready to place composite resin. Which instrument should the dental assistant have ready for the dentist to carry and place the composite material?

Composite placement instrument

Correct Incorrect Correct answer

Amalgam condenser

Correct Incorrect Correct answer

Cement spatula

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

During a Class II amalgam restoration, the dentist needs to establish a temporary wall to replace the missing proximal surface. Which device should the dental assistant have ready?

Matrix retainer (Tofflemire retainer) with matrix band

Correct Incorrect Correct answer

Dental dam clamp and frame

Correct Incorrect Correct answer

Articulating paper holder

Correct Incorrect Correct answer

Cotton roll holder

Correct Incorrect Correct answer

Which type of rotary bur has a smooth cutting surface with bonded abrasive particles and is primarily used for finishing and contouring restorations and tooth structure?

Diamond bur

Correct Incorrect Correct answer

Carbide bur

Correct Incorrect Correct answer

Steel bur

Correct Incorrect Correct answer

Finishing disk

Correct Incorrect Correct answer

Which type of rotary bur has bladed flutes machined into the head and is commonly used for cutting cavity preparations and removing old restorations?

Carbide bur

Correct Incorrect Correct answer

Diamond bur

Correct Incorrect Correct answer

White stone

Correct Incorrect Correct answer

Rubber polishing point

Correct Incorrect Correct answer

A dental assistant is setting up a tray for a composite restoration. The dentist requests a bur for initial tooth preparation to remove decay. Which bur type is most appropriate?

Carbide bur in a high-speed handpiece

Correct Incorrect Correct answer

Diamond bur in a slow-speed handpiece

Correct Incorrect Correct answer

Rubber polishing point in a high-speed handpiece

Correct Incorrect Correct answer

White stone in a slow-speed handpiece

Correct Incorrect Correct answer

A dental assistant is organizing instruments for an amalgam restoration tray setup. In the correct order of use, which sequence reflects the typical progression during the procedure?

Carbide bur, hatchet, condenser, burnisher, cleoid-discoid

Correct Incorrect Correct answer

Burnisher, condenser, hatchet, carbide bur, cleoid-discoid

Correct Incorrect Correct answer

Cleoid-discoid, hatchet, condenser, burnisher, carbide bur

Correct Incorrect Correct answer

Condenser, carbide bur, burnisher, hatchet, cleoid-discoid

Correct Incorrect Correct answer

Which instrument is used to loosen a tooth from the periodontal ligament before forceps extraction?

Elevator

Correct Incorrect Correct answer

Curette

Correct Incorrect Correct answer

Rongeur

Correct Incorrect Correct answer

Hemostat

Correct Incorrect Correct answer

A simple extraction involves the removal of a tooth that is:

Fully erupted and visible in the oral cavity

Correct Incorrect Correct answer

Partially impacted in the bone

Correct Incorrect Correct answer

Completely encased in bone

Correct Incorrect Correct answer

Fractured below the gumline

Correct Incorrect Correct answer

A patient is scheduled for the extraction of a fully impacted mandibular third molar. Which of the following will the dental assistant most likely need to prepare for this procedure?

Surgical handpiece, bur, and periosteal elevator

Correct Incorrect Correct answer

Extraction forceps and cotton rolls only

Correct Incorrect Correct answer

Composite placement instruments

Correct Incorrect Correct answer

Prophy angle and polishing paste

Correct Incorrect Correct answer

Which teeth are most commonly referred to as wisdom teeth?

Third molars

Correct Incorrect Correct answer

Second premolars

Correct Incorrect Correct answer

First molars

Correct Incorrect Correct answer

Canines

Correct Incorrect Correct answer

During a surgical extraction, the dentist asks the dental assistant to retract the tissue flap. What is the primary purpose of raising a surgical flap?

To provide direct visibility and access to the underlying bone and tooth

Correct Incorrect Correct answer

To allow placement of a dental dam

Correct Incorrect Correct answer

To reduce the need for local anesthesia

Correct Incorrect Correct answer

To eliminate the need for post-operative sutures

Correct Incorrect Correct answer

A patient has just undergone a surgical extraction that required bone removal. Which instrument would the dental assistant prepare for the dentist to smooth any sharp bony edges before closing the site?

Bone file

Correct Incorrect Correct answer

Periodontal probe

Correct Incorrect Correct answer

Spoon excavator

Correct Incorrect Correct answer

Explorer

Correct Incorrect Correct answer

Which type of suture material is absorbed by the body and does not require a separate removal appointment?

Absorbable suture (gut suture)

Correct Incorrect Correct answer

Silk suture

Correct Incorrect Correct answer

Nylon suture

Correct Incorrect Correct answer

Polyester suture

Correct Incorrect Correct answer

After an extraction, the dental assistant instructs the patient to bite firmly on a folded gauze pad placed over the extraction site. What is the primary purpose of this instruction?

To apply direct pressure and promote blood clot formation

Correct Incorrect Correct answer

To absorb saliva and keep the mouth dry

Correct Incorrect Correct answer

To prevent the tongue from touching the wound

Correct Incorrect Correct answer

To deliver medication to the extraction site

Correct Incorrect Correct answer

What is the purpose of aspiration before injecting local anesthetic solution?

To verify that the needle tip is not positioned within a blood vessel

Correct Incorrect Correct answer

To warm the anesthetic solution before injection

Correct Incorrect Correct answer

To remove air bubbles from the cartridge

Correct Incorrect Correct answer

To determine the correct injection depth

Correct Incorrect Correct answer

Which component is added to local anesthetic solutions to constrict blood vessels and prolong the anesthetic effect?

Vasoconstrictor (epinephrine)

Correct Incorrect Correct answer

Sodium fluoride

Correct Incorrect Correct answer

Calcium hydroxide

Correct Incorrect Correct answer

Hydrogen peroxide

Correct Incorrect Correct answer

The dentist removes a small piece of oral tissue and places it in a specimen container with formalin solution. The dental assistant labels the container with the patient’s name, the date, and the site of collection. What procedure is being performed?

Biopsy

Correct Incorrect Correct answer

Incision and drainage

Correct Incorrect Correct answer

Frenectomy

Correct Incorrect Correct answer

Alveoloplasty

Correct Incorrect Correct answer

A patient calls the office two hours after an extraction reporting that the gauze pad is soaked with blood and bleeding has not stopped. What should the dental assistant instruct the patient to do first?

Remove the old gauze, fold a new moistened gauze pad, place it over the site, and bite firmly for 30 minutes

Correct Incorrect Correct answer

Rinse vigorously with warm salt water

Correct Incorrect Correct answer

Apply hydrogen peroxide directly to the extraction site

Correct Incorrect Correct answer

Take two aspirin tablets for pain relief

Correct Incorrect Correct answer

Following a surgical extraction, the dental assistant provides post-operative instructions to the patient. Which recommendation is most appropriate for managing swelling during the first 24 hours?

Apply an ice pack to the outside of the face, 20 minutes on and 20 minutes off

Correct Incorrect Correct answer

Apply a warm moist towel continuously for the first 24 hours

Correct Incorrect Correct answer

Rinse the mouth with hot salt water every hour

Correct Incorrect Correct answer

Exercise vigorously to increase blood circulation to the area

Correct Incorrect Correct answer

Which instrument is used to remove granulation tissue and debris from the interior of an extraction socket?

Surgical curette

Correct Incorrect Correct answer

Periosteal elevator

Correct Incorrect Correct answer

Tissue retractor

Correct Incorrect Correct answer

Needle holder

Correct Incorrect Correct answer

A patient with a medical history indicating a prosthetic heart valve is scheduled for a surgical extraction. The dental assistant notices the patient’s chart does not indicate that antibiotic premedication was prescribed. What is the most appropriate action?

Alert the dentist before beginning the procedure so premedication can be evaluated

Correct Incorrect Correct answer

Proceed with the extraction and prescribe antibiotics afterward

Correct Incorrect Correct answer

Administer an over-the-counter pain reliever and continue

Correct Incorrect Correct answer

Inform the patient that antibiotics are not necessary for extractions

Correct Incorrect Correct answer

During a difficult extraction, the dentist informs the dental assistant that the root tip has fractured and remains in the socket. Which sequence of instruments should the dental assistant anticipate the dentist will need?

Root tip pick, small root tip elevator, and surgical curette

Correct Incorrect Correct answer

Composite placement instrument and curing light

Correct Incorrect Correct answer

High-speed handpiece and amalgam carrier

Correct Incorrect Correct answer

Prophy cup, polishing paste, and floss

Correct Incorrect Correct answer

A dental assistant is reviewing the post-operative instructions with a patient who just had an extraction. The patient asks why they should avoid using a straw for the next 24 hours. What is the correct explanation?

The suction created by using a straw can dislodge the blood clot and lead to a painful condition called dry socket

Correct Incorrect Correct answer

Straws introduce bacteria directly into the surgical site

Correct Incorrect Correct answer

Using a straw will cause the sutures to loosen prematurely

Correct Incorrect Correct answer

The plastic material in straws can cause an allergic reaction at the wound site

Correct Incorrect Correct answer

Which instrument is used to hold the suture needle during the suturing of an extraction site?

Needle holder

Correct Incorrect Correct answer

Cotton pliers

Correct Incorrect Correct answer

Hemostat

Correct Incorrect Correct answer

Tissue forceps

Correct Incorrect Correct answer

While assisting during an extraction, the dental assistant notices significant bleeding from the socket that is not controlled by gauze pressure alone. Which hemostatic agent should the dental assistant have ready to place in the socket?

Gelatin sponge (Gelfoam)

Correct Incorrect Correct answer

Zinc oxide eugenol cement

Correct Incorrect Correct answer

Calcium hydroxide paste

Correct Incorrect Correct answer

Polycarboxylate cement

Correct Incorrect Correct answer

What is the purpose of a ligature tie in orthodontic treatment?

To secure the archwire into the bracket slot

Correct Incorrect Correct answer

To bond the bracket to the tooth surface

Correct Incorrect Correct answer

To separate adjacent teeth before banding

Correct Incorrect Correct answer

To hold the lip retractor in position during treatment

Correct Incorrect Correct answer

Which type of cement is most commonly used to attach orthodontic bands to teeth?

Glass ionomer cement

Correct Incorrect Correct answer

Zinc phosphate temporary cement

Correct Incorrect Correct answer

Calcium hydroxide liner

Correct Incorrect Correct answer

Composite resin filling material

Correct Incorrect Correct answer

Which orthodontic appliance is worn after active treatment to maintain the teeth in their corrected positions?

Retainer

Correct Incorrect Correct answer

Archwire

Correct Incorrect Correct answer

Separator

Correct Incorrect Correct answer

Headgear

Correct Incorrect Correct answer

The term “malocclusion” refers to:

Any deviation from the normal alignment or relationship of the teeth

Correct Incorrect Correct answer

The absence of one or more permanent teeth

Correct Incorrect Correct answer

An infection of the periodontal ligament

Correct Incorrect Correct answer

A fracture of the mandibular condyle

Correct Incorrect Correct answer

A patient presents with the mesiobuccal cusp of the maxillary first molar occluding in the buccal groove of the mandibular first molar, and the teeth are well aligned. Which Angle classification does this represent?

Class I malocclusion

Correct Incorrect Correct answer

Class II malocclusion

Correct Incorrect Correct answer

Class III malocclusion

Correct Incorrect Correct answer

Normal occlusion with no classification

Correct Incorrect Correct answer

In Angle’s classification system, Class II malocclusion is characterized by which molar relationship?

The mandibular first molar is positioned distal (posterior) to its normal relationship with the maxillary first molar

Correct Incorrect Correct answer

The mandibular first molar is positioned mesial (anterior) to its normal relationship

Correct Incorrect Correct answer

The mesiobuccal cusp of the maxillary first molar aligns with the buccal groove of the mandibular first molar

Correct Incorrect Correct answer

The mandibular incisors protrude anterior to the maxillary incisors

Correct Incorrect Correct answer

A patient’s orthodontic records indicate a Class III malocclusion. When the dental assistant observes the patient’s profile, which facial characteristic is most consistent with this classification?

A prominent, forward-positioned mandible relative to the maxilla

Correct Incorrect Correct answer

A recessed mandible with a convex facial profile

Correct Incorrect Correct answer

Symmetrical midline alignment of both arches

Correct Incorrect Correct answer

Excessive vertical overlap of the maxillary anterior teeth

Correct Incorrect Correct answer

What does the term “overbite” describe in orthodontic assessment?

The vertical overlap of the maxillary anterior teeth over the mandibular anterior teeth

Correct Incorrect Correct answer

The horizontal distance between the maxillary and mandibular incisors

Correct Incorrect Correct answer

The lateral shift of the mandible during opening

Correct Incorrect Correct answer

The distance between the first molars when measured from buccal to lingual

Correct Incorrect Correct answer

Overjet is measured as the:

Horizontal distance between the labial surface of the mandibular incisors and the incisal edge of the maxillary incisors

Correct Incorrect Correct answer

Vertical distance that the upper teeth overlap the lower teeth

Correct Incorrect Correct answer

Width of the dental arch at the first premolars

Correct Incorrect Correct answer

Distance from the incisal edge to the cementoenamel junction

Correct Incorrect Correct answer

During an orthodontic assessment, the dental assistant notes that several of the patient’s posterior teeth on the right side have the buccal cusps of the maxillary teeth occluding lingual to the buccal cusps of the mandibular teeth. This finding is consistent with:

Posterior crossbite

Correct Incorrect Correct answer

Open bite

Correct Incorrect Correct answer

Excessive overjet

Correct Incorrect Correct answer

Class I malocclusion with crowding

Correct Incorrect Correct answer

An open bite is characterized by:

A lack of vertical overlap between the anterior teeth when the posterior teeth are in occlusion

Correct Incorrect Correct answer

Excessive vertical overlap of the maxillary incisors over the mandibular incisors

Correct Incorrect Correct answer

A horizontal gap between the upper and lower first molars

Correct Incorrect Correct answer

The mandibular arch being wider than the maxillary arch

Correct Incorrect Correct answer

The orthodontist is ready to bond brackets to a patient’s teeth. Which step does the dental assistant perform to prepare the enamel surface immediately before bracket placement?

Apply etchant (phosphoric acid) to the enamel surface for the prescribed time and rinse thoroughly

Correct Incorrect Correct answer

Place a temporary filling material on each tooth

Correct Incorrect Correct answer

Apply fluoride varnish to strengthen the enamel

Correct Incorrect Correct answer

Polish each tooth with a fluoride-containing prophy paste

Correct Incorrect Correct answer

A patient is returning to have their orthodontic brackets removed. Which instrument does the dental assistant anticipate the orthodontist will use to debond the brackets from the teeth?

Bracket-removing pliers

Correct Incorrect Correct answer

Extraction forceps

Correct Incorrect Correct answer

Howe pliers

Correct Incorrect Correct answer

Surgical rongeur

Correct Incorrect Correct answer

Which orthodontic pliers are used to form loops and bends in archwires?

Bird beak pliers

Correct Incorrect Correct answer

Cotton pliers

Correct Incorrect Correct answer

Hemostats

Correct Incorrect Correct answer

Tissue forceps

Correct Incorrect Correct answer

An orthodontic patient who is 8 years old is being fitted with an extraoral appliance that attaches to the molars and applies a posteriorly directed force to the maxilla. Which appliance is being described?

Headgear (cervical-pull or high-pull)

Correct Incorrect Correct answer

Hawley retainer

Correct Incorrect Correct answer

Clear aligner tray

Correct Incorrect Correct answer

Lingual arch wire

Correct Incorrect Correct answer

A rapid palatal expander (RPE) is used to treat which condition?

A narrow maxillary arch (transverse maxillary deficiency)

Correct Incorrect Correct answer

An anteriorly positioned mandible

Correct Incorrect Correct answer

Excessive overbite of the anterior teeth

Correct Incorrect Correct answer

Spacing between the mandibular incisors

Correct Incorrect Correct answer

A patient asks the dental assistant about an alternative to traditional metal braces. The orthodontist has recommended a series of custom, removable clear plastic trays that gradually move the teeth. Which appliance is being described?

Clear aligners (such as Invisalign)

Correct Incorrect Correct answer

Fixed lingual braces

Correct Incorrect Correct answer

Removable Hawley retainer

Correct Incorrect Correct answer

Palatal expander

Correct Incorrect Correct answer

An orthodontic patient complains of irritation on the inside of their cheek from a protruding bracket. What should the dental assistant provide to the patient for temporary relief?

Orthodontic wax to place over the bracket

Correct Incorrect Correct answer

A prescription for oral antibiotics

Correct Incorrect Correct answer

An over-the-counter whitening strip

Correct Incorrect Correct answer

A fluoride rinse to apply directly to the bracket

Correct Incorrect Correct answer

A dental assistant is reviewing the orthodontic setup tray before a wire change appointment. The tray includes Weingart utility pliers, distal end cutting pliers, ligature ties, and a scaler. Which item on the tray is least appropriate for this procedure?

Scaler

Correct Incorrect Correct answer

Weingart utility pliers

Correct Incorrect Correct answer

Distal end cutting pliers

Correct Incorrect Correct answer

Ligature ties

Correct Incorrect Correct answer

Which type of impression material is commonly known by the abbreviation PVS?

Polyvinyl siloxane

Correct Incorrect Correct answer

Polyether

Correct Incorrect Correct answer

Alginate

Correct Incorrect Correct answer

Zinc oxide eugenol

Correct Incorrect Correct answer

A dentist requests an impression material that is highly accurate and can tolerate moisture in the oral environment. Which material would be the best choice?

Polyether

Correct Incorrect Correct answer

Alginate

Correct Incorrect Correct answer

Impression compound

Correct Incorrect Correct answer

Zinc oxide eugenol paste

Correct Incorrect Correct answer

What is the primary difference between a stock impression tray and a custom impression tray?

A stock tray is prefabricated in standard sizes, while a custom tray is fabricated from a diagnostic cast to fit a specific patient

Correct Incorrect Correct answer

A stock tray is made of acrylic resin, while a custom tray is always metal

Correct Incorrect Correct answer

A stock tray is used only for final impressions, while a custom tray is used for preliminary impressions

Correct Incorrect Correct answer

A stock tray does not require adhesive, while a custom tray always requires wax spacers

Correct Incorrect Correct answer

What is the purpose of applying tray adhesive to an impression tray before loading the impression material?

To create a bond between the impression material and the tray, preventing the material from pulling away during removal

Correct Incorrect Correct answer

To speed up the setting time of the impression material

Correct Incorrect Correct answer

To act as a lubricant so the impression slides easily over the teeth

Correct Incorrect Correct answer

To increase the viscosity of the impression material for better detail

Correct Incorrect Correct answer

When loading a maxillary impression tray with alginate, where should the dental assistant begin placing the material?

In one side of the tray, then overfilling slightly and smoothing the surface

Correct Incorrect Correct answer

In the center of the tray first, then spreading outward to the edges

Correct Incorrect Correct answer

In a thin layer across the bottom of the tray only

Correct Incorrect Correct answer

On the occlusal surfaces of the teeth before placing the tray

Correct Incorrect Correct answer

When seating a mandibular alginate impression tray, the dental assistant should use which technique?

Center the tray over the teeth, seat the posterior area first, then rotate down to seat the anterior area

Correct Incorrect Correct answer

Seat the anterior area first, then push the posterior area down firmly

Correct Incorrect Correct answer

Place the tray sideways and rotate it into position once inside the mouth

Correct Incorrect Correct answer

Press the tray straight down with equal force across the entire arch simultaneously

Correct Incorrect Correct answer

Which term refers to the amount of time the dental team has to mix an impression material, load the tray, and seat it in the patient’s mouth before the material begins to set?

Working time

Correct Incorrect Correct answer

Setting time

Correct Incorrect Correct answer

Flow time

Correct Incorrect Correct answer

Curing time

Correct Incorrect Correct answer

The dentist asks the dental assistant to select an impression material with a longer setting time because the procedure involves multiple preparations. Which factor most directly affects the setting time of alginate impression material?

The temperature of the water used for mixing

Correct Incorrect Correct answer

The type of impression tray selected

Correct Incorrect Correct answer

The amount of tray adhesive applied

Correct Incorrect Correct answer

The brand of disinfectant used afterward

Correct Incorrect Correct answer

After removing an alginate impression from the patient’s mouth, what should the dental assistant do before pouring the model?

Rinse the impression under running water and spray it with an approved disinfectant

Correct Incorrect Correct answer

Immediately pour the impression without any additional steps

Correct Incorrect Correct answer

Soak the impression in glutaraldehyde for 24 hours

Correct Incorrect Correct answer

Wrap the impression in a dry paper towel and store it overnight

Correct Incorrect Correct answer

What is the purpose of a diagnostic cast in dentistry?

To provide a three-dimensional replica of the patient's teeth and surrounding tissues for treatment planning and case presentation

Correct Incorrect Correct answer

To serve as a permanent restoration for the patient's missing teeth

Correct Incorrect Correct answer

To replace the need for clinical intraoral examinations

Correct Incorrect Correct answer

To fabricate custom fluoride trays exclusively

Correct Incorrect Correct answer

Which gypsum product is most commonly used to pour diagnostic casts for dental study models?

Type III dental stone

Correct Incorrect Correct answer

Type I impression plaster

Correct Incorrect Correct answer

Type V high-strength stone

Correct Incorrect Correct answer

Type II model plaster

Correct Incorrect Correct answer

When pouring an alginate impression with dental stone, the dental assistant places the mixed stone on a vibrator. What is the primary purpose of using the vibrator during this process?

To eliminate air bubbles and ensure the stone flows into all areas of the impression

Correct Incorrect Correct answer

To speed up the setting time of the dental stone

Correct Incorrect Correct answer

To increase the expansion of the gypsum material

Correct Incorrect Correct answer

To separate the impression material from the tray

Correct Incorrect Correct answer

Which piece of laboratory equipment is used to shape and smooth the base of a dental study model to achieve a standardized geometric form?

Model trimmer

Correct Incorrect Correct answer

Dental lathe

Correct Incorrect Correct answer

Vacuum former

Correct Incorrect Correct answer

Bench press

Correct Incorrect Correct answer

When trimming a maxillary study model on a model trimmer, the dental assistant should ensure that the base of the model meets which standard?

The base should be parallel to the occlusal plane and approximately one-third of the total height of the model

Correct Incorrect Correct answer

The base should be angled at 45 degrees to the occlusal plane

Correct Incorrect Correct answer

The base should be as thin as possible to conserve dental stone

Correct Incorrect Correct answer

The base should be left rough and untrimmed for better retention in the articulator

Correct Incorrect Correct answer

What is the purpose of mounting study models on an articulator?

To simulate jaw movements and evaluate the patient's occlusal relationships

Correct Incorrect Correct answer

To permanently store the models in a humidity-controlled environment

Correct Incorrect Correct answer

To apply fluoride varnish to the model surfaces

Correct Incorrect Correct answer

To disinfect the models before sending them to the laboratory

Correct Incorrect Correct answer

A dental assistant is assisting with a crown impression and the dentist requests a two-step putty/wash technique using PVS material. The first impression with heavy-body putty has already been taken. What is the purpose of the second step using light-body wash material?

To capture fine detail of the prepared tooth and margins that the heavy-body putty alone cannot reproduce

Correct Incorrect Correct answer

To bond the putty material to the impression tray more securely

Correct Incorrect Correct answer

To disinfect the impression before sending it to the laboratory

Correct Incorrect Correct answer

To fill in undercuts so the impression can be removed without tearing

Correct Incorrect Correct answer

A dental assistant notices that a PVS impression has several large voids in the area of the prepared tooth. The tray adhesive was applied but not allowed to dry before loading the material. Which factor most likely caused this problem?

The wet adhesive prevented proper bonding, allowing the material to pull away from the tray during removal

Correct Incorrect Correct answer

The PVS material was past its expiration date

Correct Incorrect Correct answer

The impression tray was too large for the patient's arch

Correct Incorrect Correct answer

The patient's saliva chemically dissolved the PVS material

Correct Incorrect Correct answer

After taking a polyether impression, the dental assistant needs to disinfect it before sending it to the laboratory. Which precaution is most important when disinfecting polyether impressions?

Avoid prolonged immersion because polyether absorbs water and disinfectant, causing dimensional distortion

Correct Incorrect Correct answer

Polyether impressions cannot be disinfected and must be sent to the laboratory immediately

Correct Incorrect Correct answer

The impression should be soaked in alcohol for at least one hour to ensure sterility

Correct Incorrect Correct answer

Disinfection is only necessary if the patient has a known infectious disease

Correct Incorrect Correct answer

The dentist asks the dental assistant to select an impression tray for an edentulous patient who needs a complete denture impression. Which type of tray is most appropriate for the final impression?

Custom tray fabricated on a preliminary cast of the patient's arch

Correct Incorrect Correct answer

Quadrant stock tray with perforations

Correct Incorrect Correct answer

Triple tray (dual arch) bite registration tray

Correct Incorrect Correct answer

Anterior section stock tray

Correct Incorrect Correct answer

Which term describes the soft, sticky film of bacteria that accumulates on tooth surfaces and is the primary cause of periodontal disease?

Dental plaque (biofilm)

Correct Incorrect Correct answer

Calculus

Correct Incorrect Correct answer

Pellicle

Correct Incorrect Correct answer

Food debris

Correct Incorrect Correct answer

During a periodontal procedure, the dental assistant hands the dentist or hygienist instruments for scaling. What is the primary purpose of scaling?

To remove calculus and plaque deposits from the crown and root surfaces of teeth

Correct Incorrect Correct answer

To reshape the tooth enamel for cosmetic improvement

Correct Incorrect Correct answer

To apply fluoride varnish to the tooth surfaces

Correct Incorrect Correct answer

To remove carious tooth structure before placing a restoration

Correct Incorrect Correct answer

During a periodontal assessment, the dentist notes bleeding on probing at several sites and dictates the findings for the dental assistant to record. What does bleeding on probing most commonly indicate?

Inflammation of the gingival tissues, suggesting active periodontal disease

Correct Incorrect Correct answer

The patient recently consumed acidic foods that irritated the gums

Correct Incorrect Correct answer

The periodontal probe was inserted too deeply into healthy tissue

Correct Incorrect Correct answer

A blood clotting disorder requiring immediate medical referral

Correct Incorrect Correct answer

The dentist records that a molar has Class II furcation involvement. What does this finding mean?

Bone loss extends partially into the furcation area between the roots but does not pass completely through

Correct Incorrect Correct answer

The tooth has two roots that are fully fused together

Correct Incorrect Correct answer

The bone loss is limited to the coronal third of the root only

Correct Incorrect Correct answer

The tooth has complete bone support with no furcation involvement

Correct Incorrect Correct answer

A patient presents with generalized 5 to 7 mm probing depths, bleeding on probing at most sites, visible calculus deposits, and Class I mobility on several teeth. Based on these findings, which periodontal condition is the dentist most likely to diagnose?

Moderate to severe periodontitis

Correct Incorrect Correct answer

Gingivitis with no attachment loss

Correct Incorrect Correct answer

Localized aggressive periodontitis affecting only first molars

Correct Incorrect Correct answer

Normal periodontal health with physiologic probing depths

Correct Incorrect Correct answer

Root planing is performed in conjunction with scaling to accomplish which objective?

To smooth the root surface by removing residual calculus, bacterial toxins, and diseased cementum

Correct Incorrect Correct answer

To apply a sealant material to the exposed root surface

Correct Incorrect Correct answer

To reshape the root to accommodate a post and core restoration

Correct Incorrect Correct answer

To remove the pulp tissue from within the root canal

Correct Incorrect Correct answer

What is the innermost tissue of a tooth that contains nerves and blood vessels?

Pulp

Correct Incorrect Correct answer

Dentin

Correct Incorrect Correct answer

Cementum

Correct Incorrect Correct answer

Enamel

Correct Incorrect Correct answer

Which term describes inflammation of the dental pulp?

Pulpitis

Correct Incorrect Correct answer

Periodontitis

Correct Incorrect Correct answer

Gingivitis

Correct Incorrect Correct answer

Pericoronitis

Correct Incorrect Correct answer

A patient presents with a tooth that does not respond to cold testing or electric pulp testing. The dentist determines the pulp tissue is no longer vital. Which term best describes this condition?

Necrotic pulp

Correct Incorrect Correct answer

Reversible pulpitis

Correct Incorrect Correct answer

Irreversible pulpitis

Correct Incorrect Correct answer

Pulp hyperemia

Correct Incorrect Correct answer

Which endodontic instrument is used to enlarge and shape the root canal?

Reamer

Correct Incorrect Correct answer

Explorer

Correct Incorrect Correct answer

Excavator

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

What material is most commonly used to obturate (fill) the root canal after cleaning and shaping?

Gutta percha

Correct Incorrect Correct answer

Amalgam

Correct Incorrect Correct answer

Composite resin

Correct Incorrect Correct answer

Zinc oxide eugenol

Correct Incorrect Correct answer

The dental assistant is setting up for a root canal procedure. Which isolation method is required for endodontic treatment to prevent contamination and protect the patient’s airway?

Rubber dam

Correct Incorrect Correct answer

Cotton roll isolation

Correct Incorrect Correct answer

Dry angle pad

Correct Incorrect Correct answer

High-volume evacuator alone

Correct Incorrect Correct answer

What is the initial step the dentist performs to gain entry into the pulp chamber during root canal therapy?

Creating an access opening through the crown of the tooth

Correct Incorrect Correct answer

Placing a rubber dam clamp on the adjacent tooth

Correct Incorrect Correct answer

Taking a periapical radiograph of the area

Correct Incorrect Correct answer

Applying a topical anesthetic to the gingiva

Correct Incorrect Correct answer

A patient presents with a deep carious lesion on a primary molar. The dentist determines that the pulp has been exposed but the tooth is still vital. The planned treatment is to remove the coronal pulp tissue while preserving the radicular pulp. Which procedure is being described?

Pulpotomy

Correct Incorrect Correct answer

Pulpectomy

Correct Incorrect Correct answer

Pulp capping

Correct Incorrect Correct answer

Apicoectomy

Correct Incorrect Correct answer

Which endodontic procedure involves the complete removal of all pulp tissue from both the crown and root canals?

Pulpectomy

Correct Incorrect Correct answer

Pulpotomy

Correct Incorrect Correct answer

Direct pulp cap

Correct Incorrect Correct answer

Indirect pulp cap

Correct Incorrect Correct answer

A patient has completed root canal therapy on tooth #19 but continues to experience pain and swelling at the apex. A periapical radiograph reveals a persistent radiolucent area at the root tip. The dentist refers the patient for a surgical procedure to remove the root tip and surrounding infected tissue. Which procedure has been recommended?

Apicoectomy

Correct Incorrect Correct answer

Hemisection

Correct Incorrect Correct answer

Root amputation

Correct Incorrect Correct answer

Intentional replantation

Correct Incorrect Correct answer

Which diagnostic test uses a small electrical current applied to the tooth surface to assess pulp vitality?

Electric pulp test

Correct Incorrect Correct answer

Percussion test

Correct Incorrect Correct answer

Transillumination test

Correct Incorrect Correct answer

Bite test

Correct Incorrect Correct answer

The dentist asks the dental assistant to prepare for a cold test on a patient’s tooth. Which material is commonly used to perform this vitality test?

Refrigerant spray applied to a cotton pellet

Correct Incorrect Correct answer

Warm gutta percha applied to the tooth surface

Correct Incorrect Correct answer

A small amount of eugenol placed on the tooth

Correct Incorrect Correct answer

Fluoride varnish painted on the crown

Correct Incorrect Correct answer

During a deep cavity preparation, a small mechanical exposure of the pulp occurs. The pulp appears healthy with minimal bleeding. The dentist decides to place calcium hydroxide directly over the exposure site and restore the tooth. Which procedure is this?

Direct pulp cap

Correct Incorrect Correct answer

Indirect pulp cap

Correct Incorrect Correct answer

Pulpotomy

Correct Incorrect Correct answer

Pulpectomy

Correct Incorrect Correct answer

A patient reports that a tooth is extremely sensitive to heat but the pain is relieved by cold. The tooth has a history of a large restoration. Based on these symptoms, which condition is most likely present?

Irreversible pulpitis

Correct Incorrect Correct answer

Reversible pulpitis

Correct Incorrect Correct answer

Periapical abscess

Correct Incorrect Correct answer

Cracked tooth syndrome

Correct Incorrect Correct answer

Which dental cement relies on a polyacrylic acid reaction with calcium in tooth structure to achieve chemical bonding and also releases fluoride?

Glass ionomer cement

Correct Incorrect Correct answer

Zinc phosphate cement

Correct Incorrect Correct answer

Zinc oxide eugenol cement

Correct Incorrect Correct answer

Calcium hydroxide liner

Correct Incorrect Correct answer

What was the traditional purpose of applying cavity varnish to a tooth before placing an amalgam restoration?

To seal the dentinal tubules and reduce microleakage

Correct Incorrect Correct answer

To etch the enamel surface for bonding

Correct Incorrect Correct answer

To provide thermal insulation under the restoration

Correct Incorrect Correct answer

To disinfect the cavity preparation

Correct Incorrect Correct answer

A patient reports sensitivity on a recently restored tooth when drinking cold beverages. The dentist determines the tooth would benefit from a desensitizing agent. What is the primary mechanism by which desensitizers reduce sensitivity?

They occlude or seal the dentinal tubules to block fluid movement

Correct Incorrect Correct answer

They numb the pulp nerve fibers permanently

Correct Incorrect Correct answer

They add a thick layer of insulation over the dentin

Correct Incorrect Correct answer

They increase blood flow to the pulp for healing

Correct Incorrect Correct answer

The dental assistant is mixing zinc phosphate cement on a glass slab. The dentist needs the cement for luting a crown. What consistency should the mixed cement have for this purpose?

A thin, creamy consistency that forms a string approximately 1 inch long when pulled from the slab

Correct Incorrect Correct answer

A thick, putty-like consistency that can be rolled into a ball

Correct Incorrect Correct answer

A very runny consistency similar to water

Correct Incorrect Correct answer

A dry, powder-heavy mix that crumbles when touched

Correct Incorrect Correct answer

Which type of cement is used specifically to attach or bond an indirect restoration such as a crown or bridge to a prepared tooth?

Luting agent

Correct Incorrect Correct answer

Cavity liner

Correct Incorrect Correct answer

Desensitizer

Correct Incorrect Correct answer

Temporary stopping

Correct Incorrect Correct answer

Which type of dental cement sets through a chemical reaction without requiring a curing light?

Self-cure (chemical cure) cement

Correct Incorrect Correct answer

Light-cure cement

Correct Incorrect Correct answer

Dual-cure cement

Correct Incorrect Correct answer

Photopolymerized cement

Correct Incorrect Correct answer

The dentist is cementing a porcelain veneer and selects a dual-cure resin cement. Why is dual-cure preferred over a strictly light-cure cement for this application?

The chemical cure component ensures complete setting in areas where the curing light cannot fully penetrate

Correct Incorrect Correct answer

Dual-cure cements are less expensive than light-cure cements

Correct Incorrect Correct answer

Dual-cure cements provide a longer working time before any setting begins

Correct Incorrect Correct answer

Dual-cure cements do not require any light exposure at all

Correct Incorrect Correct answer

When the dental assistant is mixing a cement that requires a light-cure to set, which precaution should be taken during the mixing process?

Minimize exposure to the overhead operatory light to prevent premature setting

Correct Incorrect Correct answer

Mix the cement rapidly within 10 seconds to prevent hardening

Correct Incorrect Correct answer

Keep the cement refrigerated until immediately before use

Correct Incorrect Correct answer

Add extra liquid to slow the setting reaction

Correct Incorrect Correct answer

The dental assistant is preparing to mix zinc phosphate cement. The glass mixing slab has been cooled in the refrigerator before use. What is the rationale for using a cooled slab?

A cooled slab slows the setting reaction, allowing more powder to be incorporated for a stronger cement

Correct Incorrect Correct answer

A cooled slab prevents the cement from bonding to the glass surface

Correct Incorrect Correct answer

A cooled slab makes the cement easier to clean off the slab after use

Correct Incorrect Correct answer

A cooled slab increases the acidity of the liquid component

Correct Incorrect Correct answer

A dentist needs to cement a metal crown on a posterior tooth where access to the curing light will be limited by the metal. Which type of cement would be most appropriate?

Self-cure resin cement or zinc phosphate cement

Correct Incorrect Correct answer

Light-cure only resin cement

Correct Incorrect Correct answer

Flowable composite with bonding agent

Correct Incorrect Correct answer

Cavity varnish with temporary cement

Correct Incorrect Correct answer

What is the primary purpose of etching enamel before placing a composite restoration?

To create microscopic irregularities that allow the bonding agent to mechanically adhere to enamel

Correct Incorrect Correct answer

To sterilize the prepared tooth surface before restoration placement

Correct Incorrect Correct answer

To remove the smear layer and expose the pulp for better adhesion

Correct Incorrect Correct answer

To seal dentinal tubules and prevent postoperative sensitivity

Correct Incorrect Correct answer

A dentist requests a liner for a deep cavity preparation that is close to the pulp. Which material would the dental assistant prepare to provide thermal insulation and protect the pulp?

Calcium hydroxide

Correct Incorrect Correct answer

Zinc oxide eugenol cement used as a final restoration

Correct Incorrect Correct answer

Bonding agent applied directly over the exposed pulp

Correct Incorrect Correct answer

Petroleum jelly applied to the cavity walls

Correct Incorrect Correct answer

What is the function of a base material placed in a deep cavity preparation?

To provide thermal and mechanical protection to the pulp

Correct Incorrect Correct answer

To etch the enamel surface for bonding

Correct Incorrect Correct answer

To replace the entire dentin layer of the tooth

Correct Incorrect Correct answer

To act as the final restorative material

Correct Incorrect Correct answer

According to G.V. Black’s classification system, which class of cavity involves the incisal edge of an anterior tooth?

Class IV

Correct Incorrect Correct answer

Class I

Correct Incorrect Correct answer

Class II

Correct Incorrect Correct answer

Class III

Correct Incorrect Correct answer

A patient presents with decay on the cervical third of the facial surface of a mandibular premolar. Which G.V. Black cavity classification does this represent?

Class V

Correct Incorrect Correct answer

Class I

Correct Incorrect Correct answer

Class II

Correct Incorrect Correct answer

Class VI

Correct Incorrect Correct answer

Which restorative instrument is used to smooth and polish the surface and margins of an amalgam restoration?

Burnisher

Correct Incorrect Correct answer

Condenser

Correct Incorrect Correct answer

Carver

Correct Incorrect Correct answer

Explorer

Correct Incorrect Correct answer

During an amalgam restoration, the dentist asks the assistant to pass the instrument used to pack the amalgam into the cavity preparation. Which instrument should the assistant transfer?

Condenser

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

Carver

Correct Incorrect Correct answer

Composite placement instrument

Correct Incorrect Correct answer

After the dentist has condensed amalgam into a Class I preparation on a mandibular molar, which instrument is used to carve the occlusal anatomy and remove excess material?

Discoid/cleoid carver

Correct Incorrect Correct answer

Ball burnisher

Correct Incorrect Correct answer

Amalgam carrier

Correct Incorrect Correct answer

Hatchet

Correct Incorrect Correct answer

What is the purpose of articulating paper in restorative dentistry?

To identify high spots and premature contacts on a restoration

Correct Incorrect Correct answer

To bond composite material to the tooth surface

Correct Incorrect Correct answer

To take an impression of the prepared tooth

Correct Incorrect Correct answer

To measure the depth of the cavity preparation

Correct Incorrect Correct answer

After placing a composite restoration on tooth #30, the patient reports that the tooth feels high when biting. The dental assistant places articulating paper and the patient bites together, leaving a dark mark on the mesial marginal ridge of the restoration. What should the dentist do next?

Use a fine finishing bur to reduce the marked area on the restoration

Correct Incorrect Correct answer

Apply a new layer of composite over the high spot

Correct Incorrect Correct answer

Remove the entire restoration and start over

Correct Incorrect Correct answer

Instruct the patient that the sensation will resolve on its own

Correct Incorrect Correct answer

When polishing a composite restoration, which sequence of polishing discs should be used?

Coarse to fine grit, progressing from most abrasive to least abrasive

Correct Incorrect Correct answer

Fine to coarse grit, starting with the smoothest disc first

Correct Incorrect Correct answer

Only the finest grit disc is needed for composite polishing

Correct Incorrect Correct answer

Polishing discs are not used on composite; only rubber cups are appropriate

Correct Incorrect Correct answer

During preparation of a deep Class II cavity on a maxillary premolar, the dentist notices a small area of pinkish dentin near the pulp. The assistant should anticipate that the dentist will most likely request which material to be prepared next?

Calcium hydroxide liner to protect the near-exposure site

Correct Incorrect Correct answer

Amalgam to immediately restore the tooth

Correct Incorrect Correct answer

Impression material for a crown preparation

Correct Incorrect Correct answer

Composite etching gel for the enamel margins

Correct Incorrect Correct answer

A patient has caries in the occlusal pit of a mandibular first molar. According to G.V. Black’s classification, which class of cavity preparation will the dentist perform?

Class I

Correct Incorrect Correct answer

Class II

Correct Incorrect Correct answer

Class III

Correct Incorrect Correct answer

Class V

Correct Incorrect Correct answer

In four-handed dentistry, the operator’s zone for a right-handed dentist is located at which clock position?

7 o'clock to 12 o'clock

Correct Incorrect Correct answer

2 o'clock to 4 o'clock

Correct Incorrect Correct answer

4 o'clock to 7 o'clock

Correct Incorrect Correct answer

5 o'clock to 8 o'clock

Correct Incorrect Correct answer

What is a fulcrum in the context of dental assisting?

A finger rest used to stabilize the hand during instrument use

Correct Incorrect Correct answer

The point where the dental chair pivots during adjustment

Correct Incorrect Correct answer

The hinge mechanism on articulating forceps

Correct Incorrect Correct answer

The bracket table attachment that holds instruments

Correct Incorrect Correct answer

When assisting a right-handed dentist during a procedure on the maxillary arch, where should the dental assistant be positioned?

At the 2 o'clock to 4 o'clock position, seated 4 to 6 inches higher than the dentist

Correct Incorrect Correct answer

At the 7 o'clock to 9 o'clock position, seated at the same height as the dentist

Correct Incorrect Correct answer

At the 12 o'clock position, standing directly behind the patient

Correct Incorrect Correct answer

At the 10 o'clock to 12 o'clock position, seated lower than the dentist

Correct Incorrect Correct answer

A left-handed dentist is treating a patient. The assistant’s zone for this operator would be located at which clock position?

8 o'clock to 10 o'clock

Correct Incorrect Correct answer

2 o'clock to 4 o'clock

Correct Incorrect Correct answer

12 o'clock to 2 o'clock

Correct Incorrect Correct answer

4 o'clock to 7 o'clock

Correct Incorrect Correct answer

What is the primary purpose of the high-volume evacuator (HVE) during dental procedures?

To remove large volumes of water, saliva, blood, and debris from the oral cavity

Correct Incorrect Correct answer

To deliver air to dry the tooth surface before bonding

Correct Incorrect Correct answer

To apply fluoride varnish to the tooth surfaces

Correct Incorrect Correct answer

To retract the cheek and improve the operator's visibility

Correct Incorrect Correct answer

During a procedure on the mandibular right quadrant, where should the dental assistant position the HVE tip?

On the lingual side of the teeth being treated, close to the working area

Correct Incorrect Correct answer

On the buccal side of the opposing arch

Correct Incorrect Correct answer

Under the patient's tongue, resting on the floor of the mouth

Correct Incorrect Correct answer

Outside the mouth, pointed toward the patient's chin

Correct Incorrect Correct answer

How does the saliva ejector differ from the high-volume evacuator?

The saliva ejector provides low-volume suction for slow removal of saliva, while the HVE provides high-volume suction for rapid fluid and debris removal

Correct Incorrect Correct answer

The saliva ejector is autoclavable, while the HVE tip is disposable

Correct Incorrect Correct answer

The saliva ejector is used only during surgical procedures, while the HVE is used during all procedures

Correct Incorrect Correct answer

The saliva ejector attaches to the air-water syringe, while the HVE has its own connection

Correct Incorrect Correct answer

The dentist asks the assistant to dry the prepared tooth surface before applying the bonding agent. Which function of the air-water syringe should the assistant use?

Air only, directed at the tooth surface in short bursts

Correct Incorrect Correct answer

Water only, to rinse and simultaneously dry the surface

Correct Incorrect Correct answer

Combined air and water spray to create a mist

Correct Incorrect Correct answer

Air directed continuously at the pulp chamber for 30 seconds

Correct Incorrect Correct answer

Which instrument or device is commonly used by the dental assistant to retract the patient’s tongue during a procedure on the mandibular lingual surfaces?

Mouth mirror

Correct Incorrect Correct answer

Cotton pliers

Correct Incorrect Correct answer

Periodontal probe

Correct Incorrect Correct answer

Articulating paper holder

Correct Incorrect Correct answer

While assisting during a procedure on the maxillary right posterior teeth, the dental assistant needs to retract the patient’s cheek for better visibility. Which is the most appropriate method?

Use the mouth mirror to gently retract the buccal mucosa

Correct Incorrect Correct answer

Ask the patient to hold their cheek open with their own finger

Correct Incorrect Correct answer

Use the HVE tip to push the cheek away from the teeth

Correct Incorrect Correct answer

Place a tongue depressor between the cheek and teeth

Correct Incorrect Correct answer

During a composite procedure on the lingual surface of a mandibular anterior tooth, the assistant is using a mouth mirror for retraction. The dentist reports that light is not reflecting adequately into the work area. What should the assistant do?

Adjust the angle of the mirror to redirect light toward the operating field

Correct Incorrect Correct answer

Switch to a larger mirror size to increase light reflection

Correct Incorrect Correct answer

Remove the mirror and use the HVE tip for retraction instead

Correct Incorrect Correct answer

Ask the dentist to reposition the overhead light directly into the patient's mouth

Correct Incorrect Correct answer

During a crown preparation using a high-speed handpiece, the assistant notices water and debris are accumulating in the patient’s throat despite HVE use. What is the most likely cause of this problem?

The HVE tip is positioned too far from the operating site

Correct Incorrect Correct answer

The high-speed handpiece water flow rate is set too low

Correct Incorrect Correct answer

The patient's head is positioned too far forward

Correct Incorrect Correct answer

The saliva ejector should be used instead of the HVE

Correct Incorrect Correct answer

Which of the following describes the three primary functions of the mouth mirror during dental procedures?

Indirect vision, light reflection, and soft tissue retraction

Correct Incorrect Correct answer

Tooth measurement, caries detection, and tissue retraction

Correct Incorrect Correct answer

Direct vision, air delivery, and moisture control

Correct Incorrect Correct answer

Instrument transfer, tissue retraction, and patient communication

Correct Incorrect Correct answer

When placing a digital sensor for a periapical radiograph, the sensor should be positioned so that at least how much of the tooth structure beyond the apex is visible?

2 to 3 mm beyond the root apex

Correct Incorrect Correct answer

At the level of the root apex exactly

Correct Incorrect Correct answer

5 to 7 mm beyond the root apex

Correct Incorrect Correct answer

Only the crown and cervical third of the root need to be captured

Correct Incorrect Correct answer

A periapical radiograph of tooth #30 shows the roots appearing significantly longer than normal and the apex is not visible. Which exposure error most likely occurred?

Elongation caused by insufficient vertical angulation of the cone

Correct Incorrect Correct answer

Foreshortening caused by excessive vertical angulation of the cone

Correct Incorrect Correct answer

Cone cut caused by improper horizontal alignment of the beam

Correct Incorrect Correct answer

Overlapping caused by incorrect horizontal angulation

Correct Incorrect Correct answer

A dental assistant takes a bitewing radiograph and notices that a clear, unexposed area appears on one side of the image. What caused this error?

The cone was not properly aligned with the sensor, resulting in a cone cut

Correct Incorrect Correct answer

The patient moved during the exposure, causing a blurred area

Correct Incorrect Correct answer

The sensor was placed backward in the patient's mouth

Correct Incorrect Correct answer

The exposure time was set too low for the patient's anatomy

Correct Incorrect Correct answer

For a maxillary premolar periapical radiograph using the paralleling technique, where should the patient’s head be positioned?

The occlusal plane of the maxillary arch should be parallel to the floor

Correct Incorrect Correct answer

The patient's chin should be tilted upward at a 30-degree angle

Correct Incorrect Correct answer

The midsagittal plane should be tilted toward the side being imaged

Correct Incorrect Correct answer

The head should be tilted backward so the maxillary arch is perpendicular to the floor

Correct Incorrect Correct answer

A dental assistant reviews a periapical radiograph and notices that the interproximal contacts of the premolars are overlapping significantly. What should be corrected when retaking the image?

Adjust the horizontal angulation of the cone to direct the beam through the interproximal contacts

Correct Incorrect Correct answer

Increase the vertical angulation to separate the overlapping contacts

Correct Incorrect Correct answer

Move the sensor closer to the teeth to reduce the overlap

Correct Incorrect Correct answer

Increase the exposure time to improve contrast in the contact areas

Correct Incorrect Correct answer

A dental assistant takes a mandibular molar periapical radiograph and the resulting image shows foreshortened roots. The sensor was positioned correctly using a holder with a ring. What is the most likely cause?

The cone was angled too steeply, with excessive vertical angulation

Correct Incorrect Correct answer

The sensor was placed too far from the teeth being imaged

Correct Incorrect Correct answer

The patient's tongue pushed the sensor away from the lingual surface

Correct Incorrect Correct answer

The exposure settings were too high for the mandibular molar region

Correct Incorrect Correct answer

When a radiographic image must be retaken, what concern should the dental assistant consider before reexposing the patient?

The additional radiation exposure to the patient and the ALARA principle

Correct Incorrect Correct answer

Whether the patient has signed a consent form specifically for retakes

Correct Incorrect Correct answer

The additional cost of the sensor or film being used for the retake

Correct Incorrect Correct answer

Whether the dentist has personally approved the original image first

Correct Incorrect Correct answer

During exposure of a mandibular premolar periapical radiograph, the dental assistant notices the ring on the sensor holder is not flush against the patient’s face. What problem will this cause?

The cone may not be properly aligned, increasing the risk of a cone cut or partial image

Correct Incorrect Correct answer

The image will be overexposed because the source-to-film distance is decreased

Correct Incorrect Correct answer

The patient will receive a higher radiation dose due to beam divergence

Correct Incorrect Correct answer

The sensor will shift position because the holder is not stabilized

Correct Incorrect Correct answer

After a dental procedure, where should the dental assistant dispose of a used anesthetic needle?

In a puncture-resistant sharps disposal container

Correct Incorrect Correct answer

In the regular trash can with a liner

Correct Incorrect Correct answer

In the biohazard waste bag with contaminated gauze

Correct Incorrect Correct answer

Back into the recapped needle guard on the instrument tray

Correct Incorrect Correct answer

What is the primary cause of gingival recession?

Periodontal disease and aggressive toothbrushing

Correct Incorrect Correct answer

Excessive fluoride exposure during childhood

Correct Incorrect Correct answer

Frequent consumption of acidic beverages

Correct Incorrect Correct answer

Use of electric toothbrushes at any speed

Correct Incorrect Correct answer

A patient is scheduled for periodontal surgery to reduce deep pockets around the mandibular molars. Which instrument should the dental assistant have ready for retraction of the surgical flap?

Periosteal elevator

Correct Incorrect Correct answer

Spoon excavator

Correct Incorrect Correct answer

Howe pliers

Correct Incorrect Correct answer

Woodson instrument

Correct Incorrect Correct answer

A periodontist is planning osseous surgery on a patient with generalized moderate to severe bone loss around teeth #18 through #20. What is the primary goal of this procedure?

To reshape the alveolar bone and eliminate bony defects

Correct Incorrect Correct answer

To extract the affected teeth and place immediate implants

Correct Incorrect Correct answer

To apply topical antibiotics to the root surfaces

Correct Incorrect Correct answer

To reattach the periodontal ligament using sutures

Correct Incorrect Correct answer

What is the purpose of a gingival graft procedure?

To cover exposed root surfaces and increase the width of attached gingiva

Correct Incorrect Correct answer

To remove hyperplastic gingival tissue around orthodontic brackets

Correct Incorrect Correct answer

To place a membrane over a furcation involvement

Correct Incorrect Correct answer

To debride the sulcus and reduce inflammation

Correct Incorrect Correct answer

During a periodontal regeneration procedure, the periodontist asks the dental assistant to prepare a barrier membrane. This technique is known as which of the following?

Guided tissue regeneration

Correct Incorrect Correct answer

Apically repositioned flap

Correct Incorrect Correct answer

Free gingival autograft

Correct Incorrect Correct answer

Crown lengthening

Correct Incorrect Correct answer

Calculus that forms on the tooth surface below the gumline is classified as which type?

Subgingival calculus

Correct Incorrect Correct answer

Supragingival calculus

Correct Incorrect Correct answer

Coronal calculus

Correct Incorrect Correct answer

Interproximal calculus

Correct Incorrect Correct answer

The dental hygienist asks the dental assistant to identify the scaling instrument designed with a single cutting edge and area-specific angulation. Which instrument is being described?

Gracey curette

Correct Incorrect Correct answer

Universal curette

Correct Incorrect Correct answer

Sickle scaler

Correct Incorrect Correct answer

Periodontal probe

Correct Incorrect Correct answer

Where does supragingival calculus most commonly accumulate?

Lingual surfaces of the mandibular anterior teeth near the sublingual salivary duct openings

Correct Incorrect Correct answer

Buccal surfaces of the mandibular premolars near the mental foramen

Correct Incorrect Correct answer

Occlusal surfaces of the maxillary molars near the fissure patterns

Correct Incorrect Correct answer

Palatal surfaces of the mandibular canines near the incisive foramen

Correct Incorrect Correct answer

When performing cement mixing for zinc phosphate cement, the dental assistant should incorporate the powder into the liquid using which technique?

Add small increments of powder to the liquid and mix over a large area of the cooled glass slab

Correct Incorrect Correct answer

Add all the powder to the liquid at once and mix rapidly

Correct Incorrect Correct answer

Mix the powder and liquid on a paper pad using a plastic spatula

Correct Incorrect Correct answer

Combine the powder and liquid in a dappen dish and stir with a brush

Correct Incorrect Correct answer

A dental assistant has mixed a luting cement and lifts the spatula from the slab. The cement stretches approximately one inch before breaking. What does this cement consistency indicate?

The cement has reached the correct luting consistency for cementation

Correct Incorrect Correct answer

The cement is too thick and must be remixed with more liquid

Correct Incorrect Correct answer

The cement has already begun to set and should be discarded

Correct Incorrect Correct answer

The cement is too thin and requires additional powder

Correct Incorrect Correct answer

Which type of mixing pad is appropriate for mixing polycarboxylate cement?

A paper mixing pad with a coated, nonabsorbent surface

Correct Incorrect Correct answer

A cooled glass slab stored in the refrigerator

Correct Incorrect Correct answer

An uncoated paper towel placed on the countertop

Correct Incorrect Correct answer

A stainless steel mixing well

Correct Incorrect Correct answer

During spatulation of a dental cement, what is the correct technique for incorporating the powder into the liquid?

Use broad strokes over a wide area of the mixing surface to thoroughly incorporate each increment

Correct Incorrect Correct answer

Stir the mixture in a small circular area at the center of the slab

Correct Incorrect Correct answer

Fold the powder into the liquid using a back-and-forth chopping motion

Correct Incorrect Correct answer

Press the mixture firmly into the slab using the flat side of the spatula

Correct Incorrect Correct answer

A dental assistant is mixing zinc oxide eugenol cement for a temporary restoration. The manufacturer instructs using a figure-eight motion on the paper pad. Why is this specific mixing pattern recommended?

The figure-eight motion ensures uniform incorporation of powder into liquid without introducing excess air

Correct Incorrect Correct answer

It accelerates the setting reaction so the cement sets faster

Correct Incorrect Correct answer

It cools the mixture below room temperature to prevent burns

Correct Incorrect Correct answer

It separates the eugenol from the zinc oxide to improve bonding

Correct Incorrect Correct answer

A dental assistant mixed a glass ionomer cement according to the manufacturer’s directions, but the dentist reports that the cement set before the crown could be seated. Which factor most likely reduced the setting time?

The operatory temperature was warmer than normal, accelerating the chemical reaction

Correct Incorrect Correct answer

Too much liquid was dispensed relative to the powder

Correct Incorrect Correct answer

The cement was mixed on a glass slab instead of a paper pad

Correct Incorrect Correct answer

The assistant mixed the cement too slowly

Correct Incorrect Correct answer

During a composite restoration procedure, the dental assistant is responsible for maintaining a dry field. What is the primary purpose of the high-volume evacuator (HVE)?

To remove water, saliva, debris, and aerosols from the operative site

Correct Incorrect Correct answer

To provide a continuous stream of air to dry the tooth surface

Correct Incorrect Correct answer

To suction only the water spray from the handpiece cooling system

Correct Incorrect Correct answer

To replace the need for cotton rolls and other isolation materials

Correct Incorrect Correct answer

During a procedure on the maxillary right quadrant, the right-handed dentist is seated at the 9 o’clock position. At which of the following clock positions should the dental assistant be seated?

The 3 o'clock position, directly across from the operator

Correct Incorrect Correct answer

The 12 o'clock position, behind the patient's head

Correct Incorrect Correct answer

The 6 o'clock position, at the foot of the dental chair

Correct Incorrect Correct answer

The 9 o'clock position, beside the operator

Correct Incorrect Correct answer

During a mandibular molar restoration, the dentist asks the assistant to retract the tongue away from the working area. Which instrument or method is most appropriate for tongue retraction in four-handed dentistry?

A mouth mirror held in the assistant's left hand to gently deflect the tongue

Correct Incorrect Correct answer

A cotton roll placed on top of the tongue

Correct Incorrect Correct answer

The suction tip pressed firmly against the side of the tongue

Correct Incorrect Correct answer

A bite block inserted between the patient's teeth on the working side

Correct Incorrect Correct answer

What is the primary purpose of proper instrument arrangement on a preset tray before a dental procedure?

To improve efficiency and maintain an organized sequence of instrument use

Correct Incorrect Correct answer

To allow the dentist to sterilize instruments during the procedure

Correct Incorrect Correct answer

To reduce the number of instruments needed for the procedure

Correct Incorrect Correct answer

To eliminate the need for instrument transfer during treatment

Correct Incorrect Correct answer

A dental assistant is preparing a preset tray for a composite restoration. Which instrument grouping should be arranged first on the tray?

Examination instruments: mouth mirror, explorer, cotton pliers

Correct Incorrect Correct answer

Restorative instruments: composite placement instrument, burnisher

Correct Incorrect Correct answer

Anesthetic setup: syringe, needle, carpule

Correct Incorrect Correct answer

Finishing instruments: polishing burs, finishing strips

Correct Incorrect Correct answer

Which instruments are typically included in a basic exam setup for a new patient appointment?

Mouth mirror, explorer, cotton pliers, and periodontal probe

Correct Incorrect Correct answer

Spoon excavator, hatchet, chisel, and hoe

Correct Incorrect Correct answer

Scalpel, tissue forceps, needle holder, and suture scissors

Correct Incorrect Correct answer

High-speed handpiece, bur block, wedge, and matrix band

Correct Incorrect Correct answer

A patient is scheduled for a root canal on tooth #19. When preparing the restorative setup for this appointment, which additional instruments should the dental assistant include beyond the basic examination tray?

Endodontic files, rubber stops, lentulo spiral, and paper points

Correct Incorrect Correct answer

Extraction forceps, elevators, and surgical curettes

Correct Incorrect Correct answer

Orthodontic pliers, bracket positioner, and ligature director

Correct Incorrect Correct answer

Scalers, curettes, and ultrasonic inserts

Correct Incorrect Correct answer

Which instruments are specific to a surgical setup for a tooth extraction?

Elevators, extraction forceps, and surgical curettes

Correct Incorrect Correct answer

Endodontic files, Gates Glidden drills, and spreaders

Correct Incorrect Correct answer

Matrix bands, wedges, and composite placement instruments

Correct Incorrect Correct answer

Scalers, periodontal probes, and Gracey curettes

Correct Incorrect Correct answer

The dental assistant is setting up for a periodontal setup that includes scaling and root planing. Which instruments should be included on the tray specifically for the periodontist?

Gracey curettes, universal scalers, and an ultrasonic scaler insert

Correct Incorrect Correct answer

Band pusher, ligature cutter, and Weingart pliers

Correct Incorrect Correct answer

Spoon excavator, hatchet, and amalgam carrier

Correct Incorrect Correct answer

Endodontic explorer, barbed broach, and rubber dam clamp

Correct Incorrect Correct answer

Which instruments are typically found on an orthodontic setup for bracket placement?

Bracket placement forceps, band pusher, and ligature director

Correct Incorrect Correct answer

Extraction forceps, periosteal elevator, and rongeur

Correct Incorrect Correct answer

Composite placement instrument, curing light, and articulating paper holder

Correct Incorrect Correct answer

Endodontic files, spreaders, and pluggers

Correct Incorrect Correct answer

After completing a procedure, the dental assistant begins breakdown of the treatment area. What is the correct first step?

Don utility gloves and transport contaminated instruments to the sterilization area

Correct Incorrect Correct answer

Remove the patient bib and dismiss the patient from the operatory

Correct Incorrect Correct answer

Spray and wipe all surfaces with intermediate-level disinfectant

Correct Incorrect Correct answer

Remove and discard the barrier coverings from the operatory surfaces

Correct Incorrect Correct answer

What is the purpose of cassette processing in dental instrument sterilization?

To keep instrument sets organized together through cleaning, wrapping, and sterilization

Correct Incorrect Correct answer

To reduce the number of instruments needed for each procedure

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To allow instruments to be sterilized without being cleaned first

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To extend the shelf life of instruments beyond their normal expiration

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A dental office uses a unit dose concept for supply preparation. Which practice best demonstrates this approach?

Dispensing only the amount of material needed for a single patient on individual trays

Correct Incorrect Correct answer

Storing all materials in bulk containers at each operatory station

Correct Incorrect Correct answer

Preparing enough supplies for the entire morning schedule at once

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Using the same dispensing container for multiple patients throughout the day

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During supply preparation for a crown cementation, the dental assistant realizes the cement has expired. What is the appropriate action?

Discard the expired material and obtain a new, unexpired supply before the procedure begins

Correct Incorrect Correct answer

Use the expired cement since it was stored properly and appears normal

Correct Incorrect Correct answer

Mix the expired cement with a fresh batch to extend its effectiveness

Correct Incorrect Correct answer

Proceed with the cementation and document the expired lot number in the chart

Correct Incorrect Correct answer

A dental assistant notices recurring neck and shoulder pain at the end of each workday. Which adjustment to ergonomics during chairside procedures would most effectively reduce this strain?

Positioning the patient chair so the oral cavity is at the assistant's elbow height and maintaining a neutral spine

Correct Incorrect Correct answer

Standing throughout all procedures to reduce compression on the lower back

Correct Incorrect Correct answer

Reaching across the patient to retrieve instruments from the far side of the tray

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Tilting the head forward at a 45-degree angle to improve visibility into the oral cavity

Correct Incorrect Correct answer

The dentist asks the dental assistant to set up for a two-surface amalgam restoration on tooth #30. Which restorative setup components should be included in addition to the basic examination instruments?

Amalgam carrier, condenser, carver, matrix band and retainer, and wedge

Correct Incorrect Correct answer

Composite syringe, curing light, etch gel, and bonding agent

Correct Incorrect Correct answer

Crown and bridge scissors, gingival retraction cord, and provisional material

Correct Incorrect Correct answer

Rubber dam clamp forceps, barbed broach, and endodontic files

Correct Incorrect Correct answer

Which type of dental restoration is permanently cemented onto a prepared tooth and cannot be removed by the patient?

Fixed prosthesis

Correct Incorrect Correct answer

Removable partial denture

Correct Incorrect Correct answer

Complete denture

Correct Incorrect Correct answer

Orthodontic retainer

Correct Incorrect Correct answer

A patient presents for adjustment of a removable prosthesis that has been causing tissue irritation. Which role does the dental assistant perform during this appointment?

Preparing adjustment materials and providing chairside assistance while the dentist modifies the prosthesis

Correct Incorrect Correct answer

Independently adjusting the removable prosthesis with a laboratory handpiece

Correct Incorrect Correct answer

Diagnosing the cause of irritation and prescribing a topical medication

Correct Incorrect Correct answer

Performing a reline procedure without dentist supervision

Correct Incorrect Correct answer

What is the purpose of a rebase procedure for a denture?

To replace the entire denture base material while retaining the existing teeth

Correct Incorrect Correct answer

To add new artificial teeth to an existing partial denture

Correct Incorrect Correct answer

To whiten the artificial teeth on the denture

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To permanently cement the denture onto dental implants

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A patient with two dental implants in the mandibular arch is being evaluated for a prosthetic restoration. The dentist plans to place a bar-retained overdenture. What is the dental assistant’s primary responsibility during implant prosthetics appointments?

Organizing implant components, assisting with impression procedures, and maintaining a clean field

Correct Incorrect Correct answer

Selecting the type of implant abutment and prosthetic design independently

Correct Incorrect Correct answer

Performing the final torquing of the abutment screws to the implant fixtures

Correct Incorrect Correct answer

Evaluating the osseointegration status of the implants through radiographic interpretation

Correct Incorrect Correct answer

When loading a tray with alginate impression material, where should the dental assistant begin placing the material?

In one corner of the tray, pressing firmly to eliminate air voids, then filling across the tray

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Piled high in the center of the tray without pressing

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Spread in a thin layer across the top surface only

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Placed only on the edges of the tray leaving the center empty

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When seating a tray for a maxillary alginate impression, which area should the dental assistant seat first?

The posterior area of the tray, then rotating the anterior portion up into position

Correct Incorrect Correct answer

The anterior portion first, then pushing straight back into the palate

Correct Incorrect Correct answer

The left side first, followed by the right side

Correct Incorrect Correct answer

The center of the palate, then pressing outward toward the buccal areas

Correct Incorrect Correct answer

During model trimming of a dental study model, what is the ideal ratio of anatomical base to art base?

Two-thirds anatomical portion to one-third art base

Correct Incorrect Correct answer

One-half anatomical portion to one-half art base

Correct Incorrect Correct answer

One-third anatomical portion to two-thirds art base

Correct Incorrect Correct answer

Three-quarters anatomical portion to one-quarter art base

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What is the purpose of articulation when working with dental study models?

To mount the maxillary and mandibular models on a device that simulates jaw movements and occlusal relationships

Correct Incorrect Correct answer

To trim the base of the models to a uniform shape

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To pour the impression with dental stone

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To separate the impression from the set model

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During a periapical radiograph, the dental assistant notices the PID is not aligned with the sensor. Which component of the exposure technique is most affected by this misalignment?

Beam alignment with the receptor

Correct Incorrect Correct answer

Patient head stabilization

Correct Incorrect Correct answer

Exposure time selection

Correct Incorrect Correct answer

Sensor cable management

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When taking a periapical radiograph using the paralleling technique, where should the open end of the cone (PID) be positioned?

As close to the patient's face as possible without touching the skin

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At least 6 inches away from the patient's face

Correct Incorrect Correct answer

Touching the patient's skin for stability

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At the same height as the patient's ear

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A dental assistant is preparing to expose a maxillary premolar periapical radiograph. How should the patient be positioned in the dental chair?

Seated upright with the occlusal plane parallel to the floor and the midsagittal plane perpendicular to the floor

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Reclined at a 45-degree angle with the chin tilted upward

Correct Incorrect Correct answer

Seated upright with the chin tilted down toward the chest

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Supine position with the head turned slightly to one side

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Which of the following factors is MOST important when evaluating the diagnostic quality of a dental radiograph at chairside?

Proper density and contrast to visualize all anatomical structures

Correct Incorrect Correct answer

The image is stored in the correct patient file

Correct Incorrect Correct answer

The exposure was completed within the time allotted

Correct Incorrect Correct answer

The patient did not report discomfort during the exposure

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What type of digital receptor uses a reusable imaging plate that must be scanned in a separate device after exposure?

Phosphor storage plate (PSP)

Correct Incorrect Correct answer

Charge-coupled device (CCD) sensor

Correct Incorrect Correct answer

Complementary metal-oxide semiconductor (CMOS) sensor

Correct Incorrect Correct answer

Conventional D-speed film

Correct Incorrect Correct answer

In four-handed dentistry, the area directly in front of the patient’s mouth where the dentist works is referred to as which zone?

Operating zone (operator's zone)

Correct Incorrect Correct answer

Transfer zone

Correct Incorrect Correct answer

Static zone

Correct Incorrect Correct answer

Assistant's zone

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During a restorative procedure, the dental assistant is using the high-volume evacuator (HVE) to maintain a clear field of vision. Where should the HVE tip be positioned relative to the tooth being treated?

On the lingual or opposite side of the tooth being treated, close to the site

Correct Incorrect Correct answer

Directly on top of the tooth being prepared

Correct Incorrect Correct answer

At the back of the patient's throat

Correct Incorrect Correct answer

On the same side as the dentist's handpiece

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During four-handed dentistry, the dental assistant uses a mouth mirror for indirect vision and to retract the tongue or cheek. What is this technique called?

Mirror retraction

Correct Incorrect Correct answer

Fulcrum stabilization

Correct Incorrect Correct answer

Instrument transfer

Correct Incorrect Correct answer

Aspiration technique

Correct Incorrect Correct answer

Which teeth are commonly referred to as ‘wisdom teeth’?

Third molars (teeth #1, #16, #17, and #32 in the Universal numbering system)

Correct Incorrect Correct answer

Second molars (teeth #2, #15, #18, and #31)

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First premolars (teeth #5, #12, #21, and #28)

Correct Incorrect Correct answer

Canines (teeth #6, #11, #22, and #27)

Correct Incorrect Correct answer

Which of the following materials is most commonly placed at the extraction site to achieve hemostasis after a tooth extraction?

Folded gauze applied with biting pressure

Correct Incorrect Correct answer

A cotton pellet soaked in cavity varnish

Correct Incorrect Correct answer

An alginate impression over the socket

Correct Incorrect Correct answer

A piece of dental floss tied around the adjacent teeth

Correct Incorrect Correct answer

Following a surgical extraction, a patient calls the office reporting continued oozing of blood from the extraction site. What instruction should the dental assistant provide?

Fold a piece of moistened gauze, place it over the site, and bite down firmly for 20 to 30 minutes

Correct Incorrect Correct answer

Rinse vigorously with warm salt water to remove the clot

Correct Incorrect Correct answer

Apply ice directly inside the mouth on the extraction site

Correct Incorrect Correct answer

Take an extra dose of aspirin to reduce inflammation

Correct Incorrect Correct answer

In the FDI (Federation Dentaire Internationale) tooth numbering system, what does the first digit of a two-digit number represent?

The quadrant in which the tooth is located

Correct Incorrect Correct answer

The type of tooth (incisor, canine, premolar, or molar)

Correct Incorrect Correct answer

The patient's age group (primary or permanent dentition)

Correct Incorrect Correct answer

The surface of the tooth being charted

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In the Universal (ADA) tooth numbering system, how many numbers are used for the permanent dentition, and what is the range?

32 teeth, numbered 1 through 32

Correct Incorrect Correct answer

28 teeth, numbered 1 through 28

Correct Incorrect Correct answer

20 teeth, numbered A through T

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32 teeth, numbered 11 through 48

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During a comprehensive examination, the dentist tells the dental assistant to chart ‘treatment planned: crown on #19.’ How should this be recorded in the patient’s chart?

Using the appropriate symbol for a planned crown on tooth #19, typically in a different color (such as red or blue) to indicate it is treatment planned rather than existing

Correct Incorrect Correct answer

Charting a completed crown restoration on tooth #19 using the existing work color

Correct Incorrect Correct answer

Writing 'crown needed' in the patient's medical history section only

Correct Incorrect Correct answer

Leaving the chart blank until the crown is actually placed

Correct Incorrect Correct answer

When preparing a dental dam, which size hole should be punched for the anchor tooth (the tooth that receives the clamp)?

The largest hole size (key hole punch) to accommodate the clamp

Correct Incorrect Correct answer

The smallest hole size to create a tight seal

Correct Incorrect Correct answer

The same size as all other teeth in the isolation area

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No hole is needed for the anchor tooth

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Why is a water-soluble lubricant applied to the underside of the dental dam before placement?

To ease the dam material over the teeth and through the interproximal contacts

Correct Incorrect Correct answer

To disinfect the dam material before intraoral use

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To bond the dam to the tooth surface for better retention

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To prevent the dam material from changing color during the procedure

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After placing a composite restoration, the dentist asks the patient to bite down on articulating paper to check the occlusion. The paper leaves marks on the restoration indicating high spots. What is the next step?

The dentist adjusts the restoration by selectively trimming the marked high spots until the patient's bite is even and comfortable

Correct Incorrect Correct answer

The restoration is removed and a new one is placed from scratch

Correct Incorrect Correct answer

The patient is told to chew on the restoration to wear down the high spots naturally

Correct Incorrect Correct answer

Additional composite material is added to the opposing tooth to balance the occlusion

Correct Incorrect Correct answer

Which type of cement is most commonly used to bond orthodontic brackets to tooth surfaces?

Light-cured or dual-cured composite resin adhesive (orthodontic bonding cement)

Correct Incorrect Correct answer

Zinc oxide eugenol (ZOE) cement

Correct Incorrect Correct answer

Zinc phosphate cement mixed to a thick consistency

Correct Incorrect Correct answer

Temporary soft cement (non-eugenol)

Correct Incorrect Correct answer

When pouring a working cast that requires maximum accuracy and strength for fabricating a crown, which gypsum product should the dental assistant select?

Type IV die stone (high-strength dental stone)

Correct Incorrect Correct answer

Type II model plaster

Correct Incorrect Correct answer

Type I impression plaster

Correct Incorrect Correct answer

Type III laboratory stone

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Which factor is most critical for the dental assistant to verify before positioning the patient for a dental radiograph?

Confirming that the patient positioning in the chair allows the occlusal plane to be parallel to the floor for maxillary images

Correct Incorrect Correct answer

Selecting the correct film speed based on the patient's body weight

Correct Incorrect Correct answer

Adjusting the room lighting to maximum brightness for clear visibility

Correct Incorrect Correct answer

Confirming that the patient has eaten within the last two hours

Correct Incorrect Correct answer

What type of intraoral imaging receptor uses a reusable phosphor plate that is scanned after exposure to produce a digital image?

Photostimulable phosphor (PSP) plate

Correct Incorrect Correct answer

Charge-coupled device (CCD) sensor

Correct Incorrect Correct answer

Complementary metal-oxide semiconductor (CMOS) sensor

Correct Incorrect Correct answer

Conventional silver halide film

Correct Incorrect Correct answer

Why is lubrication applied to a dental dam before placement?

To make the dam slide more easily over the teeth and through the interproximal contacts

Correct Incorrect Correct answer

To prevent the dam material from tearing during clamp placement

Correct Incorrect Correct answer

To create a better seal between the dam and the gingival tissue

Correct Incorrect Correct answer

To reduce the patient's allergic response to the latex material

Correct Incorrect Correct answer

Which term is commonly used interchangeably with ‘third molar’ when discussing impacted teeth that often require surgical extraction?

Wisdom tooth

Correct Incorrect Correct answer

Canine tooth

Correct Incorrect Correct answer

Second premolar

Correct Incorrect Correct answer

First molar

Correct Incorrect Correct answer

Which material is used to bond orthodontic brackets directly to the enamel surface of teeth?

Light-cured orthodontic cement (composite resin adhesive)

Correct Incorrect Correct answer

Zinc phosphate cement

Correct Incorrect Correct answer

Zinc oxide eugenol (ZOE) cement

Correct Incorrect Correct answer

Calcium hydroxide liner

Correct Incorrect Correct answer

In the Federation Dentaire Internationale (FDI) notation system, how are teeth identified?

Each tooth is identified by a two-digit number where the first digit indicates the quadrant and the second digit indicates the tooth position within that quadrant

Correct Incorrect Correct answer

Teeth are numbered 1 through 32 starting from the upper right third molar

Correct Incorrect Correct answer

Primary teeth are labeled A through T and permanent teeth are numbered 1 through 32

Correct Incorrect Correct answer

Each tooth is identified by its quadrant letter (UR, UL, LR, LL) followed by a tooth number

Correct Incorrect Correct answer

During a composite restoration, the dental assistant uses the high-volume evacuator (HVE) to maintain a dry field. Where should the HVE tip be positioned relative to the tooth being restored?

On the lingual or opposite side of the tooth, close to the operative site without obstructing the dentist's access

Correct Incorrect Correct answer

Directly on top of the tooth being restored to remove all moisture from the preparation

Correct Incorrect Correct answer

In the vestibule of the opposite arch to collect overflow from the air-water syringe

Correct Incorrect Correct answer

Resting on the patient's tongue to retract it away from the treatment area

Correct Incorrect Correct answer

During a Class II composite restoration, the dentist asks the dental assistant to place the matrix band and wedge. What is the purpose of the wedge?

To adapt the matrix band tightly against the tooth and create proper interproximal contact and contour

Correct Incorrect Correct answer

To hold the rubber dam clamp in place during the restorative procedure

Correct Incorrect Correct answer

To separate the teeth enough for the dentist to see the cavity preparation

Correct Incorrect Correct answer

To prevent the patient from closing the mouth during material placement

Correct Incorrect Correct answer

After placing a composite restoration, the dentist checks the occlusion with articulating paper. Blue marks appear on the restoration. What do these marks indicate?

High points on the restoration where the opposing teeth make premature contact

Correct Incorrect Correct answer

Areas where the composite material has not fully cured

Correct Incorrect Correct answer

Locations where the bonding agent failed to adhere to the enamel

Correct Incorrect Correct answer

Spots where the cavity liner is showing through the composite

Correct Incorrect Correct answer

During a root canal procedure, the dentist asks the dental assistant to irrigate the canals. What is the most commonly used irrigation solution?

Sodium hypochlorite solution

Correct Incorrect Correct answer

Sterile saline solution

Correct Incorrect Correct answer

Hydrogen peroxide at full concentration

Correct Incorrect Correct answer

Chlorhexidine mouthwash

Correct Incorrect Correct answer

What is the primary difference between gingivitis and periodontitis?

Gingivitis is inflammation limited to the gingival tissue, while periodontitis involves destruction of the supporting bone and periodontal ligament

Correct Incorrect Correct answer

Gingivitis only occurs in children, while periodontitis is an adult disease

Correct Incorrect Correct answer

Gingivitis is caused by bacteria, while periodontitis is caused by viral infection

Correct Incorrect Correct answer

Gingivitis requires surgical treatment, while periodontitis is treated with antibiotics alone

Correct Incorrect Correct answer

A patient’s new porcelain-fused-to-metal crown has been received from the laboratory. Before cementation, the dentist tries it in the patient’s mouth. What should the dental assistant prepare for this try-in appointment?

Articulating paper, a mirror, explorer, cotton rolls, and the appropriate permanent cement for final cementation

Correct Incorrect Correct answer

Impression material and a stock tray in case a new impression is needed

Correct Incorrect Correct answer

A temporary crown kit in case the permanent crown does not fit

Correct Incorrect Correct answer

Orthodontic bands and cement for securing the crown temporarily

Correct Incorrect Correct answer

At what age does the first permanent molar typically erupt?

Approximately 6 years of age

Correct Incorrect Correct answer

Approximately 3 years of age

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Approximately 9 years of age

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Approximately 12 years of age

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Which dental instrument has a thin, flexible wire tip used to detect caries, calculus, and other irregularities on tooth surfaces?

Explorer

Correct Incorrect Correct answer

Periodontal probe

Correct Incorrect Correct answer

Cotton pliers

Correct Incorrect Correct answer

Burnisher

Correct Incorrect Correct answer

The dentist calls out ‘tooth number 19, MOD caries’ during an oral examination. What should the dental assistant chart?

Mark caries on the mesial, occlusal, and distal surfaces of the mandibular left first molar

Correct Incorrect Correct answer

Mark caries on the mesial, occlusal, and distal surfaces of the maxillary left first molar

Correct Incorrect Correct answer

Mark a missing tooth at position 19 on the chart

Correct Incorrect Correct answer

Mark an existing restoration on the mesial, occlusal, and distal surfaces of tooth 19

Correct Incorrect Correct answer

After removing an alginate impression from the patient’s mouth, what should the dental assistant do immediately?

Rinse the impression under running water to remove saliva, spray with disinfectant, and pour the model within the recommended time frame

Correct Incorrect Correct answer

Wrap the impression in a dry paper towel and store it in a cabinet for later pouring

Correct Incorrect Correct answer

Soak the impression in a water bath to keep it moist until the laboratory technician arrives

Correct Incorrect Correct answer

Place the impression directly in the mailing box to send to the laboratory without rinsing

Correct Incorrect Correct answer

Which dental material is placed directly over an area of near-pulp exposure to promote reparative dentin formation?

Calcium hydroxide liner

Correct Incorrect Correct answer

Zinc phosphate cement

Correct Incorrect Correct answer

Glass ionomer cement

Correct Incorrect Correct answer

Zinc oxide eugenol temporary cement

Correct Incorrect Correct answer

After a tooth extraction, the patient is given post-operative instructions. Which instruction is most important for preventing dry socket (alveolar osteitis)?

Avoid using a straw, spitting forcefully, or smoking for at least 24 to 48 hours after the extraction

Correct Incorrect Correct answer

Apply a warm compress to the cheek immediately after leaving the office

Correct Incorrect Correct answer

Rinse vigorously with mouthwash every hour to keep the extraction site clean

Correct Incorrect Correct answer

Eat hard, crunchy foods to stimulate blood flow and promote healing

Correct Incorrect Correct answer

What is the purpose of placing separators (spacers) between teeth before orthodontic band placement?

To create slight space between the teeth so the orthodontic band can be fitted and seated properly

Correct Incorrect Correct answer

To strengthen the enamel surface before the bracket is bonded

Correct Incorrect Correct answer

To align the teeth into their final position before archwire placement

Correct Incorrect Correct answer

To remove existing restorations that would interfere with bracket bonding

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When breaking down the operatory after a dental procedure, what is the proper order for handling contaminated instruments?

Transport instruments to the sterilization area in a covered cassette or container, pre-clean, package, and sterilize

Correct Incorrect Correct answer

Leave instruments on the tray until the end of the day for batch processing

Correct Incorrect Correct answer

Rinse instruments in the operatory sink and return them to the instrument drawer

Correct Incorrect Correct answer

Place instruments directly into sterilization pouches without any pre-cleaning

Correct Incorrect Correct answer

The dentist asks the dental assistant to place a dental dam for a Class III composite restoration on tooth number 8. Which tooth should receive the clamp to anchor the dam?

A posterior tooth (anchor tooth) such as the first or second premolar on the same side, positioned one to two teeth distal to the treatment area

Correct Incorrect Correct answer

The tooth being restored (tooth number 8) should receive the clamp

Correct Incorrect Correct answer

The most posterior molar on the opposite side of the arch

Correct Incorrect Correct answer

No clamp is used for anterior restorations; the dam is held by the patient

Correct Incorrect Correct answer

What is the function of an abutment in a fixed bridge?

The abutment is a natural tooth or implant that supports and retains the fixed bridge

Correct Incorrect Correct answer

The abutment is the artificial tooth that replaces the missing tooth in the bridge

Correct Incorrect Correct answer

The abutment is the cement used to bond the bridge to the teeth

Correct Incorrect Correct answer

The abutment is the connector that joins the pontic to the retainer

Correct Incorrect Correct answer

What material is most commonly used to obturate (fill) root canals after cleaning and shaping?

Gutta percha with a root canal sealer

Correct Incorrect Correct answer

Composite resin with an adhesive bonding agent

Correct Incorrect Correct answer

Amalgam packed into the canal space

Correct Incorrect Correct answer

Calcium hydroxide paste used as a permanent filling

Correct Incorrect Correct answer

A dental assistant notices suspicious bruising patterns on a pediatric patient’s arms and neck during a routine appointment. What is the assistant’s legal obligation?

Report the suspicion to the appropriate authorities, as dental professionals are mandated reporters of suspected child abuse

Correct Incorrect Correct answer

Confront the parent directly about the bruising before deciding whether to report

Correct Incorrect Correct answer

Document the findings in the chart but take no further action unless the child discloses abuse

Correct Incorrect Correct answer

Wait until the next appointment to see if new bruising appears before making a report

Correct Incorrect Correct answer

The dental assistant is preparing tray setups for the afternoon schedule, which includes a composite restoration, a crown preparation, and two hygiene exams. What is the most efficient approach?

Pre-set individual cassettes or tray setups specific to each procedure type and arrange them in the order of the schedule

Correct Incorrect Correct answer

Set up one universal tray with every instrument the office owns and use it for all procedures

Correct Incorrect Correct answer

Wait until each patient is seated before gathering instruments from the sterilization area

Correct Incorrect Correct answer

Place all instruments for the afternoon in a single cassette to save processing time

Correct Incorrect Correct answer

Which rotary instrument has fluted cutting blades and is used in a high-speed handpiece to remove tooth structure during cavity preparation?

Carbide bur

Correct Incorrect Correct answer

Rubber polishing cup

Correct Incorrect Correct answer

Prophy angle brush

Correct Incorrect Correct answer

Diamond stone

Correct Incorrect Correct answer

What is the purpose of acid etching the enamel surface before placing a composite restoration?

To create microscopic roughness on the enamel that allows the bonding agent to mechanically interlock with the tooth surface

Correct Incorrect Correct answer

To sterilize the tooth surface and eliminate bacteria from the cavity preparation

Correct Incorrect Correct answer

To soften the enamel so the composite material can penetrate into the tooth structure

Correct Incorrect Correct answer

To change the color of the enamel so the dentist can see the preparation margins more clearly

Correct Incorrect Correct answer

A patient wearing a complete upper denture reports that the denture feels loose and no longer stays in place. The dentist determines the tissue surface of the denture no longer fits the ridge. What procedure can restore the fit?

A reline, which involves adding new material to the tissue surface of the denture to improve adaptation to the current ridge shape

Correct Incorrect Correct answer

A crown lengthening procedure on the remaining ridge to provide more retention

Correct Incorrect Correct answer

Replacing all the denture teeth with a different shade and size

Correct Incorrect Correct answer

Adjusting the occlusal surfaces of the denture by adding composite material

Correct Incorrect Correct answer

In the clock position system used in four-handed dentistry, what is the static zone?

The area directly behind the patient's head (approximately 12 o'clock) where the mobile cart or rear delivery unit is positioned

Correct Incorrect Correct answer

The zone from 7 to 9 o'clock where the operator sits during the procedure

Correct Incorrect Correct answer

The zone from 2 to 4 o'clock where the dental assistant is positioned

Correct Incorrect Correct answer

The zone from 4 to 7 o'clock where the patient enters and exits the chair

Correct Incorrect Correct answer

In the Universal numbering system, which number is assigned to the maxillary right third molar?

Tooth number 1

Correct Incorrect Correct answer

Tooth number 16

Correct Incorrect Correct answer

Tooth number 17

Correct Incorrect Correct answer

Tooth number 32

Correct Incorrect Correct answer

What is the correct water-to-powder ratio for mixing Type III dental stone when pouring a study model?

Follow the manufacturer's specified water-to-powder ratio, typically measured by weight for consistency

Correct Incorrect Correct answer

Use equal volumes of water and powder mixed by visual estimation

Correct Incorrect Correct answer

Add water until the mixture reaches a pourable consistency regardless of the amount used

Correct Incorrect Correct answer

Use the same ratio as for mixing plaster since all gypsum products are identical

Correct Incorrect Correct answer

After a periodontal surgery, the dentist places a periodontal dressing over the surgical site. What is the purpose of this dressing?

To protect the surgical area, reduce discomfort, and hold the tissues in place during initial healing

Correct Incorrect Correct answer

To deliver antibiotics directly to the surgical site for infection prevention

Correct Incorrect Correct answer

To permanently seal the gingival tissue to the tooth surface

Correct Incorrect Correct answer

To replace the sutures and eliminate the need for a follow-up visit

Correct Incorrect Correct answer

Which instrument is used to loosen a tooth from the periodontal ligament before extraction with forceps?

Elevator (periosteal or dental elevator)

Correct Incorrect Correct answer

Hemostat (locking forceps)

Correct Incorrect Correct answer

Rongeur (bone-cutting forceps)

Correct Incorrect Correct answer

Curette (surgical scraping instrument)

Correct Incorrect Correct answer

The dentist asks for a ‘spoon’ during a caries removal procedure. Which instrument should the dental assistant pass?

Spoon excavator, a hand instrument with a rounded, scoop-shaped blade used to remove soft decayed tooth structure

Correct Incorrect Correct answer

A mixing spatula used for cement preparation

Correct Incorrect Correct answer

A condenser used to pack amalgam into a cavity preparation

Correct Incorrect Correct answer

A plastic instrument used to place composite material

Correct Incorrect Correct answer

An orthodontic patient calls to report that an archwire is poking the inside of their cheek and causing irritation. What advice should the dental assistant provide?

Apply orthodontic wax over the protruding wire to cushion the area and schedule an appointment for wire adjustment

Correct Incorrect Correct answer

Cut the wire with household scissors and call back if bleeding occurs

Correct Incorrect Correct answer

Remove the archwire completely and bring it to the next appointment

Correct Incorrect Correct answer

Ignore the discomfort since it is a normal part of orthodontic treatment

Correct Incorrect Correct answer

The dentist asks the dental assistant to mix glass ionomer cement for a base under a composite restoration. What mixing surface should be used?

A treated paper mixing pad, using the manufacturer's recommended technique for combining the powder and liquid

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A chilled glass slab to slow the setting reaction like zinc phosphate cement

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A rubber bowl and spatula like those used for alginate mixing

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The palm of the gloved hand to warm the material and speed setting

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What is the function of a Tofflemire matrix retainer in restorative dentistry?

To hold the matrix band around the tooth during placement of a Class II restoration, creating a temporary wall for the missing proximal surface

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To retract the gingival tissue during crown preparation procedures

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To stabilize the dental dam clamp on the anchor tooth

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To hold the composite material in place during light curing

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During a root canal procedure, the dentist uses an electronic apex locator. What does this device measure?

The distance from the file tip to the apical foramen of the root canal, helping determine the working length

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The temperature of the pulp tissue to assess vitality

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The bacterial count inside the canal to determine if irrigation is adequate

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The hardness of the dentin walls to evaluate root canal preparation quality

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What is the term for recession of the gingival margin that exposes the root surface of a tooth?

Gingival recession

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Gingival hyperplasia

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Gingival cleft

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Gingival fibromatosis

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What tool does the dentist use to select the correct tooth color when fabricating a porcelain or ceramic restoration?

A shade guide with standardized color tabs compared to the patient's natural teeth

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A color wheel chart used for mixing dental paints

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A spectrophotometer reading from the opposing arch

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A digital camera with automatic color correction

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What is the tell-show-do behavior management technique used in pediatric dentistry?

A method where the dental team explains a procedure verbally (tell), demonstrates it visually or on a model (show), and then performs it (do)

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A technique where the child is told to close their eyes, shown a prize, and then given the prize after treatment

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A method of restraining the child by telling them to hold still, showing them the restraint, and then applying it

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A system of rewarding children with stickers after telling them about brushing and showing them proper technique

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During charting, the dentist identifies a tooth that is drifted mesially into the space of a previously extracted adjacent tooth. How should this finding be recorded on the dental chart?

Draw an arrow on the chart showing the direction of drift (mesial) from the tooth's normal position

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Mark the tooth as missing since it has moved from its original position

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Record the tooth as impacted because it has shifted from normal alignment

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Leave the chart unchanged since tooth drift is not a significant clinical finding

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During a denture try-in appointment, the dentist evaluates the wax setup on the patient. What aspects are assessed during this try-in?

Shade and arrangement of the teeth, vertical dimension, lip support, centric relation, and overall aesthetics

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Only the shade of the denture teeth to confirm the laboratory matched the prescription

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Only the occlusion using articulating paper to check the bite

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Only the fit of the baseplate on the ridge without evaluating tooth arrangement

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After a surgical extraction, the patient is asked to bite on a gauze pad. What is the purpose of this instruction?

To apply pressure over the extraction site to promote hemostasis (blood clot formation) and reduce bleeding

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To absorb saliva and keep the patient comfortable during recovery

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To protect the sutures from being disturbed by the patient's tongue

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To prevent air from entering the extraction socket and causing dry socket

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When placing a dental dam for a posterior restoration, the dental assistant punches holes in the dam material. What determines the size and spacing of the holes?

The size of the teeth being isolated and the distance between them, using a dental dam template or stamp as a guide

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All holes are punched the same size regardless of tooth type or position

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The holes are punched randomly and adjusted during placement on the teeth

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Only one hole is punched for the tooth being restored; adjacent teeth are not isolated

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When loading alginate into an impression tray, the dental assistant fills the tray in one smooth motion and then smooths the surface. What is the purpose of smoothing the surface of the loaded alginate?

To eliminate air pockets and voids that could distort the impression and create inaccuracies in the resulting model

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To make the material more visually appealing before inserting it in the patient's mouth

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To speed up the setting time of the alginate by exposing more surface area to air

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To create a flat surface that prevents the alginate from sticking to the teeth

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What is the principle of ‘unit dosing’ in infection control for dental operatory supply management?

Dispensing only the amount of material needed for one patient and discarding any unused portion rather than returning it to the bulk supply

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Ordering supplies in individual patient kits from the manufacturer

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Storing all supplies in a central location rather than in each operatory

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Measuring each material by weight rather than by volume

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What type of curing light is used to polymerize light-cured composite resin restorations?

A visible blue LED (light-emitting diode) curing light that emits wavelengths of approximately 430 to 480 nanometers

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An ultraviolet (UV) light that activates a chemical reaction in the composite

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An infrared heat lamp that warms the composite to initiate setting

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A standard fluorescent room light aimed directly at the restoration

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What is the function of cotton pliers (locking tweezers) in dental procedures?

To grasp and place small items such as cotton pellets, wedges, matrix bands, and other materials in or near the oral cavity

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To condense amalgam into cavity preparations

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To cut suture material after surgical procedures

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To remove calculus deposits from tooth surfaces

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The dentist is performing an examination and asks the dental assistant to retract the cheek for visibility. Which device is most commonly used for cheek retraction?

The mouth mirror, held by the assistant to retract the cheek while simultaneously providing indirect vision and light reflection

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A metal cheek retractor placed in the corner of the mouth and left in position during the entire examination

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The saliva ejector tip pressed against the inner cheek to hold it away from the teeth

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The assistant's finger placed directly inside the patient's mouth to retract the cheek

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A 4-year-old child needs a stainless steel crown on a primary molar. What does the dental assistant need to know about this restoration?

Stainless steel crowns are prefabricated, trimmed to fit, and cemented as full-coverage restorations for severely decayed primary molars

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Stainless steel crowns are custom-made in a dental laboratory for each patient

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Stainless steel crowns are temporary restorations that must be replaced with porcelain within six months

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Stainless steel crowns are only used on permanent teeth and are never placed on primary teeth

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What role does dental calculus (tartar) play in periodontal disease?

Calculus provides a rough, porous surface that harbors bacterial plaque and makes it more difficult to remove through home care, contributing to gingival inflammation

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Calculus directly destroys the periodontal ligament through chemical dissolving of the fibers

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Calculus is a protective layer that forms naturally and should not be removed during dental cleanings

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Calculus contains antibodies that fight bacterial infection in the gingival sulcus

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What test uses a small electrical current applied to a tooth to determine whether the pulp responds to stimulation?

Electric pulp test (EPT)

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Percussion test

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Mobility test

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Bite test

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How are primary (deciduous) teeth labeled in the Universal numbering system?

With capital letters A through T, starting with the maxillary right second primary molar (A) and ending with the mandibular right second primary molar (T)

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With lowercase letters a through t corresponding to the same pattern as permanent teeth

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With numbers 51 through 70 starting from the upper right quadrant

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With Roman numerals I through XX starting from the lower left quadrant

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What is a pontic in a fixed dental bridge?

The artificial tooth that replaces the missing natural tooth and is suspended between the abutment crowns

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The cement used to permanently attach the bridge to the abutment teeth

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The metal framework that connects the individual crown units of the bridge

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The natural tooth that is prepared to support the bridge retainer

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During a Class I composite restoration, the dentist applies a bonding agent to the etched enamel surface. What should the dental assistant have ready to use immediately after the bonding agent is applied?

The curing light, positioned for immediate light activation of the bonding agent

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The high-volume evacuator to suction the excess bonding agent from the tooth

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A fresh cotton roll to blot the bonding agent dry before composite placement

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The amalgam carrier loaded with composite material for immediate placement

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What is the function of an orthodontic archwire?

To provide the force that guides teeth into their desired positions; the archwire is held in the brackets and applies continuous pressure to move teeth

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To protect the teeth from caries by covering the enamel surface during orthodontic treatment

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To replace missing teeth during orthodontic treatment until permanent restorations are placed

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To anchor the orthodontic bands to the enamel surface using a chemical bond

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After a tooth extraction, what material is commonly used to close the surgical site?

Absorbable or non-absorbable sutures to approximate the tissue edges and promote healing

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Composite resin placed directly in the extraction socket to fill the space

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Orthodontic wire twisted across the socket to hold the tissue in place

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Dental cement applied over the socket to create a rigid seal

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A dental assistant is preparing materials for a pit and fissure sealant procedure on a 7-year-old patient’s newly erupted first permanent molars. What sequence of steps does this procedure follow?

Clean the tooth surface, isolate and dry the tooth, etch the enamel with phosphoric acid, rinse and dry, apply sealant material to the pits and fissures, and light cure

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Anesthetize the tooth, drill a small preparation into each fissure, place composite resin, and cure

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Apply fluoride varnish over the pits and fissures and let it set for four minutes

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Place a stainless steel crown over the tooth to seal all surfaces permanently

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What dental instrument has a flat, paddle-shaped working end and is used to smooth and contour the surface of a freshly placed amalgam restoration?

Burnisher

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Condenser (plugger)

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Carver

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Explorer

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What items are included in a standard examination tray setup used for a routine dental examination?

Mouth mirror, explorer, cotton pliers (college pliers), periodontal probe, and a package of 2×2 gauze

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High-speed handpiece, carbide burs, and anesthetic syringe

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Impression tray, alginate powder, and mixing bowl

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Extraction forceps, elevators, and suture kit

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What instrument is used to record the relationship between the maxillary arch and the temporomandibular joint for articulator mounting?

Facebow

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Bite stick

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Articulating paper

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Crown remover

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The dentist asks the dental assistant to prepare a polycarboxylate cement for luting a stainless steel crown on a pediatric patient. What mixing surface should be used?

A treated paper pad or a non-absorbent glass slab, mixing the powder into the liquid quickly according to the manufacturer's instructions

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A rubber bowl with a wide-blade spatula, using the same technique as for alginate

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A heated glass slab to accelerate the setting reaction for faster placement

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A metal cement spatula on the palm of the gloved hand for warmth

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In four-handed dentistry, what is the transfer zone?

The area near the patient's chin where instruments are exchanged between the operator and the dental assistant during procedures

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The storage area on the mobile cart where instruments are kept before use

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The front of the patient's chest where the patient bib is placed

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The area between the operatory door and the dental chair where patients walk

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What is the difference between a pulpotomy and a pulpectomy?

A pulpotomy removes only the coronal pulp tissue, while a pulpectomy removes all pulp tissue from both the crown and root canals

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A pulpotomy is performed on permanent teeth, while a pulpectomy is only for primary teeth

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A pulpotomy uses calcium hydroxide, while a pulpectomy uses only gutta percha

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A pulpotomy is a diagnostic test, while a pulpectomy is a complete root canal treatment

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The dentist records probing depths of 2, 2, 3, 2, 2, 3 mm around a patient’s mandibular first molar. What do these readings indicate about the periodontal health of this tooth?

The probing depths are within the normal range (1 to 3 mm), indicating healthy periodontal attachment around this tooth

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The readings indicate severe bone loss requiring immediate periodontal surgery

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The readings indicate gingivitis that has progressed to early periodontitis

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The readings are abnormally low and suggest the probe is not reaching the bottom of the sulcus

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How is an existing (completed) restoration typically indicated on a dental chart?

The surfaces involved are filled in or colored (commonly in blue or black) on the tooth diagram to show the restoration is in place

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An X is drawn through the entire tooth to indicate it has been treated

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A circle is drawn around the tooth number with no markings on the diagram

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The tooth is left blank on the chart since restorations are only recorded in progress notes

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DANB CDA – GC: Chairside Dentistry — All Questions

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