NEW YORK DENTAL ASSISTANT CERTIFICATION
EXAM QUESTIONS AND CORRECT ANSWERS
(VRERIFIED ANSWERS) Q&A 2026|INSTANT
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1. Which is the primary purpose of hand hygiene in a dental
setting?
A. Improve grip strength
B. Remove visible stains
C. Prevent cross-contamination
D. Reduce paperwork errors
Rationale: Hand hygiene reduces transmission of
microorganisms between patients and staff.
Answer: C
2. What is the correct PPE for routine dental procedures?
A. Gloves only
B. Mask and gloves only
C. Mask, gloves, protective eyewear
D. Gown only
Rationale: Standard precautions require full barrier protection.
Answer: C
3. The main function of saliva is to:
,A. Increase bacterial growth
B. Aid digestion and protect teeth
C. Harden enamel
D. Replace gingival fluid
Rationale: Saliva helps digestion and neutralizes acids.
Answer: B
4. Which instrument is used to examine teeth surfaces?
A. Explorer
B. Burnisher
C. Excavator
D. Condenser
Rationale: Explorer detects decay and surface irregularities.
Answer: A
5. Dental plaque is best described as:
A. Hardened calculus
B. A viral infection
C. Soft bacterial biofilm
D. Tooth enamel erosion
Rationale: Plaque is a sticky bacterial layer.
Answer: C
6. Which tooth surface faces the tongue?
,A. Buccal
B. Lingual
C. Occlusal
D. Distal
Rationale: Lingual surface is toward the tongue.
Answer: B
7. The universal numbering system starts with:
A. Upper left third molar
B. Upper right third molar
C. Lower right third molar
D. Lower left central incisor
Rationale: Tooth #1 is upper right third molar.
Answer: B
8. What is the function of fluoride?
A. Whitens teeth instantly
B. Prevents decay by strengthening enamel
C. Removes calculus
D. Destroys nerves
Rationale: Fluoride increases enamel resistance.
Answer: B
9. Which is a symptom of gingivitis?
, A. Tooth loss
B. Bleeding gums
C. Enamel fracture
D. Dry mouth only
Rationale: Gingivitis causes gum inflammation and bleeding.
Answer: B
10. Sterilization in dentistry is used to:
A. Clean surfaces only
B. Kill all microorganisms including spores
C. Remove stains
D. Reduce pain
Rationale: Sterilization eliminates all microbial life.
Answer: B
11. Which solution is commonly used for surface disinfection?
A. Saline
B. Sodium hypochlorite
C. Distilled water
D. Alcohol-free oil
Rationale: Sodium hypochlorite is a disinfectant.
Answer: B
12. The role of the dental assistant includes:
EXAM QUESTIONS AND CORRECT ANSWERS
(VRERIFIED ANSWERS) Q&A 2026|INSTANT
DOWNLOAD PDF
1. Which is the primary purpose of hand hygiene in a dental
setting?
A. Improve grip strength
B. Remove visible stains
C. Prevent cross-contamination
D. Reduce paperwork errors
Rationale: Hand hygiene reduces transmission of
microorganisms between patients and staff.
Answer: C
2. What is the correct PPE for routine dental procedures?
A. Gloves only
B. Mask and gloves only
C. Mask, gloves, protective eyewear
D. Gown only
Rationale: Standard precautions require full barrier protection.
Answer: C
3. The main function of saliva is to:
,A. Increase bacterial growth
B. Aid digestion and protect teeth
C. Harden enamel
D. Replace gingival fluid
Rationale: Saliva helps digestion and neutralizes acids.
Answer: B
4. Which instrument is used to examine teeth surfaces?
A. Explorer
B. Burnisher
C. Excavator
D. Condenser
Rationale: Explorer detects decay and surface irregularities.
Answer: A
5. Dental plaque is best described as:
A. Hardened calculus
B. A viral infection
C. Soft bacterial biofilm
D. Tooth enamel erosion
Rationale: Plaque is a sticky bacterial layer.
Answer: C
6. Which tooth surface faces the tongue?
,A. Buccal
B. Lingual
C. Occlusal
D. Distal
Rationale: Lingual surface is toward the tongue.
Answer: B
7. The universal numbering system starts with:
A. Upper left third molar
B. Upper right third molar
C. Lower right third molar
D. Lower left central incisor
Rationale: Tooth #1 is upper right third molar.
Answer: B
8. What is the function of fluoride?
A. Whitens teeth instantly
B. Prevents decay by strengthening enamel
C. Removes calculus
D. Destroys nerves
Rationale: Fluoride increases enamel resistance.
Answer: B
9. Which is a symptom of gingivitis?
, A. Tooth loss
B. Bleeding gums
C. Enamel fracture
D. Dry mouth only
Rationale: Gingivitis causes gum inflammation and bleeding.
Answer: B
10. Sterilization in dentistry is used to:
A. Clean surfaces only
B. Kill all microorganisms including spores
C. Remove stains
D. Reduce pain
Rationale: Sterilization eliminates all microbial life.
Answer: B
11. Which solution is commonly used for surface disinfection?
A. Saline
B. Sodium hypochlorite
C. Distilled water
D. Alcohol-free oil
Rationale: Sodium hypochlorite is a disinfectant.
Answer: B
12. The role of the dental assistant includes:
