ARIZONA DENTAL ASSISTANT CERTIFICATION
EXAM QUESTIONS WITH CORRECT ANSWERS
AND RATIONALES LATEST 2025-2026 EXAM
UPDATE
1. What is the primary purpose of dental plaque control?
A. To whiten teeth
B. To prevent oral disease
C. To strengthen fillings
D. To repair enamel
Correct Answer: B. To prevent oral disease
Rationale: Plaque contains bacteria that contribute to dental caries and
periodontal disease. Effective plaque control helps prevent these
conditions.
2. Which tooth surface faces the tongue?
A. Buccal
B. Mesial
C. Lingual
D. Distal
Correct Answer: C. Lingual
Rationale: The lingual surface is the side of a tooth facing the tongue.
3. What does OSHA stand for?
,A. Occupational Safety and Health Administration
B. Oral Safety Health Agency
C. Occupational Sterilization Health Authority
D. Office of Safety and Health Accreditation
Correct Answer: A. Occupational Safety and Health Administration
Rationale: OSHA establishes workplace safety standards, including
infection control requirements in dental offices.
4. Which instrument is commonly used for removing supragingival
calculus?
A. Explorer
B. Curette
C. Sickle scaler
D. Burnisher
Correct Answer: C. Sickle scaler
Rationale: Sickle scalers are specifically designed to remove
supragingival calculus deposits.
5. The universal precautions concept assumes:
A. Only sick patients carry disease
B. Children are disease-free
C. All patients may carry infectious diseases
D. Gloves are unnecessary
Correct Answer: C. All patients may carry infectious diseases
Rationale: Universal precautions require treating all blood and body
fluids as potentially infectious.
, 6. Which tooth is normally the first permanent tooth to erupt?
A. Maxillary canine
B. First molar
C. Lateral incisor
D. Second premolar
Correct Answer: B. First molar
Rationale: Permanent first molars generally erupt around age six.
7. What is the normal adult dentition?
A. 20 teeth
B. 24 teeth
C. 28 teeth
D. 32 teeth
Correct Answer: D. 32 teeth
Rationale: Adults normally have 32 permanent teeth, including third
molars.
8. Which item is considered personal protective equipment (PPE)?
A. Handpiece
B. Mouth mirror
C. Gloves
D. Composite resin
Correct Answer: C. Gloves
EXAM QUESTIONS WITH CORRECT ANSWERS
AND RATIONALES LATEST 2025-2026 EXAM
UPDATE
1. What is the primary purpose of dental plaque control?
A. To whiten teeth
B. To prevent oral disease
C. To strengthen fillings
D. To repair enamel
Correct Answer: B. To prevent oral disease
Rationale: Plaque contains bacteria that contribute to dental caries and
periodontal disease. Effective plaque control helps prevent these
conditions.
2. Which tooth surface faces the tongue?
A. Buccal
B. Mesial
C. Lingual
D. Distal
Correct Answer: C. Lingual
Rationale: The lingual surface is the side of a tooth facing the tongue.
3. What does OSHA stand for?
,A. Occupational Safety and Health Administration
B. Oral Safety Health Agency
C. Occupational Sterilization Health Authority
D. Office of Safety and Health Accreditation
Correct Answer: A. Occupational Safety and Health Administration
Rationale: OSHA establishes workplace safety standards, including
infection control requirements in dental offices.
4. Which instrument is commonly used for removing supragingival
calculus?
A. Explorer
B. Curette
C. Sickle scaler
D. Burnisher
Correct Answer: C. Sickle scaler
Rationale: Sickle scalers are specifically designed to remove
supragingival calculus deposits.
5. The universal precautions concept assumes:
A. Only sick patients carry disease
B. Children are disease-free
C. All patients may carry infectious diseases
D. Gloves are unnecessary
Correct Answer: C. All patients may carry infectious diseases
Rationale: Universal precautions require treating all blood and body
fluids as potentially infectious.
, 6. Which tooth is normally the first permanent tooth to erupt?
A. Maxillary canine
B. First molar
C. Lateral incisor
D. Second premolar
Correct Answer: B. First molar
Rationale: Permanent first molars generally erupt around age six.
7. What is the normal adult dentition?
A. 20 teeth
B. 24 teeth
C. 28 teeth
D. 32 teeth
Correct Answer: D. 32 teeth
Rationale: Adults normally have 32 permanent teeth, including third
molars.
8. Which item is considered personal protective equipment (PPE)?
A. Handpiece
B. Mouth mirror
C. Gloves
D. Composite resin
Correct Answer: C. Gloves
