Texas Dental Assistant Practice Exam
Questions And Correct Answer with Rational
(100% verified answer) Q & A 2026 /
Instant download PDF
1. What is the primary function of saliva?
A. Strengthen enamel only
B. Aid digestion and protect teeth
C. Create plaque
D. Cause caries
Answer: B
Saliva helps digest food, neutralizes acids, and protects teeth from decay.
2. What is the hardest substance in the human body?
A. Dentin
B. Cementum
C. Enamel
D. Bone
Answer: C
Enamel is the hardest, most mineralized tissue in the body.
3. What instrument is used to remove calculus?
A. Explorer
B. Curette
C. Mirror
D. Excavator
,Answer: B
Scaler and curettes are used to remove plaque and calculus from teeth.
4. What does PPE stand for?
A. Primary Protective Equipment
B. Personal Protective Equipment
C. Patient Protective Equipment
D. Periodontal Protective Equipment
Answer: B
PPE refers to gloves, masks, gowns, and eyewear used for infection control.
5. The dental formula for adults is:
A. 16, 8, 16
B. 20, 10, 20
C. 32, 0, 32
D. 28, 4, 28
Answer: C
Adults typically have 32 permanent teeth.
6. What is the function of fluoride?
A. Whitens teeth
B. Prevents caries
C. Removes stains
D. Builds enamel structure only
Answer: B
Fluoride strengthens enamel and prevents tooth decay.
7. Which tissue surrounds the root of the tooth?
A. Enamel
B. Pulp
, C. Cementum
D. Dentin
Answer: C
Cementum covers and protects the root surface.
8. What is sterilization?
A. Cleaning visible debris
B. Killing all microorganisms including spores
C. Washing hands
D. Using mouthwash
Answer: B
Sterilization eliminates all microbial life forms.
9. Which cavity classification affects proximal surfaces of molars?
A. Class I
B. Class II
C. Class III
D. Class V
Answer: B
Class II cavities involve posterior teeth proximal surfaces.
10. The dental assistant primarily assists with:
A. Surgery only
B. Patient care and chairside assistance
C. Billing only
D. Prescribing medications
Answer: B
Dental assistants support dentists during procedures and patient care.
11. What is gingivitis?
Questions And Correct Answer with Rational
(100% verified answer) Q & A 2026 /
Instant download PDF
1. What is the primary function of saliva?
A. Strengthen enamel only
B. Aid digestion and protect teeth
C. Create plaque
D. Cause caries
Answer: B
Saliva helps digest food, neutralizes acids, and protects teeth from decay.
2. What is the hardest substance in the human body?
A. Dentin
B. Cementum
C. Enamel
D. Bone
Answer: C
Enamel is the hardest, most mineralized tissue in the body.
3. What instrument is used to remove calculus?
A. Explorer
B. Curette
C. Mirror
D. Excavator
,Answer: B
Scaler and curettes are used to remove plaque and calculus from teeth.
4. What does PPE stand for?
A. Primary Protective Equipment
B. Personal Protective Equipment
C. Patient Protective Equipment
D. Periodontal Protective Equipment
Answer: B
PPE refers to gloves, masks, gowns, and eyewear used for infection control.
5. The dental formula for adults is:
A. 16, 8, 16
B. 20, 10, 20
C. 32, 0, 32
D. 28, 4, 28
Answer: C
Adults typically have 32 permanent teeth.
6. What is the function of fluoride?
A. Whitens teeth
B. Prevents caries
C. Removes stains
D. Builds enamel structure only
Answer: B
Fluoride strengthens enamel and prevents tooth decay.
7. Which tissue surrounds the root of the tooth?
A. Enamel
B. Pulp
, C. Cementum
D. Dentin
Answer: C
Cementum covers and protects the root surface.
8. What is sterilization?
A. Cleaning visible debris
B. Killing all microorganisms including spores
C. Washing hands
D. Using mouthwash
Answer: B
Sterilization eliminates all microbial life forms.
9. Which cavity classification affects proximal surfaces of molars?
A. Class I
B. Class II
C. Class III
D. Class V
Answer: B
Class II cavities involve posterior teeth proximal surfaces.
10. The dental assistant primarily assists with:
A. Surgery only
B. Patient care and chairside assistance
C. Billing only
D. Prescribing medications
Answer: B
Dental assistants support dentists during procedures and patient care.
11. What is gingivitis?
