DENTAL ASSISTING MN LICENSURE EXAM REVIEW
QUESTIONS WITH 100% CORRECT ANSWERS | ESTUDY
LATEST, ALL ANSWERED 100%
1. **What type of stain is present in chewing gum and mouth rinses?**
- A) Yellowish to green-brown
- B) Black
- C) Blue
- D) White
**Answer: A) Yellowish to green-brown**
2. **What are endogenous stains?**
- A) Stains from outside the tooth
- B) Stains that can be eliminated
- C) Stains that originate from within the tooth and cannot be removed
- D) Stains caused by food
**Answer: C) Stains that originate from within the tooth and cannot be removed**
3. **What are exogenous stains?**
- A) Stains from inside the tooth
- B) Stains that come from outside the tooth
- C) Stains that are white
- D) Stains from bacteria
**Answer: B) Stains that come from outside the tooth**
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4. **What are extrinsic stains?**
- A) Stains that cannot be eliminated
- B) Stains on the surface of the tooth that can be removed
- C) Stains that are permanent
- D) Stains caused by genetics
**Answer: B) Stains on the surface of the tooth that can be removed**
5. **What are intrinsic stains?**
- A) Stains from outside the tooth that can be eliminated
- B) Stains that are permanent because they are embedded in the tooth structure
- C) Stains from food
- D) Stains that are bright colors
**Answer: B) Stains that are permanent because they are embedded in the tooth structure**
6. **What characterizes a black stain?**
- A) Thin black line near the gum line
- B) Bright yellow spots
- C) Thick brown patches
- D) Green discoloration
**Answer: A) Thin black line near the gum line**
7. **What does a tobacco stain look like?**
- A) Light yellow
- B) Dark brown or black
- C) Bright red
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- D) White
**Answer: B) Dark brown or black**
8. **Where are brown or yellow stains most commonly located?**
- A) On the front teeth
- B) On the back teeth and lower front teeth
- C) On the gums
- D) On the tongue
**Answer: B) On the back teeth and lower front teeth**
9. **What do dental plaque agents cause?**
- A) Bright white spots
- B) Reddish-brown stains in certain areas
- C) Blue streaks
- D) No visible stains
**Answer: B) Reddish-brown stains in certain areas**
10. **What is Nasmyth's membrane?**
- A) A type of tooth enamel
- B) A stain from food residue on newly erupted teeth
- C) A dental tool
- D) A type of bacteria
**Answer: B) A stain from food residue on newly erupted teeth**
11. **What are natural rubber polishing cups?**
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- A) Hard cups that stain teeth
- B) Durable cups that do not stain teeth
- C) Cups made of metal
- D) Cups that break easily
**Answer: B) Durable cups that do not stain teeth**
12. **Who should use synthetic polishing cups?**
- A) Everyone
- B) Patients with latex allergies
- C) Patients with tooth sensitivity
- D) Patients with braces
**Answer: B) Patients with latex allergies**
13. **What is zirconium silicate suitable for?**
- A) Gold and tooth-colored restorations
- B) Only enamel
- C) Only gums
- D) None of the above
**Answer: A) Gold and tooth-colored restorations**
14. **What is tin oxide used for?**
- A) To eliminate stains from enamel and metallic restorations
- B) To whiten teeth only
- C) To clean gums
- D) To polish plastic
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