Practice Quiz

ADA NBDE National Board Dental Part I

Category - NBDE

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Which of the following statements is true regarding “smooth surface caries”?
  1. This type of decay (diamond-shaped) usually occurs in deep fissures/grooves on top of the surface of the tooth
  2. The broad area of decay is on the surface side of enamel, while the narrow end is toward the dentin
  3. The narrow end or apex of the triangle points to the surface side of enamel
  4. The type of decay is diamond shaped
Explanation
Answer: B - Smooth surface caries occur on the surface of a tooth without pits, fissures or enamel faults, usually below a contact area between two teeth. The broad area of decay (base of triangle) is on the surface side of enamel, while the narrow end is toward the dentin.
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