Periodontics · single question
Which tooth classically has a developmental concavity on its mesial surface, predisposing that area to localized plaque accumulation and periodontal risk?
Show answer and explanation
Correct answer: A. The maxillary first premolar
The maxillary first premolar has a well-known developmental concavity/groove on its mesial surface, which can act as a localized plaque trap and contribute to periodontal breakdown in that area if oral hygiene is inadequate.