The premolar with the occlusal groove pattern that may simulate the letter "Y" is________________?
Correct answer: C. Mandibular second
- A. Maxillary first
- B. Maxillary second
- C. Mandibular second
- D. Mandibular first
Explanation
The three-cusp type of mandibular second premolar commonly has a Y-shaped occlusal groove pattern, formed by grooves radiating between the buccal and two lingual cusps. The mandibular first premolar more typically has a mesiolingual developmental groove rather than a true Y pattern.
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