In maxillary 1st permanent molar, the 2 obtuse angles are________________?
Correct answer: C. Distofacial and mesiolingual
- A. Mesiolingual and mesiofacial
- B. Mesiofacial and distolingual
- C. Distofacial and mesiolingual
- D. Distofacial and mesiofacial
Explanation
The occlusal outline of the maxillary first molar is rhomboidal, with acute mesiobuccal and distolingual angles and obtuse mesiolingual and distobuccal angles. Therefore, the obtuse pair is distofacial and mesiolingual.
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