The shape of the occlusal surface of the permanent maxillary first molar is___________?
Correct answer: D. Rhomboidal
- A. Oval
- B. Trapezoidal
- C. Triangular
- D. Rhomboidal
Explanation
Viewed from the occlusal aspect, the maxillary first molar has a rhomboidal outline produced by the oblique ridge and the distolingual taper. This shape distinguishes it from the more rectangular mandibular molars.
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