In normal occlusion , with which grooves / surface of the permanent mandibular first molar does the mesiobuccal cusp of the permanent maxillary first molar occlude______________?
Correct answer: A. Mesiobuccal surface
- A. Mesiobuccal surface
- B. Mesial surface
- C. Distobuccal groove
- D. Transverse groove
Explanation
The mesiobuccal cusp of the maxillary first molar normally fits into the buccal groove region of the mandibular first molar, establishing the Class I molar relationship. Among the listed choices, the mesiobuccal surface is the intended description, although “buccal groove” would be more anatomically precise.
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