A distinguishing characteristic of a maxillary first premolar that identifies it as right or left is the________________?
Correct answer: C. Mesial inclination of the lingual cusp
- A. Height of the lingual cusp
- B. Flattened area beneath the contact on the distal surface
- C. Mesial inclination of the lingual cusp
- D. Greater length of the mesial cusp ridge on the lingual cusp ( AIPG- 98)
Explanation
The lingual cusp of the maxillary first premolar is characteristically inclined or positioned mesially, allowing the mesial side to be identified. The distal surface concavity is useful for recognising the distal aspect but is less reliable for determining right versus left.
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