Dental A distinguishing characteristic of a maxillary first premolar that identifies it as right or left is the: A Height of the lingual cusp B Mesial inclination of the lingual cusp C Flattened area beneath the contact on the distal surface D Greater length of the mesial cusp ridge on the Lingual cusp 💡 Explanation A distinguishing characteristic of a maxillary first premolar that identifies it as right or left is the: ✓ Correct Answer: B. Mesial inclination of the lingual cusp