All of the premolars usually have a transverse ridge that crosses an occlusal developmental groove EXCEPT one.Which one is the EXCEPTION?

Question

Quizplus · Accepted Answer

While variation in anatomic grooves varies significantly,the mandibular first premolars are the only premolars that often have a transverse ridge that does not cross an occlusal developmental groove.In this tooth the mesial developmental groove extends from the mesial fossa lingually,between the mesial marginal ridge and the lingual cusp,and onto the lingual surface.

All of the Premolars Usually Have a Transverse Ridge That