#3

3D Model

Tooth #3 typically has four major cusps: mesiobuccal, distobuccal, mesiolingual, and distolingual. The mesiolingual cusp is the largest and tallest, while the distolingual cusp is the smallest.

A fifth cusp, the Cusp of Carabelli, is often present on the lingual surface of the mesiolingual cusp. The occlusal outline is rhomboidal, and a prominent oblique ridge connects the mesiolingual and distobuccal cusps. The buccal surface displays two cusps divided by a buccal groove. Tooth #3 has three roots: mesiobuccal, distobuccal, and palatal, with the palatal root being the longest and most prominent. The roots are well separated and provide strong anchorage. The buccal height of contour is in the cervical third, and the lingual height of contour is in the middle third. The mesial contact is more occlusal than the distal contact.