# 6

3D Model

U Canine: Incisal surface is dominated by a cusp, with its cusp apex centered to the long axis of the tooth.This tooth presents a cusp ridge, divided into a shorter mesial cusp ridge and a longer distal cusp ridge. The incisal surface also has a mesioincisal and a distoincisal angles, both rounded. The mesiobuccal line angle is sharp from incisal to cervical, whereas the distobuccal line angle starts sharp at the incisal and becomes rounded close to the cervical (most reliable way to distinguish mesial from distal).The cingulum is very developed. It makes the canine wider buccolingually than mesiodistally. The lingual surface also presents the cingulum, mesial and distal marginal ridges. But also presents a lingual ridge, which extends from the cusp apex to the cingulum, splitting the lingual fossa into a mesial lingual fossa and a distal lingual fossa.This tooth has its mesial flatter and wider than the distal, from an incisal view.This tooth presents a very noticeable notch at the CEJ on the facial surface.