#28

3D Model

Diamond shaped occlusal outline. One very large (buccal) and small lingual cusp . The mesiolingual line angle is almost flat, while the distolingual line angle is rounded. This leads to a very narrow mesial surface and makes easy to identify if it is a left or right tooth. This tooth also presents an unique mesiolingual groove, which comes from the mesial pit, crosses the mesial marginal ridge into the mesiolingual line angle HOC: buccal - in the junction between the middle and cervical third; lingual - in the middle third, close to the lingual cusp apex; mesial and distal – between middle and occlusal thirds. The mesial root groove is common on this teeth. There are two prominent pits (mesial and distal), which can be used to differentiate these teeth from canines. These pits are the apexes for the mesial and distal fossae. The buccal and lingual triangular ridges are connected, creating an unique transverse ridge. These teeth also present a buccal ridge and may present the buccal development grooves.