Incisive part

The incisive part (Pars incisiva) of the mandible holds the incisive teeth and the canine tooth, when it exists. Flatenned from back to front and oriented vertically in Men, it is on the contrary flatenned dorsoventrally and nearly longitudinal in animals.

It presents a lingual surface (Facies lingualis), concave and smooth, continued laterally by the medial surface of the molar part, and a labial surface (Facies labialis), convex from side to side, more extended than the previous one, continued by the lateral surface of the molar part*,

On the median plane, it has a more or less extended rough surface (Symphyseal surface) that unites to the opposite mandible through an intermandibular synchondrosis (Synchondrosis intermandibularis) or suture, according to the species.

*These two surfaces are connected by the alveolar arch (Arcus alveolaris), the dorsal curved free border that is carved by the alveoli of the incisive and canine teeth. It is continued caudally, especially in herbivorous species, by the interalveolar margin (Margo interalveolaris), an interdental space