The mandibular canines are the pointed teeth at the corners of the lower arch (Universal 27 on the right and 22 on the left, FDI 43 and 33). Each has a single cusp, slimmer than the upper canine, and a long single root that is occasionally split into labial and lingual parts. They erupt at about 9-10 years.
| Location | Corner of the lower dental arch, between the lateral incisor and the first premolar |
|---|---|
| Parts |
|
| Nerve Supply | Incisive branch of the inferior alveolar nerve (mandibular division of the trigeminal nerve); Mental nerve (labial gingiva); Lingual nerve (lingual gingiva) |
| Blood Supply | Incisive branch of the inferior alveolar artery |
| Venous drainage |
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| Lymphatic drainage |
|
Grip and tear food and help guide side-to-side jaw movement.
Their long roots make them very stable teeth, often the last to be lost and useful as anchors for dentures and bridges. The bone covering the front of the root is thin, so gum recession is common, particularly with orthodontic movement or hard brushing. The lower canine fits in front of and between the upper canine and first premolar in a normal bite.
Exposure of the root as the gum moves down, often on the prominent labial surface, causing sensitivity.
Wear of the cusp tip from grinding, flattening the tooth.
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