The maxillary canines are the pointed eye teeth at the corners of the upper arch (Universal 6 on the right and 11 on the left, FDI 13 and 23). Each has a single sharp cusp and the longest root of any tooth, which forms a ridge (the canine eminence) under the upper lip. They erupt at about 11-12 years.
| Location | Corner of the upper dental arch, between the lateral incisor and the first premolar |
|---|---|
| Parts |
|
| Nerve Supply | Anterior superior alveolar nerve (from the infraorbital nerve, maxillary division of the trigeminal nerve); Nasopalatine nerve (palatal gingiva); Superior labial branches of the infraorbital nerve (labial gingiva) |
| Blood Supply | Anterior superior alveolar artery (from the infraorbital artery) |
| Venous drainage |
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| Lymphatic drainage |
|
Grip and tear food, guide the jaw in side-to-side movements and support the corners of the lips and face.
Upper canines are the most commonly impacted teeth after the third molars, usually stuck in the palate; early detection around age 10 allows the baby canine to be removed to help the adult tooth erupt. Their long roots make them very stable, so they are kept whenever possible and are important abutments for bridges. In many people they guide the jaw sideways so the back teeth separate during side-to-side movement (canine guidance).
The canine fails to erupt and stays in the palate or under the cheek, often needing surgical exposure and orthodontic traction.
An ectopic canine pressing on the neighbouring lateral incisor can dissolve its root.
Wear of the cusp tip from grinding (bruxism), flattening the canine and reducing canine guidance.
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