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Home › Body Atlas › Organs › Maxillary Canine
Organ Head & Skull

Maxillary Canine

dens caninus superior

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.

Anatomical Data

Structure & Supply

LocationCorner of the upper dental arch, between the lateral incisor and the first premolar
Parts
  • Crown
  • Single cusp tip
  • Mesial and distal cusp ridges
  • Labial ridge
  • Prominent cingulum
  • Palatal ridge
  • Single long root (longest in the mouth)
  • Canine eminence over the root
  • Enamel
  • Dentin
  • Pulp chamber
  • Root canal
  • Cementum
  • Periodontal ligament
Nerve SupplyAnterior 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 SupplyAnterior superior alveolar artery (from the infraorbital artery)
Venous drainage
  • Superior alveolar veins to the pterygoid venous plexus
Lymphatic drainage
  • Submandibular nodes
  • Deep cervical nodes
Biomechanics

Function & Actions

Grip and tear food, guide the jaw in side-to-side movements and support the corners of the lips and face.

Clinical Relevance

Clinical Notes

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).

Pathology

Common Injuries & Conditions

Impacted Maxillary Canine

The canine fails to erupt and stays in the palate or under the cheek, often needing surgical exposure and orthodontic traction.

Root Resorption of the Lateral Incisor

An ectopic canine pressing on the neighbouring lateral incisor can dissolve its root.

Attrition

Wear of the cusp tip from grinding (bruxism), flattening the canine and reducing canine guidance.

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