Infraorbital canal

Infraorbital canal is a significant anatomical structure in the maxilla, one of the facial bones. It is a part of the infraorbital rim and is closely related to the eye socket or orbit. The infraorbital canal carries the infraorbital nerve, a branch of the maxillary nerve, which is itself a division of the trigeminal nerve.

Etymology

The term "infraorbital" is derived from Latin, with "infra" meaning "below" and "orbital" referring to the orbit or eye socket. Thus, "infraorbital" refers to the location of the canal below the orbit.

Anatomy

The infraorbital canal begins at the infraorbital groove, a depression in the maxilla. It runs superiorly and medially within the maxilla, eventually opening onto the face at the infraorbital foramen. The canal carries the infraorbital nerve, artery, and vein.

Infraorbital nerve

The infraorbital nerve is a branch of the maxillary nerve, which is itself a division of the trigeminal nerve. It provides sensory innervation to the lower eyelid, upper lip, and part of the nasal cavity.

Infraorbital artery and vein

The infraorbital artery and vein run alongside the infraorbital nerve within the canal. They supply blood to and drain blood from the lower eyelid, upper lip, and part of the nasal cavity.

Clinical significance

Knowledge of the infraorbital canal's anatomy is crucial in several medical and dental procedures. For example, an infraorbital block, a type of local anesthesia, involves injecting anesthetic into the infraorbital canal to numb the area it supplies.

See also

• Maxilla
• Infraorbital foramen
• Infraorbital nerve
• Infraorbital artery
• Infraorbital vein
• Trigeminal nerve
• Maxillary nerve

References

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