Anterior superior alveolar nerve

The anterior superior alveolar​ nerve, also known as the anterior superior dental nerve, is the third branch of the infra-orbital nerve, from the maxillary division of the trigeminal nerve. It is the largest of the superior alveolar nerves and contributes to the superior dental plexus.

Gross anatomy

It arises from the infra-orbital nerve whilst in the infra-orbital canal just before it exits the infra-orbital foramen. It descends in the anterior wall of the maxillary sinus in the anterior superior alveolar canal and terminal dental branches enter the apical foramina at the dental roots.

The nerves supply the maxillary sinus, anterior maxillary oral mucosa, the incisor and canine teeth and the lower lateral nasal wall.