Sensory nerve, lower jaw teeth.

Supplies front upper teeth sensation.

The middle superior alveolar nerve or middle superior dental nerve is a nerve that drops from the infraorbital portion of the maxillary nerve to supply the sinus mucosa, the roots of the maxillary premolars, and the mesiobuccal root of the first maxillary molar.

Innervates molars, maxillary sinus area.

Supplies sensation to lower jaw.