Middle Superior Alveolar Nerve — MFDS Part 1 MCQ

Instant feedback + full explanation. One question, done properly.

ModerateAnatomy (Head & Neck)Middle Superior Alveolar NerveMFDS Part 1

During dissection, a small and variably present branch is identified descending from the infraorbital nerve and joining the superior dental plexus. Which permanent teeth are most characteristically supplied by this middle superior alveolar nerve?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Maxillary first and second premolars

The middle superior alveolar nerve, when present, is most characteristically associated with pulpal innervation of the maxillary premolars and contributes to the superior dental plexus. It may also contribute to the maxillary first molar, but dissection evidence shows that this contribution is variable, so it should not be presented as obligatory. The posterior superior alveolar nerve predominantly supplies the maxillary molars, whereas the anterior superior alveolar nerve supplies the incisors and canine. Mandibular premolars are supplied through the inferior alveolar nerve. The middle superior alveolar nerve is frequently absent, with its territory then covered through overlapping branches of the superior dental plexus; therefore, a single fixed absence percentage is inappropriate.

Reference: Heasman PA. Clinical anatomy of the superior alveolar nerves. British Journal of Oral & Maxillofacial Surgery. 1984;22(6):439-447. https://pubmed.ncbi.nlm.nih.gov/41797295/