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The intramandibular course of the inferior alveolar nerve.

Few accounts of systematic dissections of the inferior alveolar nerve have been published since Olivier's study (1927) of 50 mandibles. He found that in 30 of these the mandibular canal contained the whole of the inferior alveolar neurovascular bundle, while in the remaining 20 the vessels and branches of this bundle were spread out so that a distinct canal was not present. Starkie & Stewart (1931) described five dissections, in each of which the main nerve divided into (1) an alveolar branch, responsible for the formation of an alveolar plexus supplying the molar and premolar teeth and possibly the canines, and (2) a branch passing forwards to supply the mental region and the incisor teeth. They also stated that in the posterior two-thirds of their intramandibular course the inferior alveolar nerve and vessels were surrounded by a sheath of compact bone, and a tough thick layer of connective tissue. Starkie & Stewart referred briefly to the work of Olivier (1927), only to contradict his findings. We therefore determined to dissect, in detail, the inferior alveolar nerve in the ramus and posterior part of the body of the mandible, in order to resolve the discrepancies between the previously published accounts.