The mucosa of the mandibular lip and labial gingiva will be anesthetized following an inferior alveolar injection because the buccal nerve branches out laterally to supply these areas.

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In addition to the mandibular teeth,the inferior alveolar nerve block will anesthetize the lip and labial gingiva because the mental nerve branches out laterally from the inferior alveolar.Note that the mental nerve also supplies the skin of the lower lip and chin.The buccal nerve spreads out on the surface of the buccinator muscle and supplies the buccal mandibular gingivae posterior to the mental foramen.

The Mucosa of the Mandibular Lip and Labial Gingiva Will