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The mental nerve is a sensory nerve of the face. It is a branch of the posterior trunk of the inferior alveolar nerve, itself a branch of the mandibular nerve , itself a branch of the trigeminal nerve. It provides sensation to the front of the chin and the lower lip, as well as the gums of the anterior mandibular teeth. It can be blocked with local anaesthesia for procedures on the chin, lower lip, and mucous membrane of the inner cheek. Problems with the nerve cause chin numbness.
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