Digastric transposition for unilateral lower lip weakness after injury to the marginal mandibular nerve

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Abstract

Lower-lip dysfunction creates functional and cosmetic issues for patients. The loss of the depressor vector is especially noticeable during laughter and open-mouth smiling. Although a variety of options exist for improving this deficit, most patients are not offered any surgical therapy. The digastric muscle transposition, popularized by Conley, remains a valuable procedure for this deficit.

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