Smile reanimation after Unilateral Facial Palsy by Lengthening Temporalis Myoplasty : Objective and Subjective Evaluation on 25 cases.

Comparison of functional results of Lengthening Temporalis Myoplasty (LTM) relies in current practice on subjective scales. The goal of this study was to define a simple, reproducible objective scale validated through a comparison with a subjective scale for smile symmetrization results after temporal muscle myoplasty. This retrospective study was conducted on 25 patients having an unilateral facial palsy and rehabilitated with LTM. Evaluation consisted in objectives measures (smile horizontal symmetry between left and right side dsmile vertical symmetry dV, and smile width on Healthy (Hs) and Paretic side (Ps) on pre- and postoperative photos. Subjective scales were also employed (numeric scale (NS) and Terzis and Noah scale (TNS)) by a jury (4 professionals and 4 non-professionals) and the patient himself. Each evaluation was performed in three conditions: at rest, intermediary and maximum smile. Comparison of objectives measures on the impaired side showed a postoperative improvement in the three conditions evaluation. Reproducibility of NS was weak (intraclass correlation coefficient ICC

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