Smile Outcomes When Using Masseteric Nerve-based Nerve Transfers versus Direct Muscle Neurotization in Facial Palsy Patients.

Two patients in the nerve transfer group (22%) and three of the eleven patients (27%) in the direct neurotization group had preexisting synkinesis, with no worsening synkinesis in the nerve transfer group and increased synkinesis in the direct neurotization cohort, which did not reach statistical significance. 7 Comparing preoperative versus postoperative scores after nerve transfer neurotization, there was a significant improvement in the median overall Sunnybrook scores [24 versus 47, P = 0.043, 95% confidence interval (CI) 0.058–0.068], Sunnybrook lip elevation (1 versus 2, P = 0.046, 95% CI: 0.119–0.132), Sunnybrook smile component (1 versus 3, P = 0.003, 95% CI 0.001–0.003), and Terzis scores (1 versus 3, P = 0.005, 95% CI 0.002–0.004).

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