ObjectiveTo investigate the clinical effect of partial temporal muscle flap transposition (PTMFT) for patients with late incomplete facial paralysis.MethodsA total of 15 patients (12 females and 3 males, aged 26~53 years old with an average of 32.2±8.6 years) who underwent PTMFT from Jan 2015 to Jan 2017 were collected. All the patients suffered from late incomplete facial paralysis after acoustic neuroma surgery. The degrees of mouth angle distortion were evaluated according to the Terzis scale before and after PTMFT, and their complications were studied.ResultsAll the patients were followed up for 12 to 24 months postoperatively. The postoperative static score (1.00± 0.00) was significantly lower than the preoperative one (2.73± 0.46) (P<0.001), and the postoperative dynamic score (3.93± 1.03) was significantly higher than the preoperative one (2.00± 0.00) (P<0.001). In addition, no temporal depression was observed in all the patients, and a small number of the patients developed slight swelling at the zygomatic arch.ConclusionPTMFT can be used as an effective treatment for patients with late incomplete facial paralysis after acoustic neuroma surgery.