Abstract: Objective: To compare the clinical effects of sternocleidomastoid muscle flap and oral repair membrane in the repair of facial sunken deformities and the prevention of Frey syndrome after parotid surgery. Methods: Eighty patients with benign tumor of parotid gland, which were carried out in the Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Jilin University were randomly divided into three groups: skin flap group, repair membrane group, and control group. The skin flap group was repaired with sternocleidomastoid muscle flap on the basis of parotid surgery, the repair membrane group was filled with oral repair membrane on the basis of parotid surgery, and the control group received normal parotid surgery without other treatments. The patients were followed up 72 hours and 6 months after operation, and the differences of facial depression deformity, Frey syndrome, and neck-shoulder dyskinesia were observed. Results: The facial depression deformity in the skin flap group was better than those in the repair membrane group and the control group (P<0.05). Compared with the control group, the flap group and the repaired membrane group could effectively prevent the occurrence of Frey syndrome, and the flap group had better preventive effect (P<0.05). In this experiment, there was no accessory nerve injury in the skin flap group. Conclusion: Sternocleidomastoid muscle flap has better repair and preventive effect than oral repair membrane in postoperative parotid benign tumor, which is worth popularizing and applying in clinic.

Key words: parotid gland tumor, sternocleidomastoid muscle, oral repair membrane, facial depression deformity, Frey syndrome