Objective:To evaluate the possibility of prevention of Frey's syndrome by reservation and reconstruction of parotid fascia in parotidectomy.Methods:Parotidectomy with parotid fascia reservation and reconstruction was conducted in 31 cases. 12 months-12 years after operation the patients were examined by Minor test.Result:Positive reaction of Minor test was observed in 3 out of the 31 cases(9.67%).Conclusion:A parotidectomy with reservation and reconstruction of parotid fascia can efficiently prevent Frey's syndrome.

Objective:To evaluate fixation effect of intermaxillary fixation screw.Methods:63 cases with mandibular fractures were treated with open reduction,and then internal fixation were managed with intermaxillary fixation using dental arch splint or intermaxillary fixation screw randomly.The operation time,postoperation periodontal index,mouth open degree,occluding relation and fracture healing were compared.Results:There was no significant difference upon occluding relation,fracture healing and mouth open degree under two treatment methods.Compared with dental arch splint fixation method,intermaxillary fixation screw had shorter operation time and better periodontal index.Conclusion:Intermaxillary fixation screw is a good intermaxillary fixation method because of short operation time.Furthermore,it can provide enough traction retention strength and easy to maintain oral hygiene.

Objective To evaluate whether it can prevent Frey's syndrome by reserving parotid fascia or reconstructing parotid fascia with sternocleidomastoid muscle and remaining of parotid fascia in parotidectomy. Methods Fifty-two patients undergoing parotidectomy with maintained and reconstructed parotid fascia were followed up. A test of chewing vitamin C slice guidance and iodine-amylum pilot was conducted for observing the incidence of postoperative Frey's syndrome. Results Flush with perspires was found only in 5 out of the 52 patients (9.61%), which was lower than the incidence after traditional parotidectomy. Conclusion The method of reserving and reconstructing parotid fascia with sternocleidomastoid muscle and remaining of parotid fascia in parotidectomy can efficiently prevent Frey's syndrome, and can also repair the hollow abnormity of the face.