摘要目的:探讨下颌角截骨联合高密度聚乙烯(MEDPOR)假体植入隆颏一次性面下部轮廓成形术的可行性及手术注意事项。方法:2010年6月至2016年8月，扬州市第一人民医院口腔颌面外科收治18例女性患者(年龄22～36岁，平均28岁)，均一次性完成下颌角截骨联合MEDPOR假体植入隆颏面下部轮廓成形术，定期随访并观察手术效果。结果:18例患者手术平均用时2 h，手术切口均一期愈合；除1例患者术后血肿致局部瘀斑2周消退外，其余患者术后1周出院。术后经2个月至3年随访，面部比例协调、双侧对称、口腔开闭运动及咀嚼功能正常，手术效果均满意。结论:下颌角截骨联合MEDPOR隆颏一次性面下部轮廓成形术安全有效。

abstractsObjective:To investigate the feasibility of mandibular angle osteotomy combined with high-density polyethylene (MEDPOR) prosthesis implantation for one-time lower facial contouring of the protuberance and related surgical precautions.Methods:A total of 18 patients who were treated in the oral and maxillofacial surgery of Yangzhou First People＇s Hospital from June 2010 to August 2016 were selected to complete the mandibular angle osteotomy combined with MEDPOR prosthesis implantation in the lower part of the prosthetic plane. The patients were followed up regularly and the effect of surgery was observed.Results:All 18 patients were operated successfully with an average time of 2 hours. The effect of operation was satisfactory. Except for one patient whose hematoma caused local bruise to subside completely in 2 weeks, all the others were discharged smoothly in one week after operation. After 2 months to 3 years of follow-up, the effect was satisfactory.Conclusions:Mandibular angle osteotomy combined with MEDPOR prosthesis is safe and effective.