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目的:对比分析穿颊器联合口内入路与传统口外切口入路治疗下颌骨后段骨折的疗效.方法:收集2014年3月~2017年9月收治的下颌骨后段骨折患者130例,随机分为实验组和对照组,每组65例.实验组接受穿颊器联合口内入路,对照组传统口外切口入路手术.对比两组患者术中术后疗效指标.结果:术后3月实验组65例患者中仅出现3例并发症,其余患者均完全恢复,无遗留疤痕;对照组则出现数例并发症,且61例留有疤痕.结论:穿颊器联合微创技术治疗下颌骨后段骨折中的疗效显著优于传统治疗方法.“,”Objective:To investigate the therapeutic effects between transbuccal instrument combining with intrao-ralincision and traditional extraoral incision for posterior mandibular fractures. Methods:From March 2014 to September 2017,there were 130 cases of posterior mandibular fractures enrolled in the department of oral and maxillofacial surgery.They were randomly divided into treatment group and control group,with 65 patients in each group.The patients in the experiment-group were conducted wear buccal device concurrent intraoral incision and in the control group conducted traditional extraoral incision.The postoperative efficacy was compared between two groups.Results:There were only 3 cases of complications in the treatment group of 65 patients in 3 months after operation,and the remaining patients were completely recovered with no remaining scar.There were several complications in control group,and 61 cases with scars.Conclusion:The effect of the wear buccal device combining with minimally invasive treatment on the treatment of posterior mandibular fracture was superior to that of traditional treatment.