目的 探讨超声骨刀拔除下颌阻生智齿的效果.方法 根据下颌阻生第三磨牙拔除难度判断方案选择拔牙难度判断为较难的228颗下颌阻生智齿,分成实验组和对照组,每组114颗,实验组应用超声骨刀法拔牙,对照组采用凿骨劈冠法拔牙.对2组的拔牙时间、术后疼痛、张口受限、面部肿胀情况进行分析比较.结果 实验组平均拔牙时间为(16+5.2)min,对照组平均拔牙时间为(30±8.7)min.实验组的拔牙时间、术后疼痛、面部肿胀率及张口受限均低于对照组,两组间的差异均具有统计学意义(P<0.05).结论 超声骨刀法拔除下颌阻生智齿较凿骨劈冠法手术时间短,术后并发症轻.%Objective To study the effect of piezosurgery in the extraction of mandibular impacted third molars.rnMethods 228 mandibular impacted third molars with relative difficulty for extraction according to the scheme of derngree of difficulty for extraction were included in the study, and were divided into two groups (114 teeth each group):rnTest group (treated by piezosurgery), control group (treated by traditional chisel osteotomy). The surgery time and pain,rnrestriction of mouth opening and facial swelling after surgery, were evaluated in both groups. Results The average surrngery time was (16±5.2) min in test group and (30±8.7) min in control group. The surgery time, pain, facial swelling rnrate, and restriction of mouth opening were lower than control group (P＜0.05). Conclusion Compared with traditional rnchisel osteotomy, the average surgery time with piezosurgery was significantly shorter and the complications are obviously rnreduced.
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