Methods:129 cases of lower-thind-molar patients were divided into two groups, using high speed air turbing handpiece to grind and hammer &chisel to split the tooth and the alveolar bone respectively.

• 方法将129例下颌阻生智齿患者(牙)随机分成两组,分别用高速涡轮牙钻磨牙去骨法和锤凿劈牙去骨法拔除,记录手术时间和术后并发症情况,进行对比分析。