传统方法：高速涡轮机联轴器经常要采用紧配螺栓，而紧配螺栓的安装和拆卸都非常麻烦。
Old Method: High speed turbine couplings often utilize fitted bolts which can be difficult to install and remove.
目的：探讨高速涡轮机在辅助拔牙，特别是在下颌近中低位及水平位阻生牙的拔除中的优越性。
Objective:To investigate the superiority by using high speed air turbine drill in extraction of impacted mandibular teeth, especially in low mesioangular impaction and horizontal impaction.
方法：对150例应用高速涡轮机辅助拔牙的临床观察，与传统的锤凿法相对比，观察其手术时间及术后反应的情况。
Methods: 150 cases of turbine drill -assisted extraction were compared with orthodox chisel in their reaction after surgical time and the situation of complication.
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