37 cases were treated with oscillating saw in A group;39 cases were treated with right angle bur in B group . All cases were performed through intraoral approach.
A组37例，全部应用传统的摆动锯进行下颌角截骨术；B组39例，全部应用直角钻打孔法截骨，即在下颌角的预设截骨线上打一排全层穿通的小孔，然后用骨凿凿下要切除的下颌骨。
参考来源 - 口内入路应用直角钻打孔法截骨和摆动锯截骨矫治下颌角肥大的比较研究—《中国美容医学》—2008年第10期—龙源期刊网·2,447,543篇论文数据，部分数据来源于NoteExpress
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