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目的:探讨用涡轮机分段切割法拔除下颌中、低位阻生的第三磨牙的效果及适应证。方法:对481例675颗曲面体层片显示中、低位阻生的下颌第三磨牙用涡轮机分段切割法拔除。其中327颗实施二段切割法;348颗实施三段切割法。结果:下颌阻生第三磨牙均完全拔除;手术时间5~20 min(平均16 min);术后发生短暂下唇麻木症状3例(3颗),发生术后感染15例(15颗)。结论:二段切割法适用于中位近中阻生的下颌第三磨牙,三段切割法适用于中/低位近中、水平阻生的下颌第三磨牙。
Objective: To investigate the effect and indications of the third molars implanted in the lower and middle mandibular sites with segmented cutting method. Methods: A total of 481 cases with 675 curved surface slices showed that the lower third impacted mandibular third molars were removed by segmented cutting method. Among them, 327 implements the second-stage cutting method and 348 implements the third-stage cutting method. Results: The third mandibular impacted mandibular molars were completely removed. The operation time was 5-20 minutes (average 16 minutes). Three cases (3 cases) of short lower lip numbness occurred after operation and 15 cases (15 cases) postoperative infection. CONCLUSION: The two-segment incision method is suitable for the mandibular third molars with moderate and near-midnatal impaction. The three-segment incision method is suitable for the mandibular third molars with medium / low level proximal and distal impaction.