下颌角外板截除矫治高角形下面部轮廓过宽

Correction of high gonial angle-square jaw with mandibular outer cortex ostectomy

目的探讨一种安全有效的高角形下面部轮廓过宽缩小术式。方法对17例高角形下面部轮廓过宽的患者施行了口内入路下颌角外板上部（松质部）矢状劈除＋下颌外板下部（致密部）磨削的矫治方法。结果所有患者均无下颌内板意外裂断或被劈除，经6～12个月随访，患者双下颌角间距明显缩小，下颌升支与体部的角度变化不大，下颌角形态自然。结论该方法不仅有效缩小了下面部轮廓过宽，而且术后下颌角的外观自然，是矫治高角形下面部轮廓过宽的理想方法。

Objective To study a safe and effective way of correction of high gonial angle-square jaw with mandibular outer cortex ostectomy. Methods A total of 17 patients （ aged 19 ～ 28 years） with the high gonial anglesquare jaw were performed operation with mandibular outer cortex ostectomy through intraoral approach. A superior part （spongy part） of cortical bone was sectioned by the electric bone bur and chisel, and inferior part （ compact part） grinding of cortical plate bone was underwent with the bistrIque. Results All cases not happened internal plate bone accident split and the wound was healed well. After 6～12 months followup, the bigonial distance was effectively reduced, the gonial angle was not change and the lateral configuration was natural Conclusion This method is an ideal one at present because it effectively reduces the lower face width of patient with high gonial auglesquare law and it retains the natural profile of the mandible.