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本文采用ｘ线头影测量分析手段，研究２８例下颌前突伴上颌发育不足的双颌畸形患者同期外科矫正术后，颜面软硬组织标志点在水平方向上的变化规律，结果显示：采用ＬｅＦｏｒｔＩ型骨切开前徙术和下颌支斜行骨切开后退术矫治双颌畸形后，其颜面软组织标志点伴随相应硬组织标志点，依据一定的比率和回归方程进行改变，但其移动比率与单颌手术有所不同，尤其在唇部。因此，在对双颌外科进行ＶＴＯ分析时，不能简单地将单颌手术的软硬组织移动比率分别计算，而应考虑上下颌手术的相互作用对颜面软组织变化的影响
In this paper, 28 cases of maxillary hypoplasia with mandibular prognathism with maxillary hypoplasia were studied in 28 cases of patients with orthognathic surgery after surgical correction, facial soft and hard tissue markers in the horizontal direction of the change rule, the results show: the use of LeFortI type According to a certain ratio and the regression equation, the facial soft tissue markings were corrected with the index of hard tissue, but the ratio of the movement to the single Jaw surgery is different, especially in the lip. Therefore, when performing VTO analysis of bilateral jaw surgery, the ratio of the movement of the soft tissue and the hard tissue of the maxilla surgery can not be calculated separately, but the influence of the interaction between the maxilla and mandibular surgery on the changes of facial soft tissue should be considered