单侧唇裂手术设计的几何学解析

目的：探讨Ｍｉｌｌａｒｄ法与Ｔｅｎｎｉｓｏｎ－Ｒａｎｄａｌｌ法在单侧唇裂修复手术中蕴藏的几何学原理。方法：对两法的手术设计进行详细的几何学解析。结果：Ｍｉｌｌａｒｄ法的特点是在水平方向上，将能使裂隙两侧唇峰点旋转下降的轴心点距唇峰点较远；而Ｔｅｎｎｉｓｏｎ－Ｒａｎｄａｌｌ法则是在垂直方向上，将能使裂隙侧唇峰点旋转下降的轴心点形成的位置较低。

Geometrical Analysis of Operative Designs in Unilateral Cleft Lip Repair

OBJECTIVE: To study the differences in geometric principle in cleft lip repair between Millard and Tennison-Randall's method. METHODS: The moving patterns of the peaks of cupid's bow along the cleft on both sides varied according to the operative designs respectively. On the above basis, the larger vertical distance that the peaks of cupid's bow would drop in both operative designs respectively, which were calculated under the similar clinical conditions. RESULTS: It was found that the most obvious characteristic in Millard's design is to make the rotational axle on both cupid's bow peaks along the cleft drop farther away on the horizontal direction. However the Tennison-Randall's characteristic is to make the center of the rotational axle as near as possible to the cupid's bow peaks on the vertical direction. CONCLUSION: It is concluded that Millard's design conforms to the requirement of reconstructing the lip on the physiological aspect, but Tennison-Randall's design complies more on the geometric principles, which is the reason why both methods of cleft lip repair can not be replaced by each other. And this study will make both kinds of operation designs be applied clearly and easily.