Hedemark A, Freihofer H P
J Maxillofac Surg. 1978 Nov;6(4):244-9. doi: 10.1016/s0301-0503(78)80100-3.
In 15 cases of ordinary Le Fort I osteotomy with simultaneous vertical displacement, the behaviour of the maxilla in respect to vertical movement was examined. It was observed that out of 12 maxilla which had been tilted downwards, 10 moved upwards again. One maxilla remained stable and another one moved further downwards. Of 3 cases with upward movement, two remained stable whereas one moved further upwards. Therefore, the authors conclude that the downward displacement especially is unstable and that one has either to overcorrect or search for possibilities of stabilization other than wiring suspension. Since these movements occur during postoperative intermaxillary fixation, no occlusal changes are observed.
在15例同时进行垂直移位的普通Le Fort I型截骨术中，研究了上颌骨在垂直移动方面的表现。观察到，在12例向下倾斜的上颌骨中，10例又向上移动。1例上颌骨保持稳定，另1例进一步向下移动。在3例向上移动的病例中，2例保持稳定，而1例进一步向上移动。因此，作者得出结论，尤其是向下移位是不稳定的，要么必须过度矫正，要么寻找除钢丝悬吊之外的稳定方法。由于这些移动发生在术后颌间固定期间，未观察到咬合变化。
