Duclos P, Freidel M, Mayeux J F, Durand J
Service de Stomatologie, Chirurgie maxillo-faciale et chirurgie plastique de la face, Centre Hospitalier Lyon-Sud, Pierre-Bénite.
Rev Stomatol Chir Maxillofac. 1991;92(6):368-72.
The authors expand their method of cephalometric simulation, which was designed for maxillofacial surgeons performing orthognathic surgery. This method has been developed to make up for the insufficiencies of the usually available cephalometric simulations, ie. poor legibility and the lack of data that may be necessary for surgery. The authors only deal with CS on profile teleradiographs at the end of the orthodontic preparation. This method utilizes models cut out of colored polyester and representing the profile of the maxillary and mandible. All the possible movements of the skeletal parts can also be simulated and the analysis of their direction and amplitude is possible, as is, more importantly, the influence of vertical movements of the maxillary on the mandible due to the mandibular autorotation phenomenon. This method is essential to accurately assess the degree of differential impaction or egress of the mandible in the region of the incisors and of the molars, according to the accompanying movements of the mandible moving around the condyle. Examples illustrate the use of this simulation method in the various types of orthognathic surgery. Finally, the authors point out the limitations of the method and the complementary usefulness of anteroposterior cephalometric simulation and of gnathologic simulation on casts, in particular for osteotomies for the transverse direction and for asymmetria.
作者扩展了他们的头影测量模拟方法，该方法是为进行正颌手术的颌面外科医生设计的。开发这种方法是为了弥补通常可用的头影测量模拟的不足，即清晰度差以及缺乏手术可能所需的数据。作者仅在正畸准备结束时处理侧面远距射线照片上的头影测量。该方法利用从彩色聚酯材料上切割下来的模型，这些模型代表上颌骨和下颌骨的侧面轮廓。骨骼部分的所有可能运动也都可以模拟，并且可以分析其方向和幅度，更重要的是，由于下颌自动旋转现象，还可以分析上颌垂直运动对下颌的影响。根据下颌围绕髁突的伴随运动，该方法对于准确评估下颌在切牙和磨牙区域的差异截骨或移位程度至关重要。实例说明了这种模拟方法在各种类型正颌手术中的应用。最后，作者指出了该方法的局限性以及前后位头影测量模拟和模型上的颌学模拟的互补作用，特别是对于横向截骨和不对称情况。
