一种集成头影测量和颅颌面重建的颌面外科模拟器
A simulator for maxillo-facial surgery integrating cephalometry and orthodontia
摘要：
目的：本文介绍了一种新的模拟颌面外科手术，它收集了牙科和颌面分析一起到一个单一的计算机辅助程序。该想法首先是通过引入应用于患者颅骨的3D虚拟模型的3D头影测量来提出上颌骨的重新定位。然后，正畸数据集成到这个模型中，这要归功于牙齿石膏模型的光学测量。材料和方法：首先在干燥颅骨上评估颌面演示器的可行性。为了模拟畸形（从而模拟“真实”患者），外科医生修改并手动切割颅骨，以生成给定的颌面畸形（矢状面、额状面和轴向面不对称）。结果如下：我们的模拟器的验证包括评估其提出骨重新定位诊断的能力，该诊断将使颅骨处于其原始配置。本文提供了第一个定性验证，在重新定位诊断中有1.5 mm的误差。结论：这些结果主要验证了颌面数值模拟器的概念，集成了三维头影测量，并保证正确的牙齿咬合。
英文摘要：
Objectives : This paper presents a new simulator for maxillo-facial surgery, that gathers the dental and the maxillo-facial analyses together into a single computer-assisted procedure. The idea is first to propose a repositioning of the maxilla, via the introduction of a 3D cephalometry, applied to a 3D virtual model of the patient's skull. Then, orthodontic data are integrated into this model, thanks to optical measurements of teeth plaster casts. Materials and Methods : The feasibility of the maxillo-facial demonstrator was first evaluated on a dry skull. To simulate malformations (and thus to simulate a "real" patient), the skull was modified and manually cut by the surgeon, in order to generate a given maxillo-facial malformation (with asymmetries in the sagittal, frontal and axial planes). Results : The validation of our simulator consisted in evaluating its ability to propose a bone repositioning diagnosis that will put the skull as it was in its original configuration. A first qualitative validation is provided in this paper, with a 1.5-mm error in the repositioning diagnosis. Conclusions : These results mainly validate the concept of a maxillo-facial numerical simulator that integrates 3D cephalometry and guarantees a correct dental occlusion.
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