A study of computer-aided-design (CAD) simulation for orthognathic surgery.

正颌外科手术计算机辅助设计（CAD）模拟的研究本研究的目的是开发一个正颌外科手术计算机辅助设计模拟器。本系统能为临床提供计算机图形学的视觉交流服务，其结果如下：（1）回顾性分析了与CAD模拟器连接的手术病人资料，作为手术模拟程序的数据集。(2)根据海报-前部和侧部头影测量片创建三维骨骼形状。这种重建的面部骨骼图像可以帮助操作者容易地修改各种类型的截骨手术，从包含许多标志性的方面。(3)利用多光源激光设备，将硬组织、常规X线头颅摄影和软组织相结合，建立了颌面部三维模型，并应用交互式计算机图形技术，实现了颌面部三维可视化图像的手术模拟。(4)这种逼真的图形图像可用于手术计划和预测术后面部外观。

A study of computer-aided-design (CAD) simulation for orthognathic surgery.The purpose of this study is to develop a computer-aided-design simulator for orthognathic surgical procedures. This deviced system can afford a service of visual communication by using computer graphic techniques in ordinary clinical practice.The results obtained during the past two years are as follows :(1) The operated patients' data were reviewed retrospectively which were linked to CAD simurator as a data set (s) for surgical simulation programs.(2) A three dimensional skeleton form is created from the posters-anterior and lateral cephalogrammetric films. This reconstructed facial skeleton image can aid the operator easily to modify various types of osteotomy procedures from the containing numerous landmark facets.(3) A three dimensional maxillo-facial model is also developed by combining the hard tissue, rising conventional cephalograms and the soft tissue, using multislit laser apparatus.The visual three dimensional maxillo-facial image can be used as a surgical simulation by application of the interactive computer graphic techniques.(4) This realistic graphic images can be used for surgical planning and predicting the post-operative facial appearance.