国产口腔修复CAD-CAM系统的研究与开发

目的 开发具有我国自主知识产权的口腔修复体的计算机辅助设计与辅助制作系统。方法 利用自行研制的3轴三维激光扫描仪获取全牙列28颗标准牙冠的形态数据。利用Matlab 5.3作为数据处理和程序开发平台，对数据进行处理，同时在牙冠表面定义特征区和特征点并进行各种变换和调整。用Surfacer10.5作为开发平台，进行修复体设计程序的研究与开发。用国产3.5轴的数控加工设备进行修复体加工。结果 建立了国人28颗标准牙冠的三维图形数据库。开发了咬合形态调整和修改程序。初步实现了冠修复体的计算机辅助设计全过程并完成了其计算机辅助制作的全过程。结论 本项实验系统的研制成功表明，我国学者已掌握了口腔修复CAD－CAM的基本理论、数学描述、技术和制造工艺。为进一步的产业化开发奠定了基础。

The research and development of CAD-CAM system in restorative dentistry

Objective To develop a dental CAD/CAM system with the autonomic intellectual property. Method 28 standard teeth crowns were scanned using a newly 3 D laser scanner. As a development platform the Matlab 5.3 were used to process the acquired data, also be used to define the characterized areas on the surfaces of the crowns and to change the crowns form. The software of Surfacer 10 5 to develop a new CAD software for fixed prosthetics, and the 3 5 axis numerical controlled machine to manufacture the prosthetics were used. Result It is the first time, the 3D graphic data bank of Chinese teeth crowns with a standard form was established. A software of the occlusal adjustment and the form modification were developed. It is also the first time, the authers realized the whole process to use the CAD CAM for the manufacture of a crown. Conclusion The successful result shows, that we have already mastered well the base theory, the mathematics method, the technology of a CAD CAM system. It provides the basics for the future development.