Development of the CAD/CAM system for occlusal laminate veneer using the construction of occlusal curved surface

本研究采用计算机辅助设计/制造技术制备咬合贴面。采用高速牙颌模型测量系统对正常牙合和错牙合的受试者进行测量和分析。因此，我们可以通过多项式表示牙弓形状以及数值比较来定量评估形状的差异。另外，在进行贴面修复时，需要建立咬合平面。因此，我们采用非接触式三维测量系统来研究面部和牙列三维数据的统一。结果，我们成功地在0.3毫米的误差单位。利用该方法，可以定量分析面牙的物理关系，为贴面设计提供有用的数据。材料方面：A.采用三维有限元法对无金属全冠的强度进行分析，为单板的强度分析提供了基础数据

This study was done to prepare occlusal laminate veneer by CAD/CAM. We measured and analyzed the subjects of normal occlusion and malocclusion with using high speed measuring system for dental cast. As a result, we made it possible to evaluate the difference of the form in a fixed quantity with showing the dental arch form by polynomial expression as well as comparing numerical value. Furthermore, it is necessary to establish occlusal plane when we treat it with occlusal laminate veneer. Therefore, we use noncontact three-dimensional measuring system to study unification of three-dimensional data of face and dentition. As a result we succeed in unity in 0.3 mm error. By using this method, it became possible to analyze physical relationship of face and dentition in a fixed quantity and get a useful data of designing of laminate veneer. About materials A we analyzed the strength of metal-free crown by 3-D finite element analysis and got a basic data of strength analysis of laminate veneer