A Digital System for Complete Denture
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摘要: 为了取代全口义齿传统经验型的手工制作方法,将数字化技术与中性区理论相结合,研发了全口义齿的数字化设计系统.该系统附带完全类型的人工牙数据库,采用“人工牙库=人工牙三维模型库+患者个性生物特征库”的知识结构描述方法,不仅重建了三维牙模,而且增了点、轴、坐标系等生理特征几何基准,建立起人工牙与选牙、排牙决策方案的相关性.排牙时,系统基于无牙颌模型的曲率特征,自动创建上前牙、下前牙、上后牙、下后牙的排牙线,同时制定了区域参数化排牙法则,实现了人工牙在排牙线上的个性化就位.最后基于特征曲面造型法,完成基托的设计.本系统以SCOLL语言为平台开发,界面友好,在任意设计阶段都可穿插人机交互,实现了个性、自动而又不失人性化的数字化设计流程.Abstract: The complete denture produced by traditional method is heavily relied on the skill and experience of the technician, with low quality and low effectiveness.A digital design system for complete denture that integrated technology and prosthodontical in neutral zone is described in this paper.The complete database is developed, including 3D artificial teeth models and geometrical features.Through extracting features on models of edentulous jaws, the system can automatically construct four teeth arrangement curves and create the orientation coordinate systems for every artificial tooth.Then the system can calculate the displacement matrix and realize teeth arrangement in teeth arrangement curves, after matching geometrical features of artificial teeth with orientation coordinate systems.The mixed modeling technology that blends triangle mesh and NURBS is implemented in base plate.The digital system is obtained based SCOLL with user-friendly human-computer interface and may become a new avenue for complete denture design.
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Keywords:
- complete denture /
- neutral zone /
- digitalization /
- computer aided design
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