牙齿预备体参数化设计研究与实现  

Research and Implementation for Parametric Design of Tooth Preparation

作　　者：宋英龙[1] 戴宁[1] 许治[1] 孙玉春[2] 吕培军[2] 原福松[2] 

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]口腔数字化医疗技术和材料国家工程实验室 北京大学口腔医学院,北京100081

出　　处：《中国生物医学工程学报》2014年第1期71-78,共8页Chinese Journal of Biomedical Engineering

基　　金：国家科技支撑计划(2012BAI07B04);国家自然科学基金(51205192,81271181);南航科研基地创新基金(NJ20130015)

摘　　要：牙体预备是牙齿硬组织疾病治疗的关键环节。为开发新的牙齿预备操作模式并实现自动化预备体制备,研究了复杂形状、多约束牙齿预备体模型的计算机生成和参数化修改。首先,针对三角网格模型尺寸约束特点,通过分析模型尺寸链之间的关系,提出了预备体模型生成的参数化操作,通过此操作能够生成全瓷修复标准范围内的预备体模型;同时,利用基于历史的方法实现了预备体模型的参数化动态修改。磨牙和前磨牙各20例预备体参数化实验证明,此算法能够很好地完成预备体模型生成和参数化修改。通过第三方软件Geomagic Studio证实模型设计偏差在48μm以内,小于100μm的临床密合精度要求。为改革预备体临床操作模式,研发自动化牙体预备设备打下了坚实的基础。Tooth preparation is a key part in the treatment of dental hard tissue disease. In order to develop a new mode of tooth preparing operation and realize automatic preparation, in this paper, we studied the computer aided method of complex-shaped and multiple-constrained preparation generation and parametric modification. First, for the characterization of triangular mesh, we proposed parametric operations of preparation generation by analyzing the relationship of dimension chains. By the operations, an whole-eeramie preparation model within the standard was generated. Meanwhile, a history-based approach was used to realize the preparation＇ s dynamie modifieation. Twenty instances of molar and premolae showed that our method worked well in preparation＇ s generation and parametric modification. The model was conformed with maximum design deviation of 48 μm by the third-party software Geomagie Studio, reaching the elinical adhesion requirement of less than 100 μm.

关 键 词：预备体设计 离散数据建模 参数化操作 

分 类 号：R318[医药卫生—生物医学工程]