烤瓷冠基底冠模型重构方法研究  

Study on model reconstruction of base of porcelain fused to metal crown

作　　者：张翔[1] 廖文和[1] 俞青[2] 安涛[1] 焦益群[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]南京市口腔医院修复科,江苏南京210008

出　　处：《东南大学学报（医学版）》2006年第1期1-5,共5页Journal of Southeast University(Medical Science Edition)

基　　金：国家高技术研究发展计划(863计划)资助项目(2005AA420240);南京市医学科技发展计划资助项目(ZKX0420)

摘　　要：以右下颌第一恒磨牙为例探讨烤瓷冠基底冠模型重构过程及相关算法。首先用AtosⅡ光学坐标测量仪采集右下颌第一恒磨牙预备体石膏模型表面的数据点,构造基底冠内表面的三角网格模型。然后使用自行开发的软件对三角网格模型进行四边界区域划分,拟合得到分片光滑的B样条曲面,重构基底冠的内表面。之后在基底冠内表面的基础上设计全颈环基底冠实体,并使用小型高速铣床制作有机玻璃全颈环基底冠的实物,验证基底冠重构算法的实用性。Taking the mandibular first molar for instance, the reconstruction of base of porcelain fused to metal crown are deeply studied in this paper. Firstly, we scan the data points of the molarg preparation surface with Atos Ⅱ, the optical coordinate instrument, and build the triangular meshes model of the surface in the base. Secondly, by using the software independently developed , the meshes are partitioned into quadrangular areas and the inner surface of the base composed of patches of smooth surfaces is reconstructed. Finally, the base entity with full collar is designed based on the reconstructed surface and is made of organic glass with mini high-speed NC milling machine, which verifies the surface reconstruction algorithm.

关 键 词：牙齿模型重构 烤瓷冠基底冠 牙齿计算机辅助设计与制造 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术] R783.3[自动化与计算机技术—计算机科学与技术]