一种牙冠预备体三维数字化模型的就位倒凹检测方法  

A Preliminary Method to Detect Undercut in Tooth Preparation for Crown Based on Three Dimensional Digital Model

作　　者：刘思璇[1] 吕培军[1] 孙玉春[1] 赵一姣[1] 王勇[1] 

机构地区：[1]北京大学口腔医学院口腔医院口腔计算机应用中心,北京100081

出　　处：《科学技术与工程》2011年第14期3165-3167,3171,共4页Science Technology and Engineering

基　　金：国家科技支撑计划课题(2009BAI8IB02)资助

摘　　要：基于三维扫描和逆向工程技术,研究牙冠预备体就位倒凹的检测及量化方法。在教学用标准牙列石膏模型上,对左侧上颌第一磨牙进行全瓷冠牙体预备。用牙颌模型三维激光扫描仪获取牙冠预备体三维点云数据,在交互提取牙冠预备体特征边缘线的基础上建立就位倒凹检测柱面。结果从牙冠预备体三维数字化模型,得到了就位倒凹的量化指标。说明应用逆向工程软件,初步建立了一种牙冠预备体就位倒凹的定量检测方法。To obtain the quantitative parameter of undercut in tooth preparation for crown,based on the 3D scanning and reverse engineering（RE） technique,tooth 26 in the standard gypsum model was prepared for all-ceramic crown.The three-dimensional data of the prepared tooth was acquired by D700 Scanner.The feature margin lines were extracted interactively,and the undercut-detecting surface was established based on the margin lines.By point clouds analysis,the quantitative parameter of undercut was obtained.It is conclused that based on reverse engineering software,this study establish a preliminary method to detect undercut in tooth preparation for crown.

关 键 词：预备体 牙冠 倒凹 计算机辅助 三维 

分 类 号：R783.3[医药卫生—口腔医学]