Computer aided stitching approach for dental restoration models  

计算机辅助口腔修复体模型的缝合算法(英文)

作　　者：袁天然[1] 戴宁[1] 程筱胜[1] 廖文和[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《Journal of Southeast University(English Edition)》2009年第3期330-334,共5页东南大学学报（英文版）

基　　金：The National High Technology Research and Development Program of China(863 Program)(No.2005AA420240);the Key Science and Technology Program of Jiangsu Province (No.BE2005014)

摘　　要：According to the bio-characteristics of the lower and upper cavity surfaces of dental restoration, a stitching approach is proposed based on a virtual zipper working mechanism and a minimization of the surface total curvature energy, which is used to resolve the stitching problems existing during computer-aided design for dental restorations. First, the two boundaries corresponding to the lower and upper surfaces are triangulated based on the zipper working mechanism to generate the initial stitching surface patch, of which the edges are distributed uniformly between the boundaries. Secondly, the initial stitching surface patch is subdivided and deformed to reconstruct an optimized surface patch according to the bio-characteristics of the teeth. The optimized surface patch is minimally distinguishable from the surrounding mesh in smoothness and density, and it can stitch the upper and lower cavity surfaces naturally. The experimental results show that the dental restorations obtained by the proposed method can satisfy both the shape aesthetic and the fitting accuracy, and meet the requirements of clinical oral medicine.针对计算机辅助口腔修复体设计中的缝合问题,根据修复体腔底表面和上表面的生物医学特征,提出了一种基于拉链啮合机制和最小化全曲率能量函数的缝合算法.该算法首先采用由局部最优化权值驱动的虚拟拉链,对修复体腔的底表面和上表面边界进行拉合,得到对应的初始缝合曲面片.其次,对初始缝合曲面片进行细分优化,并根据牙齿的生理医学特性,对缝合曲面片进行变形调整,构造出符合实际生理医学特征的缝合曲面片,实现修复体腔底表面和上表面的光滑连续缝合.实验结果表明,利用所提方法设计出的修复体在形态和配合精度上,均能满足临床口腔医学要求.

关 键 词：dental restoration model stitching subdivision and deformation virtual zipper 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]