口腔预备体颈缘线的快速提取  

Rapid Extraction of Dental Preparation Line

作　　者：戴宁[1] 周永耀[2] 袁天然[1] 俞青[3] 廖文和[1] 孙全平[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]苏州六六视觉科技股份有限公司,江苏苏州215005 [3]南京市口腔医院修复科,江苏南京210008

出　　处：《华南理工大学学报（自然科学版）》2008年第5期128-134,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：教育部博士点基金资助项目(20070287055);江苏省科技攻关项目(BE2005014);江苏省博士后科研资助项目(0701051B);江苏省数字化制造技术重点建设实验室开放课题(HGDML-0609)

摘　　要：预备体颈缘线的提取技术是保证口腔CAD/CAM修复体边缘密合性的重要环节,对修复体质量和牙周组织健康至关重要.文中提出了一种口腔牙齿预备体颈缘线半自动提取算法.该算法首先对三角网格上的离散曲率进行分析,估算了网格点的曲率值,然后利用"方向"追踪方法快速提取初始特征线,再利用"曲率"吸引策略保持能量最小的方法优化网格特征线.应用实例表明,文中算法是有效的、可行的.The extraction of dental preparation line is one of the key steps that affects the marginal adaptation in dental CAD/CAM and is very important to the restoration quality and the protection of periodontal tissues.This paper proposes a semi-automatic extraction algorithm of dental preparation line.In this algorithm,the discrete curvature of the triangle mesh in the dental model is analyzed and estimated,and an initial preparation line is extracted by means of the direction tracking method.Then,the initial preparation line is optimized by means of the ＂curvature attraction＂ based on the minimum energy principle.Case study demonstrates that the proposed algorithm is effective and feasible.

关 键 词：预备体颈缘线 口腔CAD/CAM 轮廓检测 

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]