三维数字化牙模的牙弓线探测(英文)  

Dental Arch Detection of 3D Dental Model

作　　者：袁天然[1] 廖文和[1] 戴宁[1] 崔海华[1] 王长伟[2] 俞青[3] 

机构地区：[1]南京航空航天大学机电学院357信箱,江苏南京210016 [2]空军工程大学,陕西西安710038 [3]南京市口腔医院,江苏南京210016

出　　处：《系统仿真学报》2008年第19期5332-5336,5341,共6页Journal of System Simulation

基　　金：National High Technology Research and Development Program of China (863 program) (2005AA420240);Jiangsu Key Science and Technology Project of China (GrantNo: BE2005014);Jiangsu Planned Projects for Postdoctoral Research (Grant No: 0701051B) ;Medical Science and Technology Development Program of Nanjing (ZKX0420)

摘　　要：提出了一种在三维数字化牙颌模型上直接探测牙弓线的方法。首先,根据给定的顶点法向和咬合面的夹角阈值过滤出初始特征点,并拟和得到初始牙弓线;其次,对初始特征点集进行等分并找出对应的局部最高顶点,对局部最高顶点进行拟和得到最终的牙弓线。通过对多副牙颌模型的实验表明,所提方法稳定、有效。A robust detection method for dental arch directly applied on 3D dental model was proposed which could be easily acquired through intra or extra oral measurement methods. Firstly, the initial dental arch was obtained through fitting the initial feature points filtered out according to the given threshold of the angle between the normal of the model point and the occlusal plane. Then the set of the initial feature points was divided into subsets using planes perpendicular to the initial dental arch with equal arch length between each two adjacent planes. The local peak point was found out for each subset according to the distance value between the point of the corresponding subset and the occlusal plane, and the curve fitting to the local peak points was also the final dental arch. The method was tested on models with various types of malocclusions and is proved to be robust and accurate.

关 键 词：牙弓线 三维数字化牙模 咬合面 牙弓线拟合 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]