一种基于数字化牙颌模型的三维咬合分析方法

目的:探索一种通过扫描带有空间位置关系的上、下颌模型,进行咬合接触三维分析的方法.方法:采用牙颌模型三维激光扫描仪及专用上、下颌模型定位装置,获取牙尖交错位空间位置关系的上、下颌模型三维点云数据,在逆向工程软件中重建咬合关系,进行三维咬合接触面积的测量,并与咬合纸、光学咬合分析的结论进行比较.结果:使用扫描重建的牙尖交错位状态模型测量出了三维咬合接触面积,与咬合纸、光学咬合分析的结果比较无显著区别,初步实现了"计算机虚拟咬合纸"的功能.结论:本研究的咬合分析方法准确性好,测量精度高,并有很好的发展潜力,为评价咬合接触状态提供了一种新的技术手段.

A method for three-dimensional analysis of occlusal contacts from digital dental casts

Objective: The study was to investigate the occlusal contacts with a set of dental casts based on their three-dimensional models in the intercuspal position. Methods: 3D point-clouds of the dental casts in the intercuspal position were acquired by D.02-L-3D scanner with a special casts-locating device, and reconstructed . The areas of occlusal contacts were calculated, and were further compared with the results from the methods of articulating paper and photocclusion technique. Results: There was no significant difference in the result of occlusal contacts analysis between the 3D reconstructive mea-surement and articulating paper or photocclusion technique. The virtual articulating paper was also preliminarily carried out in this research. Conclusion: The study verified the reliability of the measurement for occlusal contacts by the 3D digital model, and may lead to a new way for occlusal contacts research.