颅颌运动仿真系统（牙合）接触精度初探  

The accuracy of occlusal simulation of virtual craniofacial movement simulation system

作　　者：陈磊[1] 张豪[1] 冯海兰[1] 张驰[2] 张凤军[2] 

机构地区：[1]北京大学口腔医学院·口腔医院修复科,100081 [2]中国科学院软件研究所人机交互技术与智能信息处理实验室

出　　处：《中华口腔医学杂志》2010年第2期98-101,共4页Chinese Journal of Stomatology

基　　金：国家自然科学基金（60673188）;国家高技术研究发展计划（863计划,2006AA01Z328）

摘　　要：目的探讨颅颌运动仿真系统的（牙合）接触模拟精度，为该仿真系统的应用提供依据。方法制作10副石膏模型并上胎架。用（牙合）架模拟侧方运动，三维扫描侧方运动终点（牙合）架上的上下颌模型，重建数字化上下颌模型作为对照组。运用仿真系统模拟（牙合）架的侧方运动，以仿真系统输出的侧方运动终点的数字化上下颌模型为试验组。通过比较试验组与对照组下颌牙列之间的位置差异评价仿真系统的（牙合）接触模拟精度。结果仿真系统模拟的下颌牙列与对照组下颌牙列之间的绝对平均距离为（0．18±0．05）mm；在前后左右四个分区中，两组右后牙区之间的绝对平均距离最大，为（0．19±0．07）mm。结论该仿真系统的体外耠接触模拟精度为0．19mm。Objective To evaluate the accuracy of occlusal contacts simulated by virtual craniofacial movement simulation system, and to provide theoretical basis for its application. Methods Ten pairs of plaster dental casts were fabricated, and mounted on Kavo PROTA 7 articulator. Lateral movement was produced on the articulator. Then each pair of the casts on the articulator was scanned three dimensionally and used as the reference model. The movement of the articulator was simulated using the virtual craniofacial movement simulation system. Then, the digital casts were established on the simulation system and used as the test model. To evaluate the accuracy of the simulation system, positional differences between the simulated and the reference lower dentition were compared. Results The mean value of the absolute average distance between the simulated and reference lower dentition was （ 0. 18 ± 0.05 ） mm. Among the left, right, anterior and posterior areas of the dentition, the maximum mean value of the absolute average distance between the simulated and the reference model was found in the right posterior area, which was （0. 19 ± 0. 07 ） mm. Conclusions The in vitro accuracy of occlusal contacts simulated by virtual craniofacial movement simulation system is 0.19 mm, and this could be a reference data for the practical application of this system.

关 键 词：计算机 模拟 下颌运动 (牙合)接触 精度 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]