正常牙尖交错位咬合接触的动态研究

Dynamic Study on The Occlusal Contacts in Intercuspal Position

目的 动态分析牙尖交错位 (ICP)咬合接触变化规律。 方法 采用 T- Scan 系统 ,记录 2 5名正常者最大咬合力的 ICP咬合过程 ,对咬合数据统计分析。 结果 对受试者最大力状态下接触点数目的三次重复测量的结果差异无显著性 (P>0 .0 5 )。咬合力随时间变化曲线呈 S型。随咬合力增加 ,前牙和后牙的接触点数目都增多。 结论 T- Scan 系统传感器具有很高的重复性。 ICP咬合随着咬合力增大 。

Objective To intestigate the rules of the occlusal contacts in intercuspal position in mobile. Methods Occlusions of maximal bite force were recorded in intercuspal position by T-Scan Ⅱ system from 25 subjects with normal intact dentition. The statistic analysis was made. Results There was no statistic difference(P>0.05) among three occlusal records with T-Scan Ⅱ system. The curves of bite force changed with time and showed S pattern. Occlusal contacts of anterior teeth and posterior teeth in intercuspal position increased with the bite force increasing. Conclusion The T-Scan Ⅱ system showed acceptable reproducibility. The more bite force,the more occlusal stability.;