正常牙尖交错位咬合的T-Scan Ⅱ系统分析

The evaluation of intercuspal occlusion of healthy people with T-Scan Ⅱ system

目的：观察正常人群从下颌姿势位向牙尖交错位闭合时咬合接触的情况及其与时间的关系。方法：利用T-Scan Ⅱ扫描系统对30位咬合关系正常,没有肌功能紊乱和颞下颌关节紊乱病的受试者进行咬合检查,记录其咬合力分布情况、咬合接触时间。采用SAS 9.0软件包对数据进行统计学分析。结果：受试者在牙尖交错位状态下记录的两侧咬合力量分布无显著性差异（P=0.3242）;受试者牙尖交错位时的咬合力占累积最大[牙合]力的百分比平均为96.89%,可信区间为90.88%－100%;平均咬合接触时间为（0.2015±0.086）s,两者无相关性（P〉0.05）。结论：咬合力中心的位置、牙尖交错位时的咬合力与累积最大力的差值、咬合接触时间均可作为临床上判断咬合是否健康的指标,亦可应用于咬合治疗疗效的评判。

PURPOSE： To observe the occluding movement from mandibular postural position to intercuspal position in healthy people.METHODS： The occluding movement in 30 healthy people from mandibular postural position to intercuspal position was recorded by T-Scan Ⅱ system.The distribution of occlusal force,the center of force,the percentage of intercuspal position occlusal force in Max force and the occlusion time was analyzed by T-Scan Ⅱ system and SAS 9.0 software package.RESULTS： The results showed that there was no significant difference between the occlusal force of the two sides under the intercuspal position mode（P=0.3242）.The average percentage of intercuspal position occlusal force in Max force was 96.89%.The confidence interval（CI） was 90.88%-100%.The average occlusion time was（0.2015±0.0861）s.There was no correlation between the occlusion time and the percentage of intercuspal position occlusal force in Max force.CONCLUSIONS： We could introduce the position of the center of force,the percentage of intercuspal position occlusal force in Max force and the occlusion time to estimate the occlusal condition,and to judge the effect of occlusal therapy.