摘要
目的:观察早接触部位对下颌开闭口运动中下颌切点运动轨迹的影响,并探讨其意义。方法:应用ArcusDigMa三维下颌运动轨迹描记仪,检查下颌切点的运动轨迹随早接触部位变化而发生的改变,分析早接触部位与下颌切点在矢状轴、垂直轴、水平轴上的运动轨迹的相关性,建立直线回归方程。结果:随着早接触部位后移,下颌切点在矢状轴的运动距离有增大趋势,在垂直轴的运动距离有减小趋势,在水平轴有向非干扰侧偏斜的趋势,并且在垂直轴上得到早接触部位与下颌切点运动距离直线回归的混合效应模型:y^=34.7095-0.1590x1,δ=0.5549,P<0.001。结论:随着早接触部位的后移,下颌开口运动轨迹向后、向早接触点对侧偏斜,同时开口度减小,且在垂直轴方向的改变随着早接触部位的后移,呈现一定的线性规律。
PURPOSE： The purpose of this study was to observe the effect of the position of premature on track of mandibular incisal point during opening movement. METHODS： The changes of the track of mandibular incisal point along with the change of premature position were recorded by Arcus DigMa mandibular moving track analysis system. The relativity between the premature position and mandibular incisal point moving track on arrowy axis, vertical axis and horizontal axis was analyzed. Regression analysis was used for linear correlation between premature position and mandible opening moving track. RESULTS： The results showed that along with the retrusion of premature, the moving distance of mandibular incisal point tended to increase on arrowy axis, while decrease on vertical axis and lean to the contralateral side on horizontal axis. The linear regression equation of mandibular incisal point moving distance on vertical axis along with the premature position was： y=34.7095-0.1590x1,δ=0.5549,P〈0.001. CONCLUSION： The position of premature influenced the track of mandibular incisal point during opening movement significantly. With the retrusion of premature, the mandible opening moving track tended to be more posterior and shifting to the contralateral side, and the opening dimension tended to decrease. There was linear correlation between premature position and mandible moving track on the vertical axis. Supported by Shanghai Leading Academic Discipline Project Number（Grant No. T0202）
出处
《上海口腔医学》
CAS
CSCD
2006年第4期356-359,共4页
Shanghai Journal of Stomatology
基金
上海市重点学科(特色学科)建设项目(T0202)
关键词
早接触
下颌运动
运动轨迹
Premature
Mandibular movement
Moving track
