目的 研究下颌前伸运动过程中，干扰发生部位对髁突运动轨迹的影响。方法 在50名志愿者的一侧下颌牙面制作人工咬合高点模拟干扰，利用Arcus DigMa三维下颌运动轨迹描记系统记录下颌前伸运动过程中两侧髁突在矢状轴、垂直轴和水平轴上的运动轨迹，分析咬合高点部位与两侧髁突运动轨迹的相关性，尝试建立直线回归方程。结果 随着咬合高点部位的后移，干扰侧髁突在矢状轴和垂直轴上的运动距离无明显规律，而非干扰侧髁突在矢状轴和垂直轴的运动距离均有逐渐加大的趋势；在水平轴上，双侧髁突均有向干扰侧偏斜的趋势。线性相关分析得到咬合高点部位与非干扰侧髁突在矢状轴上的运动距离的直线回归混合效应模型：=6.911 6+0.042 07x1－0.030 25x2（δ=0.085 19，P<0.001）；在垂直轴上的直线回归混合效应模型：=4.205 0+0.046 07x1（δ=0.035 79，P<0.001)。结论 前伸干扰影响髁突的运动轨迹，双侧髁突均向干扰侧偏斜，其中非干扰侧髁突的运动轨迹改变呈现线性规律。

Objective To observe the effect of position of occlusal disturbance on condyle track during protrusive movement. Methods Fifty volunteers were selected, and the condyle track along with the changing of occlusal disturbance position was recorded by Arcus DigMa three dimensional mandibular moving track analysis system. The relationship between occlusal disturbance position and condyle track on arrowy axis, vertical axis and horizontal axis was explored, and linear regression equations were established. Results Along with the retrusion of occlusal disturbance, the movement distance of contralateral condyle on vertical axis and horizontal axis tended to increase. The condyle track of both sides on horizontal axis during protrusive movement leaned to the ipsilateral side along with the retrusion of occlusal disturbance. The linear regression equation of contralateral condyle movement distance on arrowy axis along with the occlusal disturbance position was  =6.9116+0.04207x1-0.03025x2  δ=0.08519 （P<0.001）.  The linear regression equation of contralateral condyle movement distance on vertical axis along with the occlusal disturbance position was =4.2050+0.04607x1   δ=0.03579 (P<0.001). Conclusion The position of occlusal disturbance may influence the condyle track during protrusive movement. The condyle track of both sides may lean to the ipsilateral side of occlusal disturbance, and the condyle track of contralateral side of occlusal disturbance exhibits linear characteristics.