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目的 讨论正常者与错者在下颌极限运动时、咀嚼运动及磨牙时 ,髁突在矢状向与水平向移动的运动轨迹。方法 正常 2 2人 ,Angle分类的AngleⅡ1错 2 2人、AngleⅡ2 错 19人 ,AngleⅢ错 2 1人 ,应用计算机化的髁突运动轨迹仪 (CAD1AX)记录开闭口运动、前伸运动、左右侧方运动、咀嚼以及磨牙时髁突的运动轨迹 ,测量髁突矢状方向最大移动量 ,侧方 (水平 )最大移动量 ,最大旋转量。结果 1)AngleⅡ1组 ,前伸后退运动时矢状向最大移动量明显大于正常组。 2 )AngleⅡ2 组前伸运动时的侧方移动量显著增大。 3)AngleⅡ1组左侧方运动时 ,平衡侧髁突的侧方移动量显著增加。 4 )AngleⅡ2 组 ,左侧方移动平衡侧髁突的侧方移动量明显增加。 5 )AngleⅡ2 组咀嚼时 ,磨牙时髁突侧方移动量增加。 6 )AngleⅢ组前伸运动时矢状向最大 ,移动量显著减小。结论 AngleⅡ2 病人组在极限运动与功能运动时 ,侧方运动量显著增加。揭示AngleⅡ2 组的颞颌关节韧带松弛比例高。
Objective To discuss the motion trajectory of condyles in the sagittal and horizontal directions during the maxillary maximal exercise, chewing and molars in normal subjects and wrong persons. The method was normal 2 2 people, Angle classification of Angle Ⅱ 1 wrong 22 people, Angle Ⅱ 2 wrong 19 people, Angle Ⅲ wrong 2 1 people, the use of computerized Condyle Motion Tracker (CAD1AX) record opening and closing mouth movement, , Left and right side of the movement, chewing and molar movement of the condylar process, measuring the maximum amount of sagittal movement in the sagittal direction, lateral (horizontal) maximum displacement, maximum rotation. Results 1) In AngleⅡ1 group, the maximal sagittal shift of forearm was significantly greater than that of normal group. 2) AngleⅡ2 group of forearm movement sideways movement increased significantly. 3) In the left side of AngleⅡ1 group, the amount of lateral movement of condyles increased significantly. 4) AngleⅡ2 group, lateral movement of the left side of the balance movement side of the condyle increased significantly. 5) When AngleⅡ2 group chewing, the amount of lateral movement of condyle increased during molars. 6) Angle Ⅲ group sagittal movement to reach the maximum, the amount of movement was significantly reduced. Conclusion Angle Ⅱ 2 patients in extreme exercise and functional exercise, lateral movement increased significantly. Reveal Angle Ⅱ 2 group of temporomandibular joint ligament laxity high.