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目的分析Activator功能矫治对髁突、关节盘的位置及盘髁关系的影响。方法选择20个AngleⅡ1错患者,在斜矢状位闭口MRI影像上测量Activator功能矫治前后髁突和关节盘位置的改变。结果在无症状AngleⅡ1错中有40%出现关节盘前移位,功能矫治前后其髁突和关节盘位置没有明显改变。结论Activator治疗不会改变髁突在关节窝中的位置,不会引起正常位置的关节盘前移位,也不会使已经存在的盘前移位复位。
Objective To analyze the effect of Activator functional correction on the condyle and disc position and the relationship between the disc and condyle. Methods Twenty patients with AngleⅡ1 malocclusion were selected and the changes of condylar and disc position before and after Activator functional correction were measured on oblique sagittal closed MRI images. Results Asymptomatic Angle Ⅱ 1 misdiagnosis occurred in 40% of the preoperative disc displacement, condyle and disc position before and after functional correction did not change significantly. Conclusion Activator treatment does not change the position of the condyle in the socket, nor does it cause an anterior dislocation of the joint in its normal position, nor does it reset an existing pre-plate shift.