目的：观察Twin block 矫治器矫治恒牙初期安氏Ⅱ类错牙合的效果。方法：在临床随机选择20 名安氏Ⅱ类错牙合用Twin block 矫治器进行矫治，以X 线头影测量分析法评价疗效。结果：Twin block 矫治器可促进下颌生长；同时引起上切牙舌倾，下切牙唇倾。结论：Twin block 矫治器可产生明显的生长改良效果。%Objective:To evaluate the effect of of twin block appliance in the early treatment of class Ⅱ malocclusion.Methods:20 cases with class Ⅱ malocclusion were treated with Twin block appliance.Cephalometric analysis was used to evaluate the effects.Results:The twin block appliance could stimulate the growth of mandible and lead to retrocline of the upper incisors and procline of the lower incisors.Conclusion:The twin block appliance can achieve remarkable effects of growth modification of dentognathic system.
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