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目的:研究Twin-block矫治器对于替牙期、恒牙早期安氏Ⅱ类错的矫治作用。方法:应用Twin-block矫治器对处于替牙期、恒牙早期的安氏Ⅱ类下颌后缩患者11例进行矫治,通过治疗前后的X线光影测量变化来判断其疗效。结果:患者戴用Twin-block矫治器3-8个月后,咬合关系获得明显改善;侧貌协调;前牙覆覆盖正常。结论:Twin-block矫治器是治疗下颌后缩畸形的高效矫治器之一,只要病例选择恰当,就能恢复正常咬合功能及面貌美观的疗效。
Objective: To study the effect of Twin-block appliance on the correction of Class Ⅱ malocclusion in primary dentition and permanent dentition. Methods: Twelve patients with Angle Class Ⅱ mandibular retrusion who were in the period of primary dentition and permanent dentition were treated with Twin-block appliance. The curative effect was evaluated by the change of X-ray light before and after treatment. Results: Patients wearing Twin-block appliance 3-8 months later, the relationship was significantly improved bite; lateral coordination; anterior cover covered normal. Conclusion: The Twin-block appliance is one of the most effective appliances for the treatment of mandibular retrusion deformity. As long as the patient is properly selected, the normal occlusion function and the beautiful appearance can be restored.