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目的比较Twin-Block矫治器治疗安氏Ⅱ类1分类错患者前后软组织的变化。方法 14例替牙晚期或恒牙早期下颌发育不足为主的安氏Ⅱ类1分类错患者用Twin-Block矫治器进行早期治疗,用Burstone分析法对比治疗前后头颅侧位片软组织变化。结果治疗后侧貌趋于平直,开唇露齿好转。结论 Twin-Block矫治器治疗安氏Ⅱ类1分类错,治疗后患者侧貌明显改善。
Objective To compare the changes of soft tissue in patients with Class Ⅱ division 1 malocclusion treated with Twin-Block appliance. Methods Fourteen patients with advanced Class Ⅱ division 1 malocclusion with mandibular hypoplasia who developed early or late permanent teeth were treated with Twin-Block appliance. The Burstone analysis was used to compare the soft tissue changes of the cephalometric lesion before and after treatment. Results after treatment, the profile tends to be straight, open teeth and teeth improved. Conclusion The Twin-Block appliance has been used to treat Class Ⅱ division 1 malocclusion. The appearance of the patients is obviously improved after treatment.