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目的观察片段弓技术联合改良Twin-block矫治器在替牙期安氏Ⅱ类2分类错中的矫治效果。方法对14例替牙期安氏Ⅱ类2分类错患者,先在上颌采用片段弓技术,再重建关系,采用改良Twin-block矫治器治疗。以X线头影测量分析法评价疗效。结果矫治后所有患者磨牙关系及尖牙关系均达到中性关系,覆、覆盖正常,面部外观明显改善。下颌骨向前调位,下面高增加。结论片段弓技术和改良Twin-block矫治器联合应用治疗替牙期安氏Ⅱ类2分类错效果理想。
Objective To observe the effect of segmental arch technique combined with modified Twin-block appliance on Class Ⅱ division 2 malocclusion during dentition. Methods Fourteen patients with Angle Class Ⅱ Division 2 malocclusion were treated with segmental arch technique in the maxilla and reconstruction of the relationship between them. The modified Twin-block appliance was used. X-ray cephalometric analysis to evaluate the efficacy. Results After treatment, the molar relationship and canine relationship in all patients reached a neutral relationship. The coverage was normal and the facial appearance was improved obviously. Mandibular forward adjustment, the following high increase. Conclusion Segmental arch technique and modified Twin-block appliance are effective in treating Class Ⅱ division 2 malocclusion.