目的：探讨Twin Block矫治器联合直丝弓矫治器非拔牙矫正AngleⅡ类错牙合的疗效。方法选取Angle Ⅱ类患者16例，在不拔牙的情况下使用Twin Block矫治器联合直丝弓矫治器对其矫治，治疗前后拍摄头颅侧位片进行X线头影测量分析。结果所有患者在（18±2.0）个月完成主动矫正治疗，治疗后下颌前移、建立了Ⅰ类磨牙尖牙关系，覆合覆盖正常，下颌后缩患者矫治效果明显，容貌得到改善。治疗后X线头影测量分析显示：SNB平均增大3.25°，SNA 基本不变，ANB 平均减小6.50°，IMPA 平均减小6.95°，FMIA 平均增大3.61°，FMA 平均增大2.53°，Po-Co平均增大5.12 mm，Vits平均减小1.29 mm （P<0.05）。结论 Twin Block功能性矫治器联合直丝弓矫治器矫正早期AngleⅡ类错牙合效果明显，患者满意，值得临床推广。%Objective To investigate the efficacy of Twin Block appliance combined with straight wire appliance in the correction of AngleⅡ malocclusion. Methods Sixteen patients with Angel Ⅱ malocclusion were selected. Twin Block appliance combined with straight wire appliance was used for correction without tooth extraction. The lateral films of head were shot before and after treatment in order to conduct X-ray cephalometric analysis. Results All patients com-pleted active corrective treatment within (18±2.0) months. After treatment, the lower jaw moved forward and the classⅠ molar-canine relationship was established. Normal overbite and cover was obtained. The patients with lower mandible retrusion achieved obvious corrective effects and their appearance improved. After treatment, X-ray cephalo-metric analysis showed that SNB increased by 3.25° on average, SNA remained the same, ANB reduced by 6.50° on av-erage, IMPA reduced by 6.95° on average, FMIA increased by 3.61° on average, FMA increased by 2.53° on average, Po-Co increased by 5.12 mm on average, and Vits reduced by 1.29 mm on average(P<0.05). Conclusion In the correc-tion of early Angle Ⅱ malocclusion, Twin Block functional appliance combined with straight wire appliance shows evi-dent effects and patient satisfaction, thereby worthy of clinical promotion.
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