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目的 寻求早期骨性Ⅱ类错牙合更有效的矫治方法。方法 对 1 6例替牙期Ⅱ1 患者将Clark的Twinblock矫治器改良 ,去除口外弓、头帽 ,将磁力引入口内矫治器中 ,即磁力双牙合垫矫治器 ,作治疗前后的X线头影测量对比分析 ,疗效与Twinblock组比较 ,并进行统计学分析。结果 与Twinblock有同样的功能矫治效果 ,统计结果显示 ,磁力矫治器组B -CFH ,| -NA角 ,|-SN角增大明显 ,有统计学意义。结论 磁力双牙合垫矫治器能取得确切的功能矫治效果 ,更适合低角及上切牙角度正常的AngleⅡ1 患者
Objective To seek a more effective correction method for early skeletal Class Ⅱ malocclusion. Methods Sixteen cases of periodontal disease Ⅱ1 patients were modified Clark's Twinblock appliance, remove the bow, head cap, the magnetic force introduced into the oral appliance, namely magnetic bicuspid appliance for preoperative and postoperative X-ray measurement Comparative analysis, efficacy and Twinblock group comparison, and statistical analysis. Results and Twinblock have the same functional correction effect, the statistical results show that the magnetic appliance group B -CFH, | -NA angle, | -SN angle increased significantly, statistically significant. Conclusion The magnetic bimacic appliance can achieve the exact effect of orthodontic treatment and is more suitable for AngleⅡ1 patients with normal angle and upper incisors