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目的:双垫矫治器(Twin block矫治器)及直丝弓固定正畸联合矫治安氏Ⅱ类1分类错畸形的效果。方法:选择11例(男5例,女6例)10～13岁以下颌后缩为主的安氏Ⅱ类错畸形患者应用Twinblock及直丝弓固定正畸联合矫治。每位患者治疗前拍摄头颅侧位片、曲面断层X线片。对Twin block及直丝弓固定正畸联合矫治前后头颅侧位X线片进行测量。结果:SNA、ANB、OJ、UISN减小,SNB、LIMP、Sn-A’-UL、LL-B’-Pos增大,下颌升支、下颌体长及下颌综合长度均有增长,差异均有显著性。结论:Twinblock矫治器治疗恒牙早期安氏Ⅱ类1分类错畸形,能明显减小前牙覆、覆盖,增加上颌弓宽度,促进下颌生长,有效改善患者下颌后缩的面型。联合固定正畸可达到良好的治疗效果。
OBJECTIVE: To evaluate the effect of Twin block appliance and Straight wire arch orthodontic appliance in the treatment of Class Ⅱ division 1 malocclusion. Methods: Eleven patients (5 males and 6 females) were enrolled in this study. Patients with Class Ⅱ malocclusion mandibular rupture under 10-13 years old were treated with Twinblock and orthodontic appliance. Each patient was photographed before treatment of cephalometric slices, curved tomographic X-ray films. Twin block and straight wire arch orthodontic treatment before and after correction of cephalometric X-ray films were measured. Results: SNA, ANB, OJ, UI SN decreased, SNB, LI MP, Sn-A’-UL, LL-B’-Pos increased, mandibular ascending branch, mandibular body length and mandibular combined length There is growth, the differences are significant. Conclusion: The Twinblock appliance for the treatment of Angle Class Ⅱ Division 1 malocclusion in the early stage of permanent dentition can significantly reduce the thickness and coverage of the anterior teeth, increase the width of the maxillary arch, promote the growth of the mandible, and effectively improve the mandibular retrusion shape. Joint fixed orthodontic can achieve good therapeutic effect.