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目的:观察应用Twin-Block功能矫治器联合MBT直丝弓矫治技术双期矫治快速生长期下颌后缩性安氏Ⅱ1错的临床疗效。方法:选择以下颌后缩为主要临床表现的生长期安氏Ⅱ1错患者16例,采用双期矫治I,期应用Twin-Block功能矫治器,Ⅱ1期应用MBT直丝弓矫治技术,应用X线头影测量分析,对患者治疗前后的硬组织变化进行分析,并对测量结果进行t检验。结果:治疗前后患者外形侧貌及覆盖改善明显。X线测量结果ANB,SNA,Go-Gn,L1-MP,ANS-Me变化有统计学意义。结论:对于快速生长期的下颌后缩性安氏Ⅱ1错采用双期矫治有明显疗效,可以有效改变前牙的覆盖和磨牙关系,这种改善包括骨骼效应和牙效应。
OBJECTIVE: To observe the clinical effect of Twin-Block functional appliance combined with MBT straight wire appliance in the treatment of rapid mandibular Angle Ⅱ1 malocclusion with rapid growth. Methods: Sixteen patients with Angle Ⅱ 1 malocclusion in the growing stage were selected as mandibular retrusion. The patients were treated with double-stage I and stage II Twin-Block appliance and stage II with MBT straight-line appliance. X Linear cephalometric analysis of patients before and after treatment of hard tissue changes were analyzed, and the results of t test. Results: Appearance and coverage of patients before and after treatment improved significantly. X-ray measurements ANB, SNA, Go-Gn, L1-MP, ANS-Me changes were statistically significant. CONCLUSIONS: For the fast-growing mandibular retrusion AngleⅡ1 malocclusion with double-phase correction has a significant effect, which can effectively change the anterior tooth coverage and molar relationship, this improvement includes the bone effect and tooth effect.