上下颌联合快速扩弓结合固定矫治器矫治前后牙弓形态变化的研究

摘要

目的：研究分析上下颌联合快速扩弓结合 MBT 直丝弓矫治器矫治错(牙合)畸形患者的临床疗效。方法：选择36例进行上下颌联合快速扩弓结合直丝弓矫治器治疗结束的患者，治疗前后分别对每位患者进行模型测量和头影测量分析。结果：矫治后上下颌牙弓宽度和牙弓周长均增加，牙弓宽度增加主要在前磨牙区，牙弓前段深度减小（P ＜0．05）。联合扩弓在骨性垂直方向上的变化无差异（P ＞0．05），U1-SN、U1-NA 减小，L1-MP、L1-NB 增大（P ＜0．05）。结论：上下颌联合扩弓结合直丝弓矫治技术可以有效地解除拥挤并保持良好的咬合状态，颌骨在垂直方向上没有产生不利影响。%Objective:To study the dental and skeletal changes after orthodontic treatment for malocclusion patients with rapid maxil-lary and mandibular expansion companied with fixed appliance.Methods:36 patients underwent the treatment with rapid maxillary and mandibular expansion companied with straight wire appliance.Pre-and post-treatment dental casts and lateral cephalometric radiographs were measured and compared.Results:After treatment,the maxillary and mandibular arch width perimeters increased(P <0.05).The anterior arch depths decreased(P <0.05).No significant differences were found in vertical skeletal variables(P >0.05).U1-SN and U1-NA decreased,L1-MP and L1-NB increased(P <0.05).Conclusion:Dental crowding can be solved effectively and occlusion re-lationship can be kept well with rapid maxillary and mandibular expansion companied with straight wire appliance without influence on the vertical skeletal relationship.