弓丝刚柔组合强化正畸支抗的临床效果评价

A Clinical Study of Twin-Wires on Anchorage Reinforcement

目的评价刚性与柔性弓丝组合在强化正畸支抗中的临床应用。方法选择严重前牙拥挤病例10例,同时应用0.018不锈钢丝及0.014NiTi丝,在刚性弓丝支持下远移尖牙并利用NiTi丝弹性位移侧切牙。测量治疗前后前牙、后牙支抗稳定性及牙弓形态稳定性指标。结果矫治前后支抗前牙与后牙位置无显著变异,牙弓基态保持稳定。结论弓丝刚柔组合在高效移动正畸牙的同时,能最大限度地稳定非移动支抗牙。

Objective This clinical trial was designed to impose a simultaneous placement of large-size stainless steel round wire and small-size NiTi, and to assess its effect on anchorage reinforcement. Methods Twin-arch wires were in place for relief of severe crowding. Distalization of canines were well conducted with support of rigid wire, together with a simultaneous repositioning of upper lateral incisors facilitated by resilient wire. The linear distance between APo and the first molar, together with other parameters, was measured for the evaluation of anchorage consolidation. Results Anchorage molars and anteriors, as well as the integrity of dental arches remained unchanged upon fulfillment of crowding relief, which was justified by statistical analysis. Conclusion Application of Twin-wires leads to a concurrence of efficient crowding relief and sufficient anchorage consolidation.