GMD矫治器与钟摆矫治器远移上颌磨牙效果对比研究

A comparative study of distalizing upper molar by greenfield molar distalization and pendulum appliance

目的:通过对GMD矫治器与钟摆矫治器的对比研究探讨该矫治器应用的可行性、优越性及其适应症。方法:对58例因上颌磨牙前移所导致的安氏II类错患者,分别使用GMD矫治器与钟摆矫治器进行推上颌磨牙向远中移动的非拔牙矫治,通过矫治前及磨牙远移到位后的X线头影测量及模型测量分析进行对比研究。结果:两种方法最终都实现了推磨牙远移的目的,但是GMD矫治器的磨牙移动更接近于整体移动,支抗控制也强于钟摆矫治器。结论:GMD矫治器能够有效、快速地远移磨牙,是一种新的有效远移磨牙的矫治器。

Objective： The purpose of this study was to compare the clinical effect of GMD appliance and Pendulum appliance.Method： 58 patients with Class Ⅱ malocclusion were treated with GMD appliance and Pendulum appliance by maxillary molars distalization without extraction. The effects were evaluated through pre- and post-distalization cephalometric radiographs and the dental models analysis.Result： GMD appliance and Pendulum appliance both can move the maxillary molar successfully. The moving mode of the maxillary molar distalization by GMD appliance was nearly translation.Conclusion：The GMD appliance was an effectine intraoral patient-independence appliance for the maxillary molar distalization.