A comparative study of distalizing upper molar by Greenfield Molar Distalization and traditional molar distalization appliance

Objective The purpose of this study was to compare the clinical effect of Greenfield Molar Distaliza tion(GMD) appliance and traditional molar distalization appliance. Methods 48 patients with Class II malocclusion were treated with GMD appliance, Pendulum appliance and extraoral arch by maxillary molars distalization without extraction. Then the effects were evaluated through pre- and post-distalization cephalometric radiographs and the dental models analysis. Results GMD appliance, Pendulum appliance and extraoral arch all can move the maxillary molar successfully. The moving mode of the maxillary molar distalization by GMD appliance is nearly translation. Conclusion the GMD appliance is an effected intraoral patient-independence appliance for the maxillary molar distalization.