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目的:探讨安氏Ⅱ类错非拔牙矫治中GMD矫治器的疗效和适应症。方法:选择36例恒牙早期安氏Ⅱ类病例,主要表现为以乳磨牙早失形成的磨牙近移或上牙列轻中度拥挤的的非拔牙患者为研究对象,通过运用GMD推磨牙装置远移磨牙开辟后牙间隙。结果:36例患者中除1例因上切牙唇倾致患者对面形不满意而改行拔牙矫治外其余患者均取得了较好的疗效。第一磨牙平均远移5.6mm,远移到位平均4-5个月。磨牙建立中性关系。结论:GMD装置是一种快速有效的推磨牙向后的矫治器,但要掌握好适应症才能取得成功。
Objective: To investigate the efficacy and indications of GMD appliance in Class Ⅱ malocclusion without extraction. Methods: Thirty-six cases of early Grade II malocclusion were selected as the study object. The main findings were non-extraction patients with proximal molars or moderately crowded dentition formed by premature loss of primary molars. By using the GMD molars device Far away from molars to open the gap between the teeth. Results: In 36 patients, except for one patient who was not satisfied with the shape of the upper lip caused by the upper lip incision, the other patients except the tooth extraction treatment had achieved better curative effect. On average, the first molars moved 5.6mm away from the average place for 4-5 months. Molar to establish a neutral relationship. Conclusion: The GMD device is a quick and effective orthodontic device for molars. However, it is important to have indications for success.