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治疗伴有深覆(牙合)的安氏Ⅱ类一分类的错(牙合)畸形主要是通过减小覆(牙合)的机制来减小覆盖。如何达到矫正深覆(牙合)的目的,有着不同的观点,本文研究的目的在于比较Andresen、Harvold,Begg矫治器对覆(牙合)和磨牙萌出的影响。本研究选择了安氏Ⅱ类一分类患者,分为三组。第一组:30例用Andresen矫治器;第二组:30例用Begg矫正技术并拔除了4个第一双尖牙;第三组:19例用Harvold矫治器;对照组24例是未治疗的轻度安氏Ⅱ类一分类病例。对每位患者拍照3张X线头颅侧位片,第一张在治疗前6个月内,年龄尽量接近12岁;第二张是去
Treatment of Class II malocclusion associated with deep overbite reduces coverage primarily by reducing the occlusion mechanism. The purpose of this study is to compare the effects of Andresen, Harvold and Begg appliances on the occlusion and molar eruption. This study chose the Class Ⅱ division of patients, divided into three groups. The first group: 30 cases with Andresen appliance; the second group: 30 cases with Begg orthodontic technique and removal of the first four canines; the third group: 19 cases with Harvold appliance; the control group, 24 cases were untreated Mild Class Ⅱ division of a case of Angle. For each patient take pictures of 3 X-ray cephalograms, the first one within 6 months before treatment, the age as close as possible to 12 years old; the second is to go