安氏Ⅱ类错4种治疗方法比较

Compare of four methods in treatment about Angle ⅡMalocclusion

目的:通过对安氏Ⅱ类错4种治疗方法的临床分布情况的统计,了解其使用比例及随时间的变化。方法:对2007～2011年的9759例完成病例进行调查,筛选出矫治前磨牙关系为安氏Ⅱ类关系的2864例患者,并统计使用分别以推磨牙向远中、导下颌向前、拔除4颗前磨牙、拔除2颗上颌牙齿为矫治方法治疗安氏Ⅱ类错患者的人数和比例。结果:4种方法中,使用导下颌向前治疗为32%,所占比例最大。5年来,使用非拔牙矫治安氏Ⅱ类错牙合患者在逐渐减少,而使用其他矫治技术治疗安氏Ⅱ类错患者在逐渐增加。结论:安氏Ⅱ类错矫治中,导下颌向前是使用最多的方法,采取非拔牙矫治在逐年减少,使用成人"MTM"治疗和手术治疗的患者逐年增多。

Objective To understand the use ratio and change with time by the statistics of four method in treatment about Angle ⅡMalocclusion.Methods The first,9759 completed cases were investiged between 2007 and 2011,and 2864 cases were creened before treatment for class II molar relationship.Then,the number and percentage of class II malocclusion patients were counted,and the patients were treated severally by distalization of upper molar、mandibular advancement、extracting four premolars and extracting two maxillary teeth.Results The mandibular advancement is The largest proportion,and is 32%.During 5 years,the patients were In decline by Non extraction orthodontic treatment,and the patients inceased by the orther methods of orthodontic treatment.Conclusion The mandibular advancement is the most frequently used method between treatment about Angle ⅡMalocclusion.the patients were In decline by Non extraction orthodontic treatment,and the patients inceased by adult＂MTM＂ treatment and operation treatment.