改良肌激动器矫治生长发育期安氏Ⅱ类1分类错[牙合]畸形21例临床分析

Clinical analysis of the treatment of 21 cases with developmental malocclusion of class Ⅱ division1 with the modified activator

目的:观察改良肌激动器矫治生长发育期安氏Ⅱ类1分类错[牙合]畸形临床疗效。方法:收集2012-2019年我院收治的生长发育期安氏Ⅱ类1分类错[牙合]畸形病例42例,随机分为实验组与对照组,每组21例。实验组采用改良肌激动器治疗,对照组采用传统肌激动器治疗,疗程均为6个月。治疗前、治疗3个月、治疗6个月分别拍摄头颅侧位片并进行头影测量分析。结果:治疗3个月后,实验组治疗前、后的下齿槽座角(SNB)、上下齿槽座角(ANB)、Y轴角(Y-axis)、前上面高比(N-ANS/N-Me(%))、前下面高比(ANS-Me/N-Me(%))、下颌升支高度(Ar-Go/mm)、下颌体长度(Go-Me/mm)、下颌平面角(MP-SN)、前牙覆盖(OJ/mm),差异均有统计学意义(均P<0.05),而对照组差异无统计学意义(P>0.05);治疗6个月后,实验组和对照组的以上指标差异均有统计学意义(均P<0.05)。两组其余头影测量指标治疗前、后差异无统计学意义(P>0.05)。结论:改良肌激动器矫治生长发育期安氏Ⅱ类1分类错[牙合]畸形效果良好,是一种简单而又行之有效的方法。

Objective:To observe the clinical effect of modified activator in the treatment of developmentalclassⅡdivision 1malocclusion.Methods:In the case of ClassⅡdivision 1 juvenile,a modified activator was used to stimulate mandibular growth forward and inhibit maxillary growth,so as to achieve normal sagittal development of maxilla and mandible.Forty-two cases of developmental class II division 1malocclusion admitted to our hospital from 2012 to 2019 were randomly divided into an experimental group and a control group,with21 cases in each group.The patients in the experimental group were treated with modified muscle agonist,while those in thecontrol group were treated with traditional muscle agonist.The course of treatment was 6 months.Before treatment and after 3 and 6 months of treatment,lateral cephalographs were taken and cephalometric analysis was performed.Results:SNB angle,ANB angle,Y axis angle,N-ANS/N-Me,ANS-Me/N-Me,Ar-Go,Go-Me,MP-SN and OJ were significantly different before and after treatment in the experimental group(P<0.05).There was no significant difference in the control group before and after treatment(P>0.05).After 6 months of treatment,the abovein dicators were evidently different between the two groups(P<0.05).There were no significant differences in other cephalometric indexes between the two groups before and after treatment(P>0.05).Conclusion:Modified activator is a simple and effective method for the treatment of classⅡdivision 1 juvenile malocclusion.