Forsus矫治恒牙期安氏Ⅱ类错下颌后缩的肌电图研究  

The study of electromyography of Class Ⅱ malocclusion with mandibular retrusion treated by Forsus appliance

作　　者：李洪发[1] 王雨生[2] 王伟[1] 王悦[1] 杨亚囡[1] 

机构地区：[1]天津医科大学口腔医院正畸科,300070 [2]天津医科大学口腔医院口腔解剖生理教研室,300070

出　　处：《现代口腔医学杂志》2009年第1期35-38,共4页Journal of Modern Stomatology

摘　　要：目的Forsus应用于已过生长发育高峰期安氏Ⅱ类错下颌后缩恒牙期患者,观察比较治疗前后咬肌肌电图的变化规律,探讨肌功能平衡与骨组织改建的关系。方法临床选择19例(男9例,女10例)青少年晚期安氏Ⅱ类错下颌后缩患者,年龄在14～16.5岁,恒牙。治疗前后分别进行咬肌开颌反射、下颌姿势位咬肌肌电图、牙尖交错紧咬咬肌募集肌电图、咬肌咀嚼周期肌电图的检测。应用SPSS 12.0统计软件对治疗前后的测量结果进行配对t检验。结果肌电图测定:①开反射潜伏期无明显变化,静止期由原来延长趋于正常;②下颌姿势位图形稳定,无异常波形出现;③牙尖交错位紧咬由原来异常的混合相趋于正常的干扰相,图形密集,波幅增高,波形趋于一致;④咀嚼周期食物粉碎相异常停顿消失或减少,图形较一致,开口相、闭口相无异常收缩出现;⑤咀嚼周期总时程有缩短趋势。结论应用Forsus矫治器治疗已过生长发育高峰期安氏Ⅱ类错下颌后缩患者,引导下颌向前改变颌位后,影响咬肌功能发挥的周围条件发生改变,咬肌肌功能活动增强,肌电图规律趋于正常。Objective To compare the electromyography changes of masseter muscle before and after the treatment of skeletal Class Ⅱ mandibular retrusion of permanent dentition by using Forsus appliance.Methods The patient selection criteria was Class Ⅱ malocclusion caused by retrognathic mandible,normal or low-angle growth pattern,and in the postpeak growth period.The study samples were consisted of 19 subjects(age14～16.5),Electromyography of masseter muscle was obtained after the leveling phase and at the time of the ...

关 键 词：FORSUS 安氏Ⅱ类错 下颌后缩 恒牙期 肌电图 

分 类 号：R783.5[医药卫生—口腔医学]