上颌第二恒磨牙不同萌出状态的安氏Ⅱ~1类患者应用口外弓治疗前后的头影测量研究  

Cephalometric research of patients in different maxillary second molar eruption statuses using face bows

作　　者：郐滨[1] 朱静涛[1] 李志媛[1] 刘奕[1] 

机构地区：[1]中国医科大学附属口腔医院奉天门诊,沈阳110013

出　　处：《口腔医学》2013年第7期465-468,共4页Stomatology

基　　金：辽宁省科学技术计划项目(2011225017);沈阳市科技计划项目(F11-262-9-07)

摘　　要：目的评价应用口外弓非拔牙矫治上颌第二恒磨牙不同萌出状态的安氏Ⅱ1类错畸形的临床效果。方法选择恒牙期应用口外弓进行非拔牙矫治的安氏Ⅱ1类错畸形患者36例,年龄10～15岁,平均12.5岁。根据上颌第二恒磨牙萌出状态分为4组,测量所有患者治疗前、后头颅侧位片,采用方差分析方法比较治疗效果。结果矫治前后的显著性改变主要发生在上颌,上颌第二磨牙牙胚位于上颌第一磨牙颈部以下组有统计学意义的指标最多(SNA、ANB、Wits距、U6-Ptv、over-jet),且明显优于其他3组。结论口外弓颈牵引能有效改善恒牙期深覆盖,矫正磨牙关系,在上颌第二恒磨牙未萌,特别是其牙胚尚处于第一恒磨牙颈部以下时采用此方法效果最好。Objective To analyze clinical effect of extraoral appliance in non-extraction treatment of cases of Angle classⅡ1 malocclusion in different maxillary second molar eruption statuses.Methods 36 cases of Angle classⅡ1 malocclusion,who were treated with extraoral appliance in permanent dentition without extraction were chosen,aged 10-15 years old with an average age of 12.5 years old.They were divided into four groups according to different maxillary second molar eruption statuses.Pretreatment and posttreatment lateral cephalometrics were analyzed by ANOVA to compare treatment effects.Results Maxilla had a very significant change before and after treatment.The group in which maxillary second molar germs were below maxillary first molar necks had the most indexes which were statistically significant（SNA,ANB,Wits distance,U6-Ptv,overjet）,which were obviously better than those in the other three groups.Conclusions Traction with face bows can improve deep overjet in permanent dentition and correct molar relationship.It＇ s the best choice when the second permanent teeth haven＇t erupted,especially when tooth germ is below first molar neck.

关 键 词：口外弓 安氏Ⅱ1类错[牙合]畸形 非拔牙矫治 

分 类 号：R783.5[医药卫生—口腔医学]