改良[牙合]垫矫治器治疗乳牙反[牙合]后恒切牙胚位置的相关性分析  

Correlation analysis of the position of permanent incisor germs after the modified block appliance correcting the deciduous anterior crossbite

作　　者：于静[1] 刘亚非[2] 左艳萍[2] 刘昕[3] 赵利霞[2] 尉静[2] YU Jing;LIU Ya-fei;ZUO Yan-ping;LIU Xin;ZHAO Li-xia;WEI Jing(Department of Stomatology, Shijiazhuang Second Hospital, Hebei Province, Shijiazhuang 050051, China;Department of Orthodontics, the First Hospital of Hebei Medical University, Shijiazhuang 050031, China;Department of Stomatology, the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China)

机构地区：[1]河北省石家庄市第二医院口腔科,河北石家庄050051 [2]河北医科大学第一医院口腔正崎科,河北石家庄050031 [3]河北医科大学第四医院口腔科,河北石家庄050011

出　　处：《河北医科大学学报》2021年第1期60-65,共6页Journal of Hebei Medical University

基　　金：河北省医学科学研究重点课题计划(20100050)。

摘　　要：目的研究改良[牙合]垫矫治器矫治乳牙反[牙合]后,[牙合]颌面的改变以及影响治疗后上颌恒切牙牙胚位置的相关因素。方法选取乳牙反[牙合]患者20例,使用改良[牙合]垫矫治器矫治乳牙反[牙合],采用对比分析治疗前后[牙合]颌面的改变,采用相关性分析矫治后上颌恒牙胚位置改变的影响因素。结果乳牙反[牙合]患者治疗前后相比,除SNA角(蝶鞍点-鼻根点-上齿槽座点)、SNB角(蝶鞍点-鼻根点-下齿槽座点)、NP-FH角(面角)、L1-NBmm距(下前牙切缘点-NB的距离)、MP-SN角(下颌平面与前颅底平面夹角)、FH-MP角(下颌平面角)、面轴角(蝶鞍点-颏顶点与眶耳平面夹角)、D1i-Y距(乳切牙切缘-Y轴的距离)、A-Y距(上齿槽座点-Y轴的距离)外,余下19项参数差异均有统计学意义(P<0.05);通过将患者治疗后的[牙合]颌面指标及其恒牙胚位置指标进行相关性分析,发现恒牙胚位置与上颌位置及乳牙位置存在正相关关系。结论改良[牙合]垫矫治器对于纠正乳牙反[牙合]疗效肯定,治疗后上颌骨向前生长和乳前牙突度增加均有利于上颌恒牙胚向前下方的位置改变,有利于替牙后正常覆[牙合]覆盖关系的建立。Objective To study the changes of maxillofacial bone and related factors affecting the position of maxillary permanent incisor germs after treatment with modified block appliance.Methods A total of 20 patients with deciduous anterior crossbite were selected and the modified block appliance was used to correct deciduous anterior crossbite.The maxillofacial changes before and after treatment were compared,and the influencing factors of changes in permanent incisor germs position after correction were analyzed by correlation analysis.Results Before and after treatment,there were significant differences in 19 parameters of patients with deciduous anterior crossbite except SNA,SNB,NP-FH,L1-NBMM,MP-SN,FH-MP,facial axis angle,D1i-Y and A-Y(P<0.05).After treatment,the correlation analysis of occlusal maxillofacial index and permanent tooth germ position index showed that there was a positive correlation between permanent tooth germ position and maxillary position and deciduous tooth position.Conclusion The modified block appliance is effective in correcting deciduous anterior crossbite.After treatment,the maxillary growth forward and the increase of anterior teeth protrusion are conductive to the change of the position of permanent incisor germs forward and downward,as well as to the establishment of normal overbite relationship in mixed dentition period.

关 键 词：正畸学 矫正 牙胚 牙 乳 正畸矫正器 错[牙合] Ⅲ类 

分 类 号：R783.5[医药卫生—口腔医学]