河北医科大学学报 ›› 2021, Vol. 42 ›› Issue (1): 60-65.doi: 10.3969/j.issn.1007-3205.2021.01.013

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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

YU Jing1, LIU Ya-fei2*, ZUO Yan-ping2, LIU Xin3, ZHAO Li-xia2, WEI Jing2   

  1. 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
  • 出版日期:2021-01-25 发布日期:2021-02-05
  • 作者简介:于静(1974-)，女，河北沧州人，河北省石家庄市第二医院主任医师，医学硕士，从事儿童口腔科疾病诊治研究。
  • 基金资助:
    河北省医学科学研究重点课题计划(20100050)

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

  1. 1.Department of Stomatology, Shijiazhuang Second Hospital, Hebei Province, Shijiazhuang 050051, 
    China; 2.Department of Orthodontics, the First Hospital of Hebei Medical University, Shijiazhuang 
    050031, China; 3.Department of Stomatology, the Fourth Hospital of 
    Hebei Medical University, Shijiazhuang 050011, China
  • Online:2021-01-25 Published:2021-02-05

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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。


关键词: 正畸学, 矫正；牙胚；牙, 乳；正畸矫正器；错牙合, Ⅲ类

Abstract: 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.

Key words: orthodontics, correction； tooth germ； tooth, deciduous, orthodontic appliances, malocclusion, angle class 

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