PAR指数及头影测量评价拔除下颌第一磨牙的矫治效果

目的分析下颌第一磨牙因病变拔除的错畸形患者的正畸治疗效果。方法收集下颌第一磨牙因龋病或者根尖周病变而被拔除的病例19例作为试验组,男3例,女16例,（21.37±5.07）岁。19例拔除4颗第一前磨牙病例作为对照组,男7例,女12例,（20.42±4.23）岁。所有病例均采用MBT直丝弓矫治器矫治,滑动法关闭间隙并配合颌间牵引完成矫治,对比正畸前后的PAR指数和头影测量值。结果试验组与对照组治疗前后PAR加权总分及各项PAR分值差异有统计学意义（P〈0.01）,试验组与对照组治疗后PAR指数差异无统计学意义;试验组治疗前后U1-SN（°）、U1-NA（mm）、U1-NA（°）减少值差异有统计学...

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Published in口腔疾病防治 Vol. 25; no. 12; pp. 788 - 793
Main Author 王庆琳;周少云;何永坚;马明玉;李荣霞
Format Journal Article
LanguageChinese
Published 2017
Subjects
PAR指数
下颌第一磨牙
头影测量
拔除
正畸治疗
疗效评价
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Summary:目的分析下颌第一磨牙因病变拔除的错畸形患者的正畸治疗效果。方法收集下颌第一磨牙因龋病或者根尖周病变而被拔除的病例19例作为试验组,男3例,女16例,（21.37±5.07）岁。19例拔除4颗第一前磨牙病例作为对照组,男7例,女12例,（20.42±4.23）岁。所有病例均采用MBT直丝弓矫治器矫治,滑动法关闭间隙并配合颌间牵引完成矫治,对比正畸前后的PAR指数和头影测量值。结果试验组与对照组治疗前后PAR加权总分及各项PAR分值差异有统计学意义（P〈0.01）,试验组与对照组治疗后PAR指数差异无统计学意义;试验组治疗前后U1-SN（°）、U1-NA（mm）、U1-NA（°）减少值差异有统计学意义（P〈0.01）,其余值差异无统计学意义,对照组治疗前后U1-SN（°）、U1-NA（mm）、U1-NA（°）、L1-NB（°）、L1-NB（mm）减少值差异有统计学意义（P〈0.01）,试验组与对照组之间L1-NB（°）、L1-NB（mm）减少值差异有统计学意义（P〈0.01）,其余值差异无统计学意义。结论对于下颌第一恒磨牙存在严重龋坏或根尖周病变的患者,拔除下颌第一磨牙,利用下颌第三磨牙正畸前移和（或）健康的前磨牙进行矫正,可以避免口腔内义齿修复治疗,使患者获得满意的面型以及良好的治疗效果。
Bibliography:44-1724/R
Objective To access the clinical effect of orthodontic treatment in patients with extraction of mandiblefirst molar. Methods Nineteen patients（three male and sixteen female） with extraction of mandible first molar be-cause of caries, periapical disease were collected as experimental group. The age was 21.37 ± 5.07. Nineteen patients（seven male and twelve female） with extraction of four premolar as control group, The age was 20.42 ± 4.23. All the pa-tients were treated with orthodontic space closure using MBT preadjusted appliance and sliding mechanics PAR indexand cephalomertics that were compared before and after orthodontic treatment. Results The two groups reduction inweighted PAR score and each of the PAR score differences were statistically significant（P〈0.01）. There was no signifi-cant difference between the two groups after treatment in PAR. There were significant changes in U1-NA（°）、U1-NA（mm）、U1-SN（°）, but not in the rest of the value in experimental group（P〈0.01）. The L1-NB（°）、L1-NB（mm） was
ISSN:2096-1456
2097-0234