改良前方牵引矫治器治疗骨性Ⅲ类错伴拥挤的疗效评价
Evaluation of a modified maxillary protraction appliance for the treatment of patients with skeletal Class Ⅲ mal-occlusion associated with crowding
刘晔 1葛晓磊 1张士珑 1覃缘 2侯彦 1卢海燕 1马文盛1
作者信息
- 1. 河北医科大学口腔医学院·口腔医院 正畸科,河北省口腔医学重点实验室,河北省口腔疾病临床医学研究中心,河北 石家庄 050017
- 2. 遂宁市中心医院 口腔医学中心,四川 遂宁 629000
- 折叠
摘要
目的:评价改良前方牵引矫治器治疗骨性Ⅲ类错伴拥挤的疗效.方法:将40例骨性Ⅲ类错患者,按磨牙关系分为2组,每组20例,试验组磨牙中性或远中关系,应用改良前方牵引矫治器;对照组磨牙近中关系,应用传统前方牵引矫治器.2组患者治疗前后分别拍摄头颅侧位片进行比较,采用SPSS 22.0软件包对数据进行统计学分析.结果:2组患者治疗前后角度测量中,SNA、ANB、SN-MP、U4-SN显著增加(P＜0.01),SNB显著减小(P＜0.01);SN-OL在试验组治疗前后变化有显著差异(P＜0.05).2组患者治疗前后矢状向测量指标中,除对照组上颌牙弓长度外,其余指标均有显著改变(P＜0.05);垂直向测量指标中,U1-PP、L1-MP、U4-SN、U6-SN、ANS-Me显著增加(P＜0.05);U4-PP、U6-PP在对照组治疗前后的变化有显著差异(P＜0.05).2组患者治疗前后头影测量值变化量与对照组相比,试验组治疗后上颌牙弓长度显著增加,U6位置更偏远中,磨牙关系变化更小(P＜0.01).结论:改良前方牵引矫治器对磨牙中性或远中关系的骨性Ⅲ类错伴拥挤患者具有良好的前方牵引和推磨牙向远中的效果.
Abstract
PURPOSE:To investigate the efficacy of a modified maxillary protraction appliance in patients of skeletal Class Ⅲ with crowding.METHODS:Forty patients with skeletal Class Ⅲ malocclusion were divided into two groups,with 20 patients in each group.The experimental group had molar in a neutral or distal relationship and applied a modi-fied maxillary protraction appliance,while the control group had molar mesial relationship and applied a conventional maxillary protraction appliance.Lateral cephalometric radiographs were taken before and after treatment in both groups for comparison.SPSS 22.0 software package was used for data analysis.RESULTS:The angle measurements taken before and after treatment showed a significant increase in SNA,ANB,SN-MP and U4-SN(P＜0.01),while SNB decreased(P＜0.01)in both groups.SN-OL changes were statistically different before and after treatment in the experimental group(P＜0.05).The sagittal measurements before and after treatment in both groups showed significant alterations in all(P＜0.05)but the length of the maxillary arch in both groups.For vertical measurements,Ul-PP,L1-MP,U4-SN,U6-SN,and ANS-ME all increased(P＜0.05),while the changes of U4-PP and U6-PP in the two groups before and after treatment were sta-tistically different(P＜0.05).Compared with the control group,the experimental group had a significantly increased maxil-lary arch length,a more remote location at U6,and a less variable molar relationship after treatment(P＜0.01).The two groups showed a variable amount of cephalometric measurements before and after treatment:the experimental group had a significant increase in maxillary arch length,a more remote position at U6,and a smaller change in molar relationship compared to the control group(P＜0.01).CONCLUSIONS:The modified maxillary protraction appliance showed good re-sults for maxillary protraction and pushing the molar distally in patients with skeletal Class Ⅲ with crowding at neutral or distal molar relationship.
关键词
骨性Ⅲ类错/改良前方牵引/牙列拥挤/推磨牙向远中Key words
Skeletal Class Ⅲ malocclusion/Modified maxillary protraction/Crowding/Molar distalization引用本文复制引用
基金项目
河北省医学科学研究重点课题(20180609)
河北医科大学口腔医院自主培育计划(kq201934)
出版年
2024
NETL
NSTL
万方数据