最大支抗拔牙病例上切牙和上唇矢状向变化的研究

doi:10.3969/j.issn.1673-5749.2010.05.007

摘要/Abstract

摘要：

目的研究使用最大支抗的青少年和成人拔牙矫治前后侧貌软硬组织矢状向变化及其相关情况。方法对采用最大支抗的13 例青少年和14 例成人拔牙矫治病例前后9 项软硬组织指标进行对比，通过配对t 检验评价软硬组织的变化情况，并对其中部分指标进行相关性分析和直线回归。结果1）青少年组的9项测量指标中， U1-SN、U1-PM 和牙弓拥挤度的改变差异均有统计学意义。其中，上切牙内收量和上唇内收量均与治疗前的牙弓拥挤度呈负相关，与治疗前上唇至E 线距离呈正相关。回归方程为：上唇内收量=-2.900+0.926×上切牙内收量。2）成人组的9 项指标中，除SNA 和Ls-PM 外，其余指标改变差异均有统计学意义。其中，上切牙内收量与治疗前上切牙唇倾度呈正相关，与治疗前牙弓拥挤度呈负相关；上唇内收量仅与治疗前上切牙的唇倾度呈正相关。回归方程为：上唇内收量=-1.027+0.706×上切牙内收量。结论使用最大支抗的拔牙矫治对于成人解除拥挤、内收上切牙和上唇有很好的效果；青少年矫治后也能明显地解除拥挤、内收上前牙，但由于生长发育的关系，其上唇内收并不明显。

关键词: 拔牙, 正畸治疗, 最大支抗, 侧貌分析, 上切牙, 上唇

Abstract:

Objective The study was designed to evaluate the comparison and correlation of soft and hard tissue profile changes in the extraction treatment using maximum anchorage in adolescent and adult cases. Methods Comparing 9 indicators about soft and hard tissues of those 13 adolescent and 14 adult cases between pre- and post- treatment with t-test respectively. After that, select some indicators and study the correlation of them. At last, a regression was deployed in this research. Results This study showed that: 1）In the adolescent group, U1- SN, U1-PM, the degree of crowding were changed significantly after the treatment. The decrease of the upper incisors and upper lip protrusion negatively correlated with the degree of crowding before the treatment, and positively correlated with the distance between the upper lip to E-line before the treatment. The linear regression equation between upper incisors and lip was y=-2.900+0.926x（y, changes of upper lip; x, changes of upper incisors）. 2）In the adult group, all of those indicators were significantly changed except SNA and Ls -PM. The decrease of the upper incisors positively correlated with the degree of incisor inclination on the lip before the treatment, and negatively correlated with the degree of crowding before the treatment. However, the decrease of the upper lip protrusion positively correlated with the degree of incisor inclination on the lip before the treatment. The linear regression equation was y =-1.027 +0.706x（y, changes of upper lip; x, changes of upper incisors）. Conclusion Extraction treatment with maximum anchorage has a good effect on correcting crowding and drawing back the position of upper incisors as well as upper lip. The decrease of upper incisors and lip protrusion is mainly influenced by the quantity of upper incisors′ protrusion and crowding in adults. But for adolescents, it will be complex, maybe growth is one of the important causes.

Key words: extraction, orthodontic treatment, maximum anchorage, profile, upper incisors, upper lip

何育薇，赖文莉，李璐，叶年嵩，陈静，黄玉辉. 最大支抗拔牙病例上切牙和上唇矢状向变化的研究[J]. 国际口腔医学杂志, 2010, 37(5): 519-522.

HE Yu-wei, LAI Wen-li, LI Lu, YE Nian-song, CHEN Jing, HUANG Yu-hui.. A comparison and correlation study about upper incisors and upper lip sagittal changes in the extraction cases with maximum anchorage[J]. Inter J Stomatol, 2010, 37(5): 519-522.

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