拔牙与非拔牙矫治前后牙弓宽度的变化  

Changes in arch width after extraction and nonextraction treatment

作　　者：董作英[1] 刘东旭[1] 王铁军 刘莉[1] 

机构地区：[1]山东大学口腔医学院口腔正畸科,山东济南250012 [2]烟台市口腔医院口腔正畸科,山东烟台264001

出　　处：《上海口腔医学》2007年第4期355-357,共3页Shanghai Journal of Stomatology

摘　　要：目的:比较拔牙与非拔牙矫治前、后牙弓前后部宽度的变化。方法:选择50例患者的矫治前后模型作为研究对象,其中25例采取拔除4个第一前磨牙的矫治方法,为拔牙组;25例采取非拔牙矫治,为非拔牙组。观察2组矫治前、后牙弓前后部宽度的变化,采用SPSS11.0软件包进行配对t检验和χ2检验。结果:2组上颌尖牙间宽度均增大,但组间无统计学差异(P>0.05);2组下颌尖牙间宽度均增大,且组间有显著统计学差异(P<0.01);2组第二磨牙间宽度均无变化。结论:与非拔牙矫治相比,拔牙矫治并不会引起牙弓的缩窄。PURPOSE： To compare the changes of arch width in anterior and posterior arch after extraction and nonextraction treatment. METHODS： The pre- and post-treatment study model of 50 patients were randomly selected and measured,of which 25 patients with 4 pre-molar extraction was in the extraction group, while 25 patient with nonextraction treatment was in the nonextraction group. SPSS 11.0 software package was used for Chi-square and pared t test. RESULTS：The maxillary intercanine mean width was increased in both groups , but changes between the two groups were not statistically significant. The mandibular intercanine width of the extraction group was increased greater than the nonextraction group （P〈0.01）.In both groups ,changes of inter second-molar width were not statistically significant. CONCLUSION： Extraction treatment does not result in narrower dental arches than nonextraction treatment.

关 键 词：拔牙矫治 非拔牙矫治 牙弓宽度 

分 类 号：R783.5[医药卫生—口腔医学]