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| 影响口腔正畸治疗患者下颌第三磨牙状态改变的因素分析 | |
| 引用本文： | 李小彤,张东姝,杨雁琪. 影响口腔正畸治疗患者下颌第三磨牙状态改变的因素分析[J]. 北京大学学报(医学版), 2011, 43(2): 267-271 |
| 作者姓名： | 李小彤 张东姝 杨雁琪 |
| 作者单位： | 北京大学口腔医学院·口腔医院正畸科,北京,100081;河北省保定市第一中心医院,保定,071051;香港大学牙科学院正畸科,中国香港特别行政区,999077 |
| 摘 要： | 目的:研究影响口腔正畸患者治疗前、后下颌第三磨牙状态改变的因素。方法:利用正畸治疗前、后的全口曲面断层片,测量120例正畸患者的120颗下颌第三磨牙[男37例,女83例,年龄在10~24岁,平均(14.1±3.3)岁]前倾角度和间隙/宽度比值的改变,统计分析影响正畸治疗前、后改变的因素。结果:(1)正畸治疗前、后下颌第三磨牙前倾角度和间隙/宽度比值的改变个体差别较大;(2)影响正畸治疗前、后下颌第三磨牙前倾角度和间隙/宽度比值改变的因素主要有拔牙、下颌平面角、治疗前的前倾角度和间隙/宽度比值(P<0.05),而骨龄和牙龄等因素对下颌第三磨牙状态的影响差异无统计学意义;(3)Logistic回归分析,进入治疗后下颌第三磨牙前倾角度是否<30°判别方程的因素有拔牙、下颌平面角和治疗前的前倾角度,其中拔牙状况影响程度较大,拔牙使得治疗后的前倾角度<30°(直立倾向)的可能性更大,是不拔牙的4.210倍。结论:正畸拔牙治疗有助于下颌第三磨牙的直立,并使其萌出间隙增大;第三磨牙治疗前的状况(前倾角度和间隙/宽度比值)也是影响治疗后改变的重要因素;下颌平面角度小的患者预后下颌第三磨牙直立的可能性增加。 |
| 关 键 词： | 正畸学 磨牙 第三 拔牙 放射摄影术 全景 |
Factors influencing the changes of lower third molars' angulation and space/crown width ratio by orthodontic treatment |
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| LI Xiao-tong,ZHANG Dong-mei,YANG Yan-qi. Factors influencing the changes of lower third molars' angulation and space/crown width ratio by orthodontic treatment[J]. Journal of Peking University. Health sciences, 2011, 43(2): 267-271 | |
| Authors: | LI Xiao-tong ZHANG Dong-mei YANG Yan-qi |
| Affiliation: | LI Xiao-tong1,ZHANG Dong-mei2,YANG Yan-qi3(1.Department of Orthodontics,Peking University School and Hospital of Stomatology,Beijing 100081,China,2.First Central Hospital of Baoding,Baoding 071051,3.Department of Orthodontics,Faculty of Dentistry,The University of Hong Kong,Hong Kong 999077,China) |
| Abstract: | Objective: To investigate the factors which influence the changes of lower third molars' angulation and space/crown width ratio by orthodontic treatment.Methods: Pretreatment and posttreatment panoramic radiographs of 120 orthodontically treated cases were taken.The lower third molars' angulation and space/crown width ratio were examined and the relative factors on changes were analyzed.Results:(1)The changes of the lower third molars' angulation and space/crown width ratio after orthodontic treatment were ... |
| Keywords: | Orthodontics Molar third Tooth extraction Radiography panoramic |
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