摘要
目的:了解Bolton指数在各类骨性错畸形的分布特点、性别差异及上、下颌牙量关系在各类骨性错畸形中可能所起的作用。方法:选择符合标准的180副模型,每种骨性错各60副(男、女各30副),分别测量12颗恒牙(左右第一恒磨牙之间)的近远中宽度,计算各组前牙比和全牙比,采用SPSS15.0软件包对测量数据分别进行t检验、方差分析和χ2检验。结果:各组错男女的前牙比和全牙比无显著差异,骨性Ⅲ类错的前牙比和全牙比与I类和Ⅱ类错有显著差异,骨性Ⅰ类和Ⅱ类错的前牙比和全牙比无显著差异,骨性Ⅲ类错的前牙比和全牙比人数分布与Ⅱ类具有显著性差异。结论:骨性Ⅲ类错的前牙比和全牙比较骨性Ⅰ类、骨性Ⅱ类大,且其前牙Bolton不调的人数比例较大。
PURPOSE： To evaluate the differences in tooth size ratios and distributions of Bohon anterior and overall ratios among different skeletal maloeclusions. METHODS： 180 subjects were involved in this study, each malocclusion group consisted of 60 subjects （30 males and 30 females）. The mesio-distal width from left first molar to right first molar was measured, Bohon anterior and overall ratios were calculated. Student＇s t test, ANOVA, LSD and X^2 test were performed for statistical analysis with SPSS15.0 software package. RESULTS： No statistically significant sex difference was found in anterior or overall ratio in any malocclusion. Significant difference was found for all ratios between skeletal Class Ⅲ and skeletal Class Ⅰ , so with skeletal Class Ⅱ. No significant differences in all ratios between skeletal Class Ⅰ and Class Ⅱ were noted. Significant difference was found in the distribution of subjects with anterior and overall ratio discrepancies between skeletal Class Ⅲ and skeletal Class Ⅱ. CONCLUSIONS： The mean anterior and overall ratios for skeletal Class Ⅲ maloeclusions are significantly greater than those for skeletal Class Ⅰ and Class Ⅱ. The number of subjects with anterior ratio discrepancies for skeletal Class Ⅲ maloeelusions are larger than that for skeletal Class I and Class Ⅱ malocclusion.
出处
《上海口腔医学》
CAS
CSCD
2009年第3期251-254,共4页
Shanghai Journal of Stomatology
