安氏分类与矢状骨型分类的相关性分析

A correlation analysis between Angle's classification and sagittal maxillomandibular classification

目的 :探讨安氏分类与矢状骨型分类之间的相关关系。方法 :选取我科近 5年收治的正畸病例 3 61例 ,年龄 14～ 18岁。将样本按安氏分类法进行分类 ,统计出对应的矢状骨型分类的分布 ;再按矢状骨型分类法统计出对应的安氏分类的分布。将安氏分类及矢状骨型分类分别依Ⅲ类、Ⅰ类、Ⅱ类进行等级划分 ,应用Kendall等级相关分析法进行统计学分析。结果 :安氏分类与矢状骨型分类之间的相关系数τ =0 .464 3 ,有高度的统计学意义(u =4.3 68>2 .5 8,P <0 .0 1)。结论 :安氏分类与矢状骨型分类之间具有相关关系。安氏Ⅰ类对应的矢状骨型三类的分配比为 4∶1∶1;安氏Ⅱ类为 2∶1∶0 ;安氏Ⅲ类为 1∶0∶2。矢状骨型Ⅰ类对应的安氏三类的分配比为 3∶2∶1;矢状骨型Ⅱ类为 2∶3∶0 ;矢状骨型Ⅲ类为 1∶0∶3。

Objective:To evaluate the correlation relationship between Angle's classification and sagittal maxillomandibular classification.Method: The subjects comprised 361 patients from the orthodontic clinic in recent five years whose age were 14～18. All subjects were classified by Angle's classification into three kinds with casts; meanwhile the number and percentage corresponding to them were listed by sagittal skeletal classification with ANB measurement. Also all subjects were classified by sagittal skeletal classification into three kinds with ANB measurement, meanwhile the number and percentage corresponding to them were listed by Angle's classification. The ranks of Angle's classification and sagittal skeletal classification were arranged from class Ⅲ to class Ⅱ and classⅠrespectively. The correlation was analyzed with Kendall' rank analysis. Result: The coefficient (τ) of correlation between Angle's classification and sagittal skeletal classification was 0.4643. There was a higher statistic significance in the coefficient of correlation(u=4.368>2.58,P<0.01).Conclusion: There is a correlation relationship between Angle's classification and sagittal maxillomandibular classification. There is an approximate corresponding quantity distribution between the two classifications. Angle's class Ⅰcorresponds to sagittal skeletal classification (Ⅰ∶Ⅱ∶Ⅲ)4∶1∶1; Angle's class Ⅱ 2∶1∶0; Angle's class Ⅲ 1∶0∶2. Sagittal skeletal class Ⅰ corresponds to Angle's classification (Ⅰ∶Ⅱ∶Ⅲ) 3∶2∶1; Sagittal skeletal class Ⅱ 2∶3∶0; Sagittal skeletal class Ⅲ 1∶0∶3.