中国人髋关节中心边缘角正常值的测量

目的 通过测量1 494例正常骨盆正位片的中心边缘角(center-edge angle,CEA),得出国人髋关节CEA的正常值范围,指导临床阅读骨盆正位片.方法 测量4岁以后健康人群骨盆正位片的CEA,4～18岁按年分组,>18岁每10年分为一组.同时采用Ⅲ型髓臼2种CEA测量方法 (经典CEA和改良CEA),统计分析测得的各个年龄组的正常参考值和数值-年龄变化曲线.结果CEA 4岁时为21.62°,9岁时增大至25.07°,18岁时增大为32.14°,18岁之后,CEA基本在30°～34°波动.Ⅲ型髋臼主要见于4～9年龄组,这时二种CEA测量相差10°～12°左右.结论 10～14岁是CEA快速增大期,Ⅲ型髋臼主要见于4～9岁年龄组,此时经典CEA>25°且改良CEA>15°可认为是正常的.

The measurement of center-edge angle of hips in a healthy Chinese population

Objective To define the value of the center-edge angle (CEA) of normal hips in a healthy Chinese population. Methods The classical center-edge angle (CCEA) and modified center-edge angle (MCEA) were measured on the anterior-posterior pelvic radiographs of 1494 healthy Chi-nese older than 4 years. According to their ages,the enrolled individuals were divided into different groups: in the individuals aged 4 to 18 years old,they were grouped by year; in the individuals over 18,they were grouped by 10 years. The reference range of each group and the CEA corresponding to age were analyzed statistically. Results The mean CEA of 4-year-old group was 21.62°,which in-creased to 25.07° in 9-year-old group and to 32.14° in 18-year-old group. In healthy individuals over 18 years old,it fluctuates between 30° and 34°. Type Ⅲ acetabular rooves according to Ogata classifi-cation mainly appears in 4-9 years old groups,in which the difference between CCEA and MCEA is 10-12°. Conclusions CEA increases fast from 10 to 14 years old. Type Ⅲ acetabular rooves mainly ap-pears in 4-9 years old groups,when it is normal if CCEA is above 25°and MCEA is above 15°.