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【目的】 通过对正常婴幼儿、青少年及部分成年人骨皮质发育的横向观察 ,了解小儿骨皮质发育的规律。 【方法】 市郊农村健康婴儿 ,城区婴幼儿、青少年及部分成年人 ,共 10 17例摄右手腕正位X光片 ,测量第二掌骨中点横径及内径 ,用MicrosoftExcel 97软件计算出骨皮质厚度、皮质指数并作统计学处理。 【结果】 从 1岁组到15岁组男、女童骨皮质厚度分别增加了 3 .0 6mm及 2 .89mm ,平均年增幅分别为 4.0 %及 4.3 % ;婴儿期平均年增幅分别为 8.2 %及 6.9% ,从幼儿期到学龄前儿童分别为 2 .3 %及 2 .0 % ,11.0～ 13 .0岁组女童为 10 .7% ,13 .0～ 15 .0岁组男童为 7.8%。农村地区 1岁组婴儿第二掌骨中点横径同城区婴儿基本相同 ,但平均骨皮质厚度低 0 .3 9mm(P <0 .0 0 1)。 【结论】 骨皮质厚度随年龄增大而增加 ,婴儿期及青春期前后增厚显著 ,以青春期骨皮质增厚最明显。
【Objective】 To observe the regularity of cortical bone development in children through horizontal observation of cortical bone development in normal infants, adolescents and some adults. 【Method】 A total of 10 17 right anterior hand X-ray films were collected from healthy rural infants, urban infants, adolescents and some adults in the suburbs. The transverse and medial diameters of the second metacarpal were measured. The cortical bone mass was calculated using Microsoft Excel 97 Thickness, cortical index and for statistical analysis. 【Results】 The results showed that the cortical bone thickness of boys and girls increased by 3.06 mm and 2.89 mm respectively from 1 year old to 15 years old, with an average annual increase of 4.0% and 4.3% respectively. The average annual increase of infants was 8.2% 6.9%, from early childhood to preschool children were 2.3% and 2.0%, 11.0 ~ 13.0 years old girls was 10.7%, 13.0 ~ 15.0 years old group of boys was 7.8% . In rural areas, the mean midpoint diameter of the second metacarpal of 1-year-old infants was basically the same as that of infants in the same city, but the mean cortical bone thickness was 0.39 mm (P <0. 【Conclusion】 The thickness of cortical bone increases with age, with significant thickening before and after infancy and adolescence, with the most obvious cortical thickening in adolescence.