锁骨皮质指数测量

Measurement of Cotucal of Human Clavicle

本文测量６１４例（１２２８侧）锁骨中点皮质指数（即中点皮质厚度／中点皮质骨横径）。结果显示：左侧锁骨中点皮质指数为０．４５±０．１７．右侧为０．４４±０．１８．左、右侧比较无显著性差异（Ｐ＝０．０５）。年龄分组研究显示，５０岁以后锁骨中点皮质指数明显减小（Ｐ＜０．０１）。２１～５０岁男、女两组双侧锁骨中点皮质指数均有显著性差异（Ｐ＜０．０１～０．０５）．小于２０岁或大于５０岁均无显著性差异（Ｐ＞０．０５）。本研究显示：人群中双侧锁骨皮质增减速度是相等的；２１～５０岁之间男、女性由于生理上的差异可使锁骨皮质增减形成时间差，但２０岁以前或５０岁以后则无差别；女性骨发育成熟早，衰退也迅速，男性骨发育成熟慢，衰退也缓慢；人群中５０岁以后骨质出现疏松，并随年龄增加而加剧。

We calculated the cental index of clavicular cortex(i.e.central-point thick of clavicular cortex/central-point diameter of clavicule)from figures measured on chest X-ray films of 614 persons(l228 clavicles). The results showed that the cenrtal index of clavicular cortex was 0. 45 ±0. 17 on the left,0. 44±0. 18 on the right.the both were no difference (P> 0.05).The index was notably decreasedafter fifty years old in people( P<0.0 l)and distinguished difference berween male from female groups aged twenty to fifty (P<0.01￣0.05).but it was difference before twenty or after fifty years old in persons(P>0.05).The conclusions including:(1)the change of clavicular cortex on the left and right was same;(2)the change of clavicular cortex was difference bewteen male from female groups aged twenty to fifty according to physi-ologic difference; (3)the matturity and decline of bone in female were earlier than in male;(4)the osteoporo-sis waqs occured in persons who were superior to fifty years old and aggrevated with age increasing.