- 期刊
正常中國兒童骨骼發育之研究第1報：以成骨中心分析6至12歲學童之骨骼發育
Osseous Development in Normal Chinese Children. I. Study of the Development of Ossification Centers in Children from 6 to 12 Years old
並列摘要
For studying the osseous developmental pattern of normal Chinese children, a total of 76 ossification centers in both hands and wrists, and the right elbow and ankle of 318 boys and 316 girls from 6 to 12 years of age were studied by roentgenography. In all the children of 6 years of age examined, the following 54 ossification centers were already present: all those of the epiphyses of phalanges, metacarpals, capitate, hamate and epiphysis of radius of both hands and wrists, capitellum of the right elbow, and calcaneus, astragalus, navicular, cuboid, 3 cuneiforms, epiphysis of tibia and fibula of the right ankle. The presence of the other 22 ossification centers appeared increasingly in children up to 12 years of age and approximately followed the sequence of: triangular, lunate, lesser multangular, head of radius, greater multangular, carpal navicular, internal epicondyle of humerus, epiphysis of calcaneus, epiphysis of ulna, pisiform, olecranon, trochlea, external epicondyle of humerus and sesamoid. The interval between the age of the earliest appearance of each ossification center and. that of the latest appearance, or the age at which- all children showed that center, ranged from 3 to five and one half years, mostly from 4 to five and one half years. The ossification centers studied appeared earlier in females than in males. The ages at which the presence of the indi vidual ossification centers of epiphysis of ulna, pisiform, olecranon and trochlea of humerus exceeds 50% of children are 1, two and one half, two and one half and 2 years earlier in females than in males respectively. Comparison of the ossification centers in hands and wrists of both sides, in. number and size, does not show any significant difference. A practical method for evaluating the bone age of children is also described.