Longitudinal growth of long bones
Longitudinal growth of long bones
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DOI：
10.1001/archsurg.1935.01180160064005
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发表时间：
1935-10-01
影响因子：
--
通讯作者：
Bisgard, ME
中科院分区：
文献类型：
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作者：
Bisgard, JD;Bisgard, ME
为了测量山羊每个主要长骨的长度增长，在肱骨、桡骨、尺骨、股骨和胫骨的骨干两端钻孔，并在动物新生时（2 - 4天）将铅弹紧密地安装在这些孔中。在16个月的时间内定期拍摄X线照片，研究生长的进展。产前生长进行了研究和测量，从生长停滞线，在山羊胚胎喂养P的母亲。这些研究表明，出生前后，长骨长度的所有生长都发生在骨干的末端，通过骨干末端与骨骺软骨之间以及关节软骨与骨骺之间的新骨层的渐进并置。每根骨头两端的生长比例是不相等的。肱骨的长度主要从其近端开始，桡骨和尺骨从其远端开始，股骨从其远端开始，胫骨从其近端开始。实际测量得到的结果与迪格比对人类相同骨骼的计算结果一致，从而确立了他的数字的准确性，而这些数字以前只是一个假设的基础。此外，还观察了各骺软骨的生长速度和生长与生长活动期的关系。
To measure the growth in length of each principal long bone of goats, holes were drilled in both ends of the shaft of the humerus, radius, ulna, femur and tibia and lead shots were fitted tightly in these holes when the animals were newborn (from 2 to 4 days old). The progress of growth was studied in roentgenograms made periodically over a period of 16 months. Prenatal growth was studied and measured from growth arrest lines, produced in goat embryos by feeding P to the mothers. These studies showed that both before and after birth, all growth in the length of long bones takes place at the ends of the shaft by progressive apposition of layers of new bone between the ends of the diaphysis and 1he epiphyscal cartilage and between the articular cartilage and the epiphysis. The proportion of growth from the 2 ends in each bone is unequal. The humerus in length mainly from its proximal end, the radius and ulna from their distal ends, the femur from its distal end, the tibia from its proximal end. These results obtained by actual measurements agree with those calculated by Digby for the same bones in man, thus establishing the accuracy of his figures which previously had only a hypothetical basis. Also, there were made observations relative to the rate of growth and the relation of growth to the period of growth activity of each epiphyseal cartilage.