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KMID : 0361619740090030300
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Journal of the Korean Orthopaedic Association
1974 Volume.9 No. 3 p.300 ~ p.306
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The Development and Ossification of the Clavicle in the Korean Fetuses
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Kim Sang-Soo
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Abstract
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Developmental process of the clavicle was studied on 35 cases of Korean fetuses of 9 to 300mm crown-rump length by histological observation and radiological study following silver impregnation, with the following results.
1. Primordia of the clavicle of the 14mm fetus were blastemal tissue, while that of the 110 to 130mm showed definite evidence of ossification center at the sternal and acromial ends as cartilagenous mass.
2. The membranous ,ossification center, which could be recognized in the 16 to 18mm fetuses, were two in number.
3. In the 24mm specimen the centers were shown to unite each other. forming a long single mass of bone and the 35mm the clavicle resumed growth as a long cartilagenous mass.
4. The development of the acromio-clavicuiar joint began in the 50mm specimen. as a cavity without the three-layered interzone which could commonly be recognized in developing joint of other long bone.
5. That the recognition of the ossification center was first :possible in the 45mm specimen by radiological study showed that this method was inferior to histological observation for detecting the ossification center.
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