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Osteogenesis in the basioccipital bone of the Wistar albino rat
Author(s) -
VILMANN HENNING
Publication year - 1972
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1972.tb00306.x
Subject(s) - synchondrosis , endochondral ossification , anatomy , cartilage , biology , chemistry
– Osteogenesis of the basioccipital bone in the Wistar albino rat has been studied in histologic serial sections from 16 d p.c. to 5 d after birth. It was observed that the arrangement in developmental stages of the cartilage cells of the model and the appearance of the front of disintegration of chondrocytes differ from those described for long bones. Furthermore, a typical zonal arrangement of the cells in the area of the future synchondrosis sphenooccipitalis was observed. This arrangement is proposed to be related to the angular changes which take place between the basioccipital and the basisphenoid models at this age level. The development of a periosteal bone collar commenced on the cerebral surface in the central part of the model. The bone formation proceeded differentially. This in combination with differential growth of the part of the cartilage model not yet covered by bone, gave rise to a characteristic appearance of the bone at 21 d p.c. At 1 d after birth a marked resorption on the cerebral surface was observed in the posterior part of the bone. In fact, endochondral bone was formed and immediately resorbed. This phenomenon gives rise to a rare paradox: the bone grows cerebrally, while it in fact moves pharyngeally.