Morphological characterization of chondroid bone in the alveolar crest of the neonatal rat mandible

• Published in: Japanese Journal of Oral Biology Vol. 33; no. 4; pp. 396 - 399
• Main Authors: Akimoto, Azusa, Sasa, Ryuji, Segawa, Kazuyuki, Takiguchi, Reiji
• Format: Journal Article
• Language: English
• Published: Japanese Association for Oral Biology 1991
• ISSN: 0385-0137
• DOI: 10.2330/joralbiosci1965.33.396

“Chondroid bone tissue” has primarily been given definition of the term by Enlow1,2) and Orban3), who found it in the crest of the alveolar process of mandible and the trabecular apex of the femur. Beresford4), described in his general article on chondroid bones that they share bony and cartilaginous characteristics:the matrix appeared to be mineralized collagenous structure containing ground substances stained with alcian blue, and the cells are large and spheroid. Hyusseune et al.5,6) indicated in the light microscopic studies on chondroid bone between the upper pharyngeal jaw and the neurocranial base in the fish Astatotilapia elegans that the matrix of the chondroid bone is basophilic and the cells are considerably large and very like hypertrophic chondrocytes. Recent studies in our laboratory proceed to elucidate the nature of “chondroid bone”:the light and electron microscopic investigations have manifested that the chondroid bone appears in the crest of the mandibular alveolar process of neonatal rat and human fetus, the cells are similar in configuration to mature chondrocytes, and the matrix contains typical Type I collagen fibrils and ground substances wellstained with toruidin blue7-10).