Abstract
Calcification and fractures of costal cartilages were investigated in beagle dogs of both sexes aged from 3 months to 15 3/4 years. By soft x-ray radiography, calcification and minute fractures of costal cartilages were already observed at 6 months of age regardless of sexes, with a subsequent development with age. Complete fractures were frequently observed in dogs aged more than 11 years. By the analysis of four costal cartilages (1st, 5th, 9th, 12th or 13th), it was demonstrated that after 6 months of age the water content decreased rapidly together with marked increase in the organic matrix, ash, calcium and phosphorus contents. Histological examination of undecalcified specimens revealed that the matrix in the central zones was already calcified and minute fractures therein occurred at 6 months of age. These changes gradually expanded from the central to the peripheral zone with age. At 9 months of age, the calcified cartilage altered to an osseous tissue similar to that of trabecular bones, showing a normal histomorphological dynamics thereafter. It is concluded that the observed sequence of calcification and fracture of costal cartilage is a normal and age-related change which occurs after 6 months of age.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Nihon juigaku zasshi. The Japanese journal of veterinary science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
