PMID: 11924792Apr 2, 2002Paper

Similarity of bone ingrowth in rats and goats: a bone chamber study

Comparative Medicine
S van der DonkB W Schreurs

Abstract

Bone ingrowth has been studied extensively in rats by use of bone chambers. However, it is not known whether results in small animals, with respect to bone ingrowth processes, are similar in large animals, in which more realistic models are often used. Since the metabolic rate in small animals is, in general, higher than that in larger species, we hypothesized that bone ingrowth in chambers develops more rapidly in small animals. Therefore, identical bone chambers were placed in the tibias of rats and goats. After 6 and 12 weeks, histologic and histomorphometric examinations were carried out to measure bone and tissue ingrowth distances. Bone ingrowth was higher in both species at 12, compared with 6 weeks (P < 0.01). Tissue ingrowth in general (including soft tissue) was less in rats than in goats at both time periods (P < 0.001). However, bone ingrowth did not differ between species. Thus, when differences in size of an osseous defect are corrected for, there seems to be only little influence of differences in body size.

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