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Open Access Similarity of Bone Ingrowth in Rats and Goats: A Bone Chamber Study

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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.

Document Type: Research Article

Affiliations: 1: Orthopedic Research Laboratory, Department of Orthopedics, University Medical Center Nijmegen, P.O. Box 9101, 6500HB Nijmegen, The Netherlands 2: Department of Orthopedics, Lund University Hospital, Lund, Sweden and Department of Orthopedics, University Hospital, Linkoping, Sweden

Publication date: August 1, 2001

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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