Abstract
Our purpose was to evaluate the osteoconduction potential of mixed bovine bone (MBB) xenografts as an alternative for bone grafting of critical-size defects in the calvaria of rats. After surgery, in the time intervals of 1, 3, 6, and 9 months, rats were killed and their skulls collected, radiographed and histologically prepared for analysis. The data obtained from histological analysis reported that the particles of MBB did not promote an intense immunological response, evidencing its biocompatibility in rats. Our results clearly showed the interesting evidence that MBB was not completely reabsorbed at 9 months while a small amount of newly formed bone was deposited by osteoprogenitor cells bordering the defect. However, this discrete bone-forming stimulation was unable to regenerate the bone defect. Overall, our results suggest that the properties of MBB are not suitable for stimulating intense bone regeneration in critical bone defects in rats.
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Acknowledgments
The authors would like to thank Dr. Flávio Monteiro Amado and Miss Daniele Santi Ceolin for exceptional technical support. This work was supported by CAPES (CAPES Foundation), FAPESP (The State of São Paulo Research Foundation—99/10655-5, 01/10707-7, and 04/08095-1), CNPq (National Council for Scientific and Technological Development—350084/03-3, 475721/2003-9, 505350/04-1 and 504.808/04-4).
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Accorsi-Mendonça, T., Zambuzzi, W.F., Bramante, C.M. et al. Biological monitoring of a xenomaterial for grafting: an evaluation in critical-size calvarial defects. J Mater Sci: Mater Med 22, 997–1004 (2011). https://doi.org/10.1007/s10856-011-4278-7
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DOI: https://doi.org/10.1007/s10856-011-4278-7