Abstract
This work investigates the impact of chemical and physical treatments on biocompatibility for human bone/tendon tissues. Nontreated and treated tissues were compared. In vitro testing assessed indirect and direct cytotoxicity. Tissues were subcutaneously implanted in rats to assess the immunological, recolonization, and revascularization processes at 2–4 weeks postimplantation. No significant cytotoxicity was found for freeze-dried treated bones and tendons in comparison to control. The cellular adhesion was significantly reduced for cells seeded on these treated tissues after 24 h of direct contact. A significant cytotoxicity was found for frozen treated bones in comparison to freeze-dried treated bones. Tissue remodeling with graft stability, no harmful inflammation, and neo-vascularization was observed for freeze-dried chemically treated bones and tendons. Frozen-treated bones were characterized by a lack of matrix recolonization at 4 weeks postimplantation. In conclusion, chemical processing with freeze-drying of human tissues maintains in vitro biocompatibility and in vivo tissue remodeling for clinical application.
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Acknowledgments
This work was supported by grants from the “Foundation Salus Sanguinis.” We are grateful to all members of University Tissue Bank for tissue procurement and processing. We thank G. Beaurin for his expert technical assistance and P. Segers for her editorial help.
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Fawzi-Grancher, S., Goebbels, R.M., Bigare, E. et al. Human tissue allograft processing: impact on in vitro and in vivo biocompatibility. J Mater Sci: Mater Med 20, 1709–1720 (2009). https://doi.org/10.1007/s10856-009-3726-0
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DOI: https://doi.org/10.1007/s10856-009-3726-0