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In vivo study on scaffolds based on chitosan, collagen, and hyaluronic acid with hydroxyapatite.
International Journal of Biological Macromolecules 2018 October 16
Scaffolds based on chitosan, collagen, and hyaluronic acid supplemented with nano-hydroxyapatite were obtained with the use of the freeze-drying method. Composites swelling behavior was assessed by the liquid uptake test. The adhesion and proliferation of human osteosarcoma SaOS-2 cells on the scaffolds were examined in 4-day culture. The biocompatibility of the chosen scaffolds was further studied by in vivo implantation into subcutaneous tissue of rabbits. The results showed low stability of the scaffolds based on chitosan, collagen, and hyaluronic acid supplemented with hydroxyapatite. The addition of hydroxyapatite delayed the degradation process of the obtained scaffolds. The X-ray images of the tissues surrounding the scaffolds showed that both, the control scaffold without hydroxyapatite (HAp) and those with addition of 50% wt. HAp underwent degradation after 6 months. However, the scaffolds supplemented with 80% wt. HAp premained in the implanted place. The results showed satisfactory tissue response on the implanted scaffolds.
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