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An ionically crosslinked hydrogel containing vancomycin coating on a porous scaffold for drug delivery and cell culture
A total of 90 scaffolds were implanted and 95%were recovered at the site of injection. All of these scaffolds successfully rehydrated and 80%recovered and maintained their original 3-dimensional shape for 6 months. Scaffold volume and tissue infiltration varied depending on the degree of alginate cross-linking. Highly cross-linked materials (20%and 35%) demonstrated the best volume maintenance with the latter facilitating the most tissue infiltration. The inflammatory response was minimal except with the 80%cross-linked material. Calcification was not observed in covalently cross-linked scaffolds. In contrast, 98%of calcium alginate implants were calcified.
Shape retaining porous hydrogels meet many of the requirements necessary for a successful injectable bulking agent and offer advantages over currently used agents.
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An ionically crosslinked hydrogel containing vancomycin coating on a porous scaffold for drug delivery and cell culture