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<title>Abstract</title><p>A composite membrane of the polymer, chitosan, and the silver-exchanged mineral phase, tobermorite, was prepared by solvent casting and characterised by scanning electron microscopy and Fourier transform infrared spectroscopy. The <italic>in vitro</italic> bioactivity, cytocompatibility and antimicrobial activity of the composite were evaluated with respect to its potential application as a guided tissue regeneration (GTR) membrane. The <italic>in vitro</italic> bioactivity was verified by the formation of hydroxyapatite on the surface of the membrane in simulated body fluid and its cytocompatibility was established using MG63 human osteosarcoma cells. The presence of silver ions conferred significant antimicrobial activity against <italic>S. aureus, P. aeruginosa</italic> and <italic>E. coli</italic>. The findings of this investigation have indicated that the chitosan-silver-tobermorite composite is a prospective candidate for GTR applications.</p

Bioactivity, biocompatibility and antimicrobial properties of a chitosan-mineral composite for periodontal tissue regeneration