Abstract: Silver nanoparticles induce many beneficiate effects in biomedical materials when it is used in good dose. Silver is generally recognized by its inhibitory effect towards many bacterial strains and microorganisms commonly present in medical and industrial processes. In this work, hydroxyapatite/polyvinylpyrrolidone was doped with two different concentrations of silver nanoparticles prepared by reduction method.
Physicochemical characterization of compounds was carried out by using TEM, SEM and XRD methods. They permit to highlight the structural and morphological behavior of nano biomaterials after addition of Silver. The chemical reactivity and kinetic of bioactivity were studied. Ionic exchanges between compounds and SBF were achieved by using ICP-OES method. It is demonstrated that silver doped nanohydroxyapatite obviously improve the bioactivity of the apatite at the early stages of immersion. Hydroxyapatite was elaborated in the presence of plyvinylpyrrolidone (HA/PVP).
Obtained results show that the particles seemed to be like fibers with at least more than 100 nm in length and 10-20 nm in diameter.

Brief Biography of the Speaker:
Hassane Oudadesse graduated from the University Blaise Pascal of Clermont-Ferrand France. He obtained his PhD in 1989 and worked as associate Professor and obtained his HDR (Habilitation a Diriger des recherches) in 1998. Since 2001, he works in the University of Rennes 1 as Full Professor in the "Sciences Chimiques de Rennes", UMR CNRS 6226.
His works concern the conception, synthesis and physicochemical studies of new biomaterials for applications in orthopaedic surgery. Biocompatibility, kinetic of bioactivity, kinetic of bio consolidation in the interface bone-Implants, cells enhancement and other properties of biomaterials present the research filed of Professor Hassane Oudadesse.
He is author of more than 80 articles published in international journals and 50 international conferences.
Professor Hassane Oudadesse is a Head of the research unit on Biomaterials since 2001, Vice-President of University of Rennes 1, human resources since 2008, Director of Master 2 Solid State Chemistry and Materials since 2006. He was the President of the Chemical Department from 2002 to 2004 and the President of the specialists commission CNU 33 (Materials Chemistry) from 2003 to 2008.