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Published online by Cambridge University Press: 20 January 2012
In this study, Ag doped hydroxyapatite (HA) samples prepared by EDTA chelatedecomposition method were characterized with X-Ray Diffraction Spectroscopy(XRD), Scanning Electron Microscopy (SEM) and antimicrobial sensitivitytest. Hydroxyapatite (Ca10(PO)6(OH)2) and NaCaPO4 (rhenanite) phases were observed while Ag was presentin the form of Ag2O. Results showed that microstructurallycontrolled HA-based composites with NaCaPO4 interphase can beprepared, which significantly enhances sinterability of hydroxyapatite at1100° C without formation of any undesired second phases, such as tricalciumphosphate (TCP) known to decrease the stability of HA. The antibacterialsensitivity was tested with E.Coli gram-negative bacteria. The radius ofcircle enclosing the sample increases with increasing Ag content in thestructure as an indication of the region of non-bacterial activity.