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Papers by Keyword: Hydroxyapatite-CaO

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Dental Ceramics Modified by Ternary Glass-Ceramic Coatings: Characterization and In Vitro Bioactivity Study

Authors: Xanthippi Chatzistavrou, Nikolaos Kantiranis, Lambrini Papadopoulou, Eleana Kontonasaki, Aldo Roberto Boccaccini, Petros Koidis, Konstantinos M. Paraskevopoulos

Abstract: In this study new ternary bioactive mixtures were investigated, which are appropriate for applications as coatings on the surface of dental ceramics. The fabrication of mixtures based on the combination of dental ceramic, hydroxyapatite and bioactive glass was demonstrated. The mixtures were characterized by FTIR, XRD and SEM and their bioactive behavior was investigated by immersion in Simulated Body Fluid (SBF). The ternary mixture consisted of a high fusing leucite-feldspathic dental ceramic which exhibited the highest bioactive behavior assigned to the characteristic crystal phases occurring under the specific heat treatment investigated.

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Sol-Gel Hydroxyapatite-CaO Composites: Fabrication and Bioactivity Studies

Authors: E. Hatzistavrou, Xanthippi Chatzistavrou, Lambrini Papadopoulou, Nikolaos Kantiranis, K. Chrissafis, Aldo Roberto Boccaccini, Konstantinos M. Paraskevopoulos

Abstract: In this study the fabrication and characterization of a novel sol-gel derived HAp-CaO composite material is investigated. The bioactive behavior of the fabricated composite was assessed by immersion studies in SBF. A brittle and weakly crystalline carbonate hydroxyapatite (HCAp) layer was found to develop few hours after the immersion in SBF confirming high bioactivity. The presence of CaO accelerates the formation of HCAp phase.