Microstructural, mechanical and biological properties of hydroxyapatite - CaZrO3 biocomposites

The biofunctionalization of metal implants with bioactive ceramics arises as an appealing strategy for promoting their osseointegration, without impairing implants’ good mechanical resistance. In this work, biocomposites of hydroxyapatite - CaZrO3 were obtained by rate controlled sintering and their...

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Veröffentlicht in:Ceramics international 2019-05, Vol.45 (7), p.8195-8203
Hauptverfasser: Vassal, Mariana F., Nunes-Pereira, J., Miguel, Sónia P., Correia, Ilídio J., Silva, Abílio P.
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container_end_page 8203
container_issue 7
container_start_page 8195
container_title Ceramics international
container_volume 45
creator Vassal, Mariana F.
Nunes-Pereira, J.
Miguel, Sónia P.
Correia, Ilídio J.
Silva, Abílio P.
description The biofunctionalization of metal implants with bioactive ceramics arises as an appealing strategy for promoting their osseointegration, without impairing implants’ good mechanical resistance. In this work, biocomposites of hydroxyapatite - CaZrO3 were obtained by rate controlled sintering and their microstructure, mechanical properties, biological as well as the effect of stoichiometric calcium zirconate dopant on the decomposition of HA were analysed. The results obtained showed that the addition of CaZrO3 stabilizes the hydroxyapatite at least up to 1300 °C and inhibits the appearance of the α- and β-TCP phases. Moreover, the mechanical properties of the hydroxyapatite were improved with 10 wt% of CaZrO3, despite the increase of porosity. The in vitro assays demonstrated that the biocomposites were biocompatible, since they favoured human osteoblast cells adhesion and proliferation. All the data obtained emphasize the potential of these biocomposites for the aimed biomedical application.
doi_str_mv 10.1016/j.ceramint.2019.01.122
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subjects Bioactivity
Calcium zirconate
Ceramic biocomposites
Hydroxyapatite
Mechanical properties
title Microstructural, mechanical and biological properties of hydroxyapatite - CaZrO3 biocomposites
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