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A comparative physico-chemical study of chlorapatite and hydroxyapatite: from powders to plasma sprayed thin coatings

Demati, Imane and Grossin, David and Combes, Christèle and Parco, Maria and Braceras, Inigo and Rey, Christian A comparative physico-chemical study of chlorapatite and hydroxyapatite: from powders to plasma sprayed thin coatings. (2012) Biomedical Materials, 7 (5). 1-10. ISSN 1748-6041

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Official URL: http://dx.doi.org/10.1088/1748-6041/7/5/054101

Abstract

Due to their bioactivity and osteoconductivity, hydroxyapatite (HA) plasma sprayed coatings have been widely developed for orthopedic uses. However, the thermodynamic instability of HA leads frequently to a mixture of phases which limit the functional durability of the coating. This study investigates the plasma spraying of chlorapatite (ClA) powder, known to melt without decomposition, onto pure titanium substrates using a low energy plasma spray system (LEPS). Pure ClA powder was prepared by a solid gas reaction at 950° C and thermogravimetric analysis showed the good thermal stability of ClA powder in the range 30-1400° C compared to that of the HA powder. Characterization of ClA coating showed that ClA had a very high crystalline ratio and no other crystalline phase was detected in the coating. HA and ClA coatings composition, microstructure and in vitro bioactivity potential were studied, compared and discussed. In vitro SBF test on HA and ClA coatings revealed the formation of a poorly crystalline apatite on the coating surface suggesting that we could expect a good osteoconductivity especially for the ClA coating prepared by the LEPS system.

Item Type:Article
Additional Information:Thanks to IOPs editor. The definitive version is available at http://iopscience.iop.org The original PDF can be found at Biomedical Materials website: http://iopscience.iop.org/1748-605X/7/5/054101/
HAL Id:hal-00864113
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Centro Investigacion Biomedica en Red Bioingenieria, Biomateriales y Nanomedicina - CIBER-BBN (SPAIN)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Tecnalia (SPAIN)
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Deposited By: cirimat webmestre
Deposited On:20 Sep 2013 11:19

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