Effect of Sodium Doping in β-Tricalcium Phosphate on Its Structure and Properties

For the preparation of β-TCP and biphasic calcium phosphates (BCPs, mixtures of hydroxyapatite and β-TCP), the presence of sodium in the reaction medium results in the incorporation of sodium in the β-TCP network, by substitution of some calcium sites. Accordingly, a decrease of the unit cell volume...

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Bibliographic Details
Published in:Chemistry of materials 2006-03, Vol.18 (6), p.1425-1433
Main Authors: Obadia, Laetitia, Deniard, Philippe, Alonso, Bruno, Rouillon, Thierry, Jobic, Stéphane, Guicheux, Jérôme, Julien, Marion, Massiot, Dominique, Bujoli, Bruno, Bouler, Jean-Michel
Format: Article
Language:English
Subjects:
Chemical Sciences
Material chemistry
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Summary:For the preparation of β-TCP and biphasic calcium phosphates (BCPs, mixtures of hydroxyapatite and β-TCP), the presence of sodium in the reaction medium results in the incorporation of sodium in the β-TCP network, by substitution of some calcium sites. Accordingly, a decrease of the unit cell volume of β-TCP was observed with increasing sodium substitution. The distribution of sodium in the β-TCP structure, as a function of the amount incorporated, was probed using 31P and 23Na MAS NMR and 31P{23Na} REDOR experiments. It was shown that an estimation of the sodium content in β-TCPs could be obtained from the modeling of their 31P MAS NMR spectra. Moreover, the incorporation of sodium in β-TCPs results in improved mechanical properties, without affecting the biocompatibility of the ceramics.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm052135f