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PORELEASE Résumé de rapport

Project ID: G5RD-CT-1999-00044
Financé au titre de: FP5-GROWTH
Pays: France

Improvement of the analysis procedures of Ca-P ceramic samples

FTIR spectroscopy and X-rays diffraction (XRD) techniques have been used to control the purity of the synthesised calcium phosphate powders and of the produced ceramics as well as to evaluate the modifications of explanted scaffold from small animals. Improvements of existing methods have been achieved to identify and quantify the main impurities, to evaluate the ceramic HA/TCP ratio, the organic matrix deposition and bone neoformation on explanted calcium phosphate scaffolds. Surface composition and physical properties changes can interfere with the sintering process as well as with the biological behaviour of the bioceramics. Mg and carbon have been identified by X-ray photoelectron spectroscopy (XPS) and surface energy determined by the contact angle method (Owens-Wendt theory).

All these surface and bulk improved characterisation procedures will be published as they can be applied to other samples in other programs. The proceedings of the Bioceramics 16th conference held in Porto in 2003 were published (Processing of Ca-P ceramics, surface characteristics and biological performance by S. Cazalbou et al, Key Engineering Materials, vols. 254-256 (2004), 833-836). The writing of another manuscript on the improvement of the analysis procedures of explanted Ca-P ceramic samples is in progress


Christian REY, (Professor)
Tél.: +33-5-62885635
Fax: +33-5-62885773