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Tancret, F., Bouler, J. .-M., Chamousset, J. & Minois, L. .-M. (2006) Modelling the mechanical properties of microporous and macroporous biphasic calcium phosphate bioceramics. J. Eur. Ceram. Soc. 26 3647–3656.
Added by: Richard Baschera (2016-08-29 14:28:59) Last edited by: Richard Baschera (2016-08-29 14:56:55) |
| Type de référence: Article DOI: 10.1016/j.jeurceramsoc.2005.12.015 Numéro d'identification (ISBN etc.): 0955-2219 Clé BibTeX: Tancret2006a Voir tous les détails bibliographiques  |
Catégories: HORSIMN Mots-clés: apatite, biomaterials, bone ingrowth, Ceramics, fracture, fracture properties, initial-stage, Mechanical properties, minimum solid area, modelling, porosity, ratio, synthesis parameters, x-ray-diffraction Créateurs: Bouler, Chamousset, Minois, Tancret Collection: J. Eur. Ceram. Soc. |
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Macroporous biphasic calcium phosphate bioceramics, for use as bone substitutes, have been fabricated by cold isostatic pressing and conventional sintering, using naphtalen particles as a porogen to produce macropores. The resulting ceramics, composite materials made of hydroxyapatite and beta-tricalcium phosphate (TCP) containing similar to 45% macropores and with various microporosities, have been submitted to compression and three-point bending tests, toughness tests by single-edge-notched-bending (SENB), and spherical indentation tests. By combining two approaches at two different scales, one for closed porosity and one for open porosity, a model is established to describe mechanical properties as a function of the amount and morphology of porosity. The model assumes a quasi-continuous matrix containing macropores, the matrix being itself microporous, and considers that fracture always initiates on a macropore. The preliminary mechanical tests performed on the sintered ceramics tend to validate the modelling approach. (c) 2006 Elsevier Ltd. All rights reserved.
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