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Calcium carbonate-calcium phosphate mixed cement compositions for bone reconstruction

Combes, Christèle and Bareille, Reine and Rey, Christian Calcium carbonate-calcium phosphate mixed cement compositions for bone reconstruction. (2006) Journal of Biomedical Materials Research Part A, Vol. 7 (N°2). pp. 318-328 . ISSN 1549-3296

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Official URL: http://dx.doi.org/10.1002/jbm.a.30795

Abstract

The feasibility of making calcium carbonate-calcium phosphate (CaCO3-CaP) mixed cements, comprising at least 40 % (w/w) CaCO3 in the dry powder ingredients, has been demonstrated. Several original cement compositions were obtained by mixing metastable crystalline calcium carbonate phases with metastable amorphous or crystalline calcium phosphate powders in aqueous medium. The cements set within at most 1 hour at 37°C in atmosphere saturated with water. The hardened cement is microporous and exhibits weak compressive strength. The setting reaction appeared to be essentially related to the formation of a highly carbonated nanocrystalline apatite phase by reaction of the mestastable CaP phase with part or almost all of the metastable CaCO3 phase. The recrystallization of metastable CaP varieties led to a final cement consisting of a highly carbonated poorly crystalline apatite (PCA) analogous to bone mineral associated with various amounts of vaterite and/or aragonite. The presence of controlled amounts of CaCO3 with a higher solubility than the apatite formed in the well-developed calcium phosphate cements might be of interest to increase resorption rates in biomedical cement and favor its replacement by bone tissue. Cytotoxicity testing revealed excellent cytocompatibility of CaCO3-CaP mixed cement compositions.

Item Type:Article
Additional Information:http://www3.interscience.wiley.com/journal/30728/home/ProductInformation.html
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Institut National de la Santé et de la Recherche Médicale - INSERM
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université de Bordeaux 2 - Victor Segalen (FRANCE)
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Deposited By:Christele COMBES

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