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Composition and properties of silver-containing calcium carbonate–calcium phosphate bone cement

Abstract : The introduction of silver, either in the liquid phase (as silver nitrate solution: Ag(L)) or in the solid phase (as silver phosphate salt: Ag(S)) of calcium carbonate–calcium phosphate (CaCO3–CaP) bone cement, its influence on the composition of the set cement (C-Ag(L)and C-Ag(S) cements with a Ca/Ag atomic ratio equal to 10.3) and its biological properties were investigated. The fine characterisation of the chemical setting of silver-doped and reference cements was performed using FTIR spectroscopy. We showed that the formation of apatite was enhanced from the first hours of maturation of C-Ag(L) cement in comparison with the reference cement, whereas a longer period of maturation (about 10 h) was required to observe this increase for C-Ag(S) cement, although in both cases, silver was present in the set cements mainly as silver phosphate. The role of silver nitrate on the setting chemical reaction is discussed and a chemical scheme is proposed. Antibacterial activity tests (S. aureus and S. epidermidis) and in vitro cytotoxicity tests (human bone marrow stromal cells (HBMSC)) showed that silver-loaded CaCO3–CaP cements had antibacterial properties (anti-adhesion and anti-biofilm formation) without a toxic effect on HBMSC cells, making C-Ag(S) cement a promising candidate for the prevention of bone implant-associated infections.
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Submitted on : Tuesday, May 19, 2015 - 9:41:52 AM
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Sylvaine Jacquart, Robin Siadous, Christel Henocq-Pigasse, Reine Bareille, Christine Roques, et al.. Composition and properties of silver-containing calcium carbonate–calcium phosphate bone cement. Journal of Materials Science: Materials in Medicine, Springer Verlag, 2013, Vol. 24 (n° 12), pp. 2665-2675. ⟨10.1007/s10856-013-5014-2⟩. ⟨hal-01153078⟩



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