ISSN:
0021-9304
Keywords:
calcium phosphate bone cements
;
compressive strength
;
microstructure
;
bone apatite
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Medicine
,
Technology
Notes:
The hardening properties of calcium phosphate cements in the CaHPO4-α-Ca3(PO4)2 (DCP-α-TCP) system have been investigated with interest focused on the compressive strength and microstructure development. Previous studies have shown that the addition of CaCO3 (CC) leads to a modification of the calcium-deficient apatite structure of the reaction product, which results in a material more similar to the apatite in bone mineral. The addition of 10% w/w of CC to the initial DCP-α-TCP powder mixture resulted, with time, in a retardation of the development of compressive strength. However, the optimum compressive strength reached values up to 40% higher than CC-free samples. This retarding effect also has been monitored as a function of the calcium to phosphorus (Ca/P) ratio of the DCP and α-TCP mixture, showing the importance to the final cement properties of the relative quantities of the reactants in the mixture. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 41, 560-567, 1998.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
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