Newly developed Sr-substituted alpha-TCP bone cements
authors Pina, S; Torres, PM; Goetz-Neunhoeffer, F; Neubauer, J; Ferreira, JMF
nationality International
journal ACTA BIOMATERIALIA
author keywords Strontium; Brushite; Bone cement; XRD; Rietveld refinement
keywords CALCIUM-PHOSPHATE CEMENTS; TRICALCIUM PHOSPHATE; CRYSTAL-STRUCTURE; BRUSHITE CEMENTS; PARTICLE-SIZE; STRONTIUM; HYDROXYAPATITE; REACTIVITY; KINETICS; POLYMERIZATION
abstract New bone cements made of Sr-substituted brushite-forming a-tricalcium phosphate (alpha-TCP) were prepared and characterized in the present work The quantitative phase analysis and structural refinement of the starting powders and of hardened cements were performed by X-ray powder diffraction and the Rietveld refinement technique Isothermal calorimetry along with setting time analysis allowed a precise tracing of the setting process of the pastes The pastes showed exothermic reactions within the first 10-15 min after mixing and further release of heat after about I h An apatitic phase formed upon immersion of the hardened cements in simulated body fluid for 15 and 30 days due to the conversion of brushite into apatite confirming their in vitro mineralization capability. The compressive strength of the wet cement specimens decreased with increasing curing time, being higher in the case of Sr-substituted CPC. The results suggest that the newly developed Sr-substituted brushite-forming alpha-TCP cements show promise for uses in orthopaedic and trauma surgery such as in filling bone defects (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd All rights reserved.
publisher ELSEVIER SCI LTD
issn 1742-7061
year published 2010
volume 6
issue 3
beginning page 928
ending page 935
digital object identifier (doi) 10.1016/j.actbio.2009.09.001
web of science category Engineering, Biomedical; Materials Science, Biomaterials
subject category Engineering; Materials Science
unique article identifier WOS:000274943500024
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journal impact factor 6.383
5 year journal impact factor 7.160
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