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Published on: February 23, 2017
Influence of Ringer's solution on creep resistance of hydroxyapatite reinforced polyethylene composites
J Suwanprateeb1, K E Tanner, S Turner
1Interdisciplinary Research Centre in Biomedical Materials, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK.
Abstract:
In vitro creep studies of polyethylene, both unfilled and filled with hydroxyapatite at 0.20 and 0.40 volume fraction, have been performed. The samples were immersed in Ringer's solution at 37 degrees C for 1, 7, 30, 90 and 150 days prior to isochronous and creep tests in the same condition. The creep properties of unfilled polyethylene is unaffected by the immersion, but the isochronous modulus and the creep resistance of filled polyethylene were reduced. The effect increased with increasing volume fraction and time of immersion. This reduction is related to the penetration of the solution into the material, softening the interface.
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