Tradeoffs amongst fatigue, wear, and oxidation resistance of cross-linked ultra-high molecular weight polyethylene.
作者： Sara A. Atwood , Douglas W. Van Citters , Eli W. Patten , Jevan Furmanski , Michael D. Ries
DOI: 10.1016/J.JMBBM.2011.03.012
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摘要: Abstract This study evaluated the tradeoffs amongst fatigue crack propagation resistance, wear and oxidative stability in a wide variety of clinically-relevant cross-linked ultra-high molecular weight polyethylene. Highly re-melted materials showed good oxidation performance, but diminished resistance. annealed poor Moderately moderate Increasing radiation dose increased resistance decreased Annealing reduced less than re-melting, left susceptible to oxidation. appears occur because annealing below melting temperature after cross-linking volume fraction size lamellae, failed neutralize all free radicals. Alternately, re-melting appeared eliminate radicals, but, restricted by network cross-links, re-formed lamellae were fewer smaller which resulted is first simultaneously evaluate propagation, wear, oxidation, microstructure ultra-high. The tradeoff we have shown fatigue, performance critical material’s long-term success total joint replacements.
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