Summary
To increase the useful life of artificial joints, it is necessary to reduce the wear of artificial joint materials, in particular Ultrahigh-molecular-weight polyethylene (UHMWPE). To reduce the wear of UHMWPE, choice of counterface and improvement of UHMWPE itself appear to be two likely venues for exploration. First, the wear of UHMWPE against various disks was examined by a pin-on-disk device. As a result, it was shown that wear factor decreases in the order of titanium alloy, SUS316L, alumina ceramic, and zirconia ceramic. Second, to improve UHMWPE, the lightly crosslinked samples by γ-ray radiation were next compressed at 180–200°C, and crystallized by cooling to room temperature, thus obtaining a unique alignment of molecular chains. In comparison with wear factor of nontreated UHMWPE, that of improved UHMWPE was decreased. These results suggested that wear-resistant properties of UHMWPE were improved markedly by the unique alignment of the molecules in the crystalline phase.
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© 1999 Springer-Verlag Tokyo
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Oka, M., Hyon, S.H., Ohta, M., Nakamura, T., Ushio, Y., Toguchida, J. (1999). Methods to Reduce the Wear of Ultrahigh-Molecular-Weight Polyethylene. In: Imura, S., Wada, M., Omori, H. (eds) Joint Arthroplasty. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68529-6_11
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DOI: https://doi.org/10.1007/978-4-431-68529-6_11
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-68531-9
Online ISBN: 978-4-431-68529-6
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