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Ultra high molecular weight polyethylene (UHMWPE) that had been sterilized with 25 kGy of gamma radiation and non-sterile material processed from the same batch were studied following five years of ageing in air. Differential scanning calorimetry, small angle X-ray scattering, transmission electron microscopy, Fourier transform infra-red spectroscopy and density gradient column measurements were used...
Ultra-high molecular weight polyethylene has been used as the articulating surface in total joint replacements for over three decades. These polymer inserts are sterilized by gamma irradiation prior to implantation. Irradiation is known to alter the structure and properties of the UHMWPE over time. Understanding the evolution of these properties is critical for life prediction of the component. In...
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