Orthopaedics | Materials | Polyethylenes | Which Medical Device
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Duration Stabilised Ultra High Molecular Weight Polyethylene (UHMWPE) was the first annealed (heated below melting temperature) crosslinked polyethylene. Crosslinking is achieved by irradiation, and so the manufacturing process involves irradiation followed by heating. Heating tends to reduce...
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Zimmer Longevity Highly Crosslinked Polyethylene The Longevity is Zimmer’s highly crosslinked polyethylene insert designed for total hip arthroplasty, launched in 1999. It is available as standard, 10° elevation, 20° elevation and 7 mm offset. (Zimmer.com, accessed 13/4/11) The...
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Marathon Cross-Linked Polyethylene is a third generation cross-linked polyethylene. The manufacturing process involves 5 MRad of gamma irradiation, followed by a thermal treatment which is said to reduce free radicals in the polyethylene, enhance material consolidation and reduce the oxidative...
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Following on from the Crossfire highly cross linked polyethylene manufactured by Stryker, the X3 was introduced to the market in 2005. The highly cross linked X3 polyethylene is manufactured by a process of repeated gamma irradiation (3Mrads, 3 exposures) and annealing, with a final...
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