Comparison of the properties of annealed crosslinked (Crossfire[TM]) and conventional polyethylene as hip bearing materials.

From: Bulletin of the NYU Hospital for Joint Diseases | Date: December 22, 2002| Author: | Copyright information

Abstract

In 1998, orthopaedic manufacturers started to introduce highly crosslinked ultra-high molecular weight polyethylene (UHMWPE) for total hip replacement bearings. Today's highly-crosslinked UHMWPEs materials are irradiation processed with a total dose ranging between 50 and 105 kGy, depending upon the manufacturer. Each manufacturer has adopted a different route for producing their highly crosslinked UHMWPE that includes a combination of three important processing steps: an irradiation step, an intra or post-irradiation thermal processing step, and a sterilization ...

<0.05). A slight, but statistically significant, reduction in the ultimate displacement was observed in Crossfire[TM] relative to [N.sub.2]-Vac[TM]. However, the 4% relative difference in ultimate displacement between the two materials was not considered substantial. The initial peak load for the two materials was not significantly different (p>

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