![]() Making of conventional polyethylene (CPE) This article focuses on 1) processing of PE, 2) packaging and sterilization techniques, 3) mechanical and wear properties of the final product, and 4) product options available from different implant manufacturers. Further, various PE designs such as cruciate-retaining, posterior-stabilized, medial congruent, medial pivot, anterior stabilized, constrained poly with a longer and wider post, bicruciate stabilized components can influence the mechanical forces transmitted at the area of contact and contribute to wear. Some of them are methods of PE processing (packaging, sterilization), type of implants, the thickness of the PE, locking mechanisms, surface roughness of the metallic tibial tray, surface contour of PE and area of articulation with the femoral component, types of movements between the bearing surfaces (rolling, sliding, and rotational motion), presence of third body wear, alignment inaccuracies and patient-related factors like body mass index (BMI), and patient activity level. PE wear is one of the common causes of revision knee replacement. Polyethylene (PE) is an integral part of total knee replacement (TKR) and has undergone significant changes in the last three decades.
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