Development of sintered all-UHMWPE composites for joint implant sockets

Nemes-Károly, István and Szebényi, Gábor (2024) Development of sintered all-UHMWPE composites for joint implant sockets. In: ECCM21 – 21st European Conference on Composite Materials, 2024.07.02-2024.07.05., Nantes.

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Abstract

Improving living conditions and health achievements have led to a significant increase in our average life expectancy. One solution for destroyed joints is the implantation of joint implants, which is one of the most successful surgical procedures [1]. The most commonly used design is the metal-polymer artificial joint. This usually means that one of the surfaces that move on top of the other is a metal alloy of some kind, while the other is a plastic - usually ultra-high molecular weight polyethylene (UHMWPE). The most common cause of failure is wear of the UHMWPE, and a very significant proportion of revision surgery [2]. In our study, we developed a sintered homocomposite substitute for the UHMWPE insert, where the matrix material was a UHMWPE powder, well-established and popular in the implant industry, and the reinforcing material was UHMWPE fiber used as a suture and fixation material. Very importantly, both the matrix and the reinforcing material are medically certified and made of the same material, so that no compatibility problems arise during composite manufacturing. After a long series of iterations, it was possible to adjust the manufacturing technology to produce test specimens that are more wear-resistant and harder than traditionally used inserts.

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