The mechanical response of a polyetheretherketone femoral knee implant under a deep squatting loading condition

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Lennert de RuiterNico Verdonschot

Abstract

The current study was designed to investigate the mechanical response of a polyetheretherketone-on-polyethylene total knee replacement device during a deep squat. Application of this high-demand loading condition can identify weaknesses of the polyetheretherketone relative to cobalt-chromium. This study investigated whether the implant is strong enough for this type of loading, whether cement stresses are considerably changed and whether a polyetheretherketone femoral component is likely to lead to reduced periprosthetic bone loss as compared to a cobalt-chromium component. A finite element model of a total knee arthroplasty subjected to a deep squat loading condition, which was previously published, was adapted with an alternative total knee arthroplasty design made of either polyetheretherketone or cobalt-chromium. The maximum tensile and compressive stresses within the implant and cement mantle were analysed against their yield and fatigue stress levels. The amount of stress shielding within the bone was compared between the polyetheretherketone and cobalt-chromium cases. Relative to its material strength, tensile peak stresses were higher in the cobalt-chromium implant; compressive peak stresses were higher in the polyether...Continue Reading

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Citations

Jul 21, 2020·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Andi Haris, Vincent Beng Chye Tan
Mar 15, 2020·Materials·Raelene M CowieLouise M Jennings
Apr 18, 2020·Frontiers in Bioengineering and Biotechnology·Joris De RoeckEmmanuel A Audenaert
Sep 21, 2019·EFORT Open Reviews·Mark Anthony Roussot, Fares Sami Haddad
Apr 14, 2021·The Journal of Prosthetic Dentistry·Ryan SloanAntheunis Versluis
Sep 3, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yuntong Liu, Dangsheng Xiong

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