Wear Characteristics of Conventional Ultrahigh-Molecular-Weight Polyethylene Versus Highly Cross-Linked Polyethylene in Total Ankle Arthroplasty

Foot & Ankle International
Oliver N SchipperMarkus A Wimmer

Abstract

The aim of this study was to compare the polyethylene wear rate, particle size, and particle shape of primary semiconstrained, fixed-bearing, bone-sparing total ankle arthroplasty using conventional ultrahigh-molecular-weight polyethylene (CPE) versus highly cross-linked polyethylene (HXLPE) by applying a level walking input using a joint simulator. Two fixed-bearing total ankle replacement systems with different types of polyethylene liners were tested: (1) CPE sterilized in ethylene oxide, and (2) HXLPE sterilized with gas plasma after electron beam irradiation. Three implants for each design underwent wear testing using gravimetric analysis over 5 million simulated walking cycles. A fourth implant was used as a load soak control. Equivalent circle diameter (ECD) and equivalent shape ratio (ESR) were computed to determine particle size and particle shape, respectively. The mean wear rate from 1.5 to 5 million cycles (MC) was 2.0 ± 0.3 mg/MC for HXLPE and 16.7 ± 1.3 mg/MC for CPE ( P < .001). The total number of particles per cycle generated for HXLPE and CPE were 0.17 × 106 particles/cycle and 0.53 × 106 particles/cycle, respectively ( P < .001). The mean ECD of HXLPE particles (0.22 ± 0.11 μm) was significantly smaller than ...Continue Reading

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Citations

Nov 23, 2019·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Yanwei ZhangZhongmin Jin
Mar 10, 2020·JBJS Reviews·Angela MujukianSophia N Sangiorgio
Mar 19, 2020·The Journal of Bone and Joint Surgery. American Volume·Timothy R DanielsJoyce M Fu
Aug 4, 2020·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Yanwei ZhangZhongmin Jin
Dec 22, 2020·Foot & Ankle International·Nabil MehtaDaniel D Bohl
Jul 22, 2021·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Marwa Ben BrahamSamir Hamza

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Methods Mentioned

BETA
total ankle arthroplasty
total hip arthroplasty
chemical treatment
ESR
total

Software Mentioned

Image J

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