Publikation: Zeitschriftenartikel

Influence ofaccelerated aging on the wear behavior of cross-linked polyethylene liners

Grunddaten
Abstract
Autoren
Einrichtungen

Grunddaten

Titel	Influence ofaccelerated aging on the wear behavior of cross-linked polyethylene liners
Untertitel	a hip simulator study
Erscheinungsjahr	2022
Seiten (von – bis)	1 – 10
Band	11
Heft-Nr.	15
Jahr	2022
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.3390/jcm11154487
Letzte Änderung	03.03.2023 06:02:00
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/69531
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Abstract

Sequential cross-linked and annealed ultra-high-molecular-weight polyethylene (SX-PE) is known as a low-wear articulating partner, especially for total hip endoprostheses. Aging of polymeric materials, irrespective of if induced by shelf or in vivo life, can degrade their tribological and mechanical properties. However, changes in wear behavior of aged SX-PE liners have not been not quantified so far. An accelerated aging procedure, to simulate shelf and in vivo aging, was performed on thin SX-PE liners after five million load cycles using a simulator ("worn-aged") as well as on new SX-PE liners ("new-aged"). A subsequent hip simulator test was performed with both thin SX-PE liner sets in combination with large-diameter ceramic femoral head, representing a combination known as advantageous for treatment after revision because of dislocation. Oxidation indices were measured on the liners after each step of the procedure. SX-PE liners after accelerated aging show bedding-in phases during simulator test, which was a characteristic only known from clinical investigations. Hence, the wear rates of the "new-aged" ((1.71 ± 0.49) mg/million cycles) and of the "worn-aged" ((9.32 ± 0.09) mg/million cycles) SX-PE were increased in the first period compared to new unaged SX-PE liners. Subsequently, the wear rates decreased for "new-aged" and "worn-aged" inserts to (0.44 ± 0.48) mg/million cycles and (2.72 ± 0.05) mg/million cycles, respectively. In conclusion, the results show promising effects of accelerated aging on SX-PE liners in simulator testing and for potential long-term use in clinical applications.

Autoren

Dammer, Rebecca
Zietz, Carmen
Reinders, Jörn
Teske, Michael
Bader, Rainer

Einrichtungen

UMR/Institut für Biomedizinische Technik

UMR/Orthopädische Klinik und Poliklinik (OUK)