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  Screening of stabilized crosslinked polyethylene using a novel wear tester
 
 
Titel: Screening of stabilized crosslinked polyethylene using a novel wear tester
Auteur: M. Hoffmann
V. Gonzalez-Mora
R. Chiesa
A. Cigada
M.F. Stroosnijder
Verschenen in: Bio-medical materials and engineering
Paginering: Jaargang 12 (2003) nr. 4 pagina's 387-395
Jaar: 2003-03-27
Inhoud: A novel pin-on-disk type wear tester is described allowing a rapid screening of different types of polyethylene under both unidirectional and multidirectional sliding motion. The wear of four polyethylene materials sliding against a roughened CoCrMo alloy was evaluated: a non-irradiated UHMWPE, a UHMWPE irradiated with a dose of 25 kGy in air, and two types of crosslinked UHMWPE (100 kGy, air), which were subjected to a stabilization heat treatment in nitrogen at 155°C for 72 hours (XLPE I) and in water at 130°C for 72 hours (XLPE II), respectively. Under multidirectional sliding conditions both types of XLPE exhibited significantly less wear with respect to the 25 kGy irradiated UHMWPE and the non-irradiated UHMWPE, even under the rough counterface conditions applied. Under unidirectional sliding motion both types of XLPE exhibited the highest wear of all materials tested, because the orientation hardening effect acting under linear lubricated condition is less pronounced for crosslinked polyethylene.
Uitgever: IOS Press
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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