Failure risk assessment of TKA designs incorporating highly crosslinked UHMWPE

S. M. Kurtz, T. Harrigan, J. S. Bergström, C. M. Rimnac

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The approach, aimed at quantifying the failure risk in highly crosslinked ultrahigh molecular weight polyethylene (UHMWPE) components for TKA was described. The nonconforming contact geometries of a TKA during flexion were represented using a cylinder-on-flat configuration. The approach incorporated the hybrid constitutive model (HM) which was more accurate than the isotropic plasticity model in simulating large deformation behavior leading up to failure. Four UHMWPE materials were investigated, unirradiated, sterilized, 100kGy crosslinked and annealed at 110°C, and 100 kGy crosslinked and remelted at 150°C. The HM model predcited peak residual stresses that were markedly smaller than those predicted using the isotropic plasticity model.

Original languageEnglish (US)
Title of host publicationTransactions - 7th World Biomaterials Congress
Number of pages1
StatePublished - Dec 1 2004
Externally publishedYes
EventTransactions - 7th World Biomaterials Congress - Sydney, Australia
Duration: May 17 2004May 21 2004

Publication series

NameTransactions - 7th World Biomaterials Congress

Other

OtherTransactions - 7th World Biomaterials Congress
CountryAustralia
CitySydney
Period5/17/045/21/04

ASJC Scopus subject areas

  • Engineering(all)

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