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Induced Stresses and Shell/Liner Micromotions in THA Components During Dislocation: A Finite Element Study

[+] Author Affiliations
Francisco Romero, Farid Amirouche, Mark Gonzalez

University of Illinois at Chicago, Chicago, IL

Todd Render

DePuy Orthopeadics, Warsaw, IN

Paper No. IMECE2002-32614, pp. 421-422; 2 pages
doi:10.1115/IMECE2002-32614
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advances in Bioengineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-3650-9 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

During total hip replacement (THR) many supporting structures for the retention of the femoral head within the acetabulum are removed. Previous studies have determined that this lack of supporting structures leads to separation of the femoral head within the UHMWPE liner. During the relocation phase the femoral head impacts with the liner creating high stress conditions that may contribute to premature polyethylene wear and instabilities.

Copyright © 2002 by ASME

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