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Stress Analysis of the Polyethylene Component in Total Ankle Arthroplasty: Effect of Thickness

[+] Author Affiliations
Karol Galik, Patrick Smolinski

University of Pittsburgh, Pittsburgh, PA

Stephen F. Conti

Allegheny General Hospital, Pittsburgh, PA

Mark C. Miller

Duquesne University, Pittsburgh, PA

Paper No. IMECE2003-42418, pp. 209-210; 2 pages
doi:10.1115/IMECE2003-42418
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Advances in Bioengineering
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-3710-6 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

A three-dimensional finite element model was constructed of the distal tibia and fibula and a semi-constrained ankle prosthesis (Agility™ system). Contact elements were used at the interface between the talar component and the polyethylene liner and the proximal tibia and fibular were loaded in the in vertical direction. The minimal thickness of the polyethylene liner was varied from 3 mm to 8 mm in 1 mm increments. The results showed that the liner contact pressure in the sagittal plane mid-line decreased from 20 MPa to 14 MPa with increasing thickness while the medial edge contact pressure increased from 26 MPa to 30 MPa.

Copyright © 2003 by ASME

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