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TECHNICAL PAPERS: Joint/Whole Body

Stresses in Polyethylene Liners in a Semiconstrained Ankle Prosthesis

[+] Author and Article Information
M. C. Miller

School of Health Sciences, Duquesne University, Pittsburgh, Pennsylvania 15212 USA; Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15621 USA; Department of Orthopaedic Surgery, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212 USA

P. Smolinski

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15621 USA

S. Conti, K. Galik

Department of Orthopaedic Surgery, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212 USA

J Biomech Eng 126(5), 636-640 (Nov 23, 2004) (5 pages) doi:10.1115/1.1798011 History: Received January 07, 2004; Revised April 08, 2004; Online November 23, 2004
Copyright © 2004 by ASME
Topics: Stress
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References

Figures

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Solid model of the lower leg
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Talar components used in this study
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von Mises stress on the Standard width polyethylene surface. (Neutral tibio-pedal angle.)
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Contact pressure along the frontal plane at the midline for both talar component designs. The talar component is centrally located relative to the 24 mm wide tibial component.
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von Mises stress 0.2 mm beneath the surface along the frontal plane at the midline for both talar component designs. The talar component is centrally located relative to the 24 mm wide tibial component.
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von Mises stress through the thickness (Standard width implant). Shown is an oblique view of the posterior half of the polyethylene insert.
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von Mises stress through the thickness, at the edge and at the center of a sagittal plane cut (Standard width component)
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von Mises stress and contact pressures in the polyethylene with respect to flexion angles at the midpoint of the talar components

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