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Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes
Journal article   Peer reviewed

Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes

Steven M. Kurtz, Jorge A. Ochoa, Chad B. Hovey and Christopher V. White
Journal of biomechanics, v 32(9), pp 967-976
1999
DOI: https://doi.org/10.1016/S0021-9290(99)00043-3
PMID: 10460134
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Acetabular component Contact stress Polyethylene: Metal-backing Relative motion
A sliding distance-based finite element formulation was implemented to predict initial wear rates at the front and back surfaces of a commercially available modular polyethylene component during in vitro loading conditions. We found that contact area, contact stress, and wear at the back surface were more sensitive to the liner/shell conformity than the presence of multiple screw holes. Furthermore, backside linear and volumetric wear rates were at least three orders of magnitude less than respective wear estimates at the articulating surface. This discrepancy was primarily attributed to the difference in maximum sliding distances at the articulating surfaces (measured in mm) versus the back surface (measured in μm). This is the first study in which backside wear has been quantified and explicitly compared with frontside wear using clinically relevant metrics established for the articulating surface. The results of this study suggest that with a polished metal shell, the presence of screw holes does not substantially increase abrasive backside wear when compared with the effects of backside nonconformity.

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37 citations in Web of Science
42 citations in Scopus

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Collaboration types
Industry collaboration
Domestic collaboration
Web of Science research areas
Biophysics
Engineering, Biomedical
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