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Predicting UHMWPE wear: decreasing wear rate following a change in sliding direction

Record type: Conference or Workshop Item (Poster)

The patient demographic for total joint replacement is becoming younger and more active leading to increased performance expectations [1]. To develop new products that meet these demands, computer simulations that predict wear are emerging as potential design tools [2]. The algorithms for these simulations typically assume a linear relationship between wear and sliding distance [3-5] and therefore do not account for the possibility of a variable wear rate along a path (Fig 1). In a previous study we demonstrated that the wear of crosslinked polyethylene did not depend on the sliding distance, rather on the number of crossing events (ie changes in direction) [6], implying that large portions of sliding did not contribute to the total wear. We were unable, however, to identify the transition from high wearing multidirectional sliding to the low wearing unidirectional sliding (Fig 1). The purpose of this study was to further investigate this transition by examining a broader range of sliding distances. We hypothesized that small increases in sliding distance after a direction change would produce additional cumulative wear while no additional wear would be produced at longer sliding distances sufficient to reestablish ‘unidirectional’ sliding.

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Citation

Dressler, M.R., Ross, M.A., Schlacter, A.J., Strickland, A.M., Taylor, M. and Ernsberger, C. (2010) Predicting UHMWPE wear: decreasing wear rate following a change in sliding direction At 56th Annual Meeting of the Orthopaedic Research Society, United States. 06 - 09 Mar 2010.

More information

Published date: 2010
Venue - Dates: 56th Annual Meeting of the Orthopaedic Research Society, United States, 2010-03-06 - 2010-03-09
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 202743
URI: http://eprints.soton.ac.uk/id/eprint/202743
PURE UUID: da957d0f-b9e0-4514-b913-6479c81a0fd4

Catalogue record

Date deposited: 09 Nov 2011 13:44
Last modified: 18 Jul 2017 11:10

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Contributors

Author: M.R. Dressler
Author: M.A. Ross
Author: A.J. Schlacter
Author: A.M. Strickland
Author: M. Taylor
Author: C. Ernsberger

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