Polyethylene wear debris produced in a knee simulator model: Effect of crosslinking and counterface material

Paul A. Williams; Cindy M. Brown; Riichro Tsukamoto; Ian C. Clarke

doi:10.1002/jbm.b.31491

Polyethylene wear debris produced in a knee simulator model: Effect of crosslinking and counterface material

Paul A. Williams, Cindy M. Brown, Riichro Tsukamoto, Ian C. Clarke

Orthopedic Surgery

Research output: Contribution to journal › Article › peer-review

Abstract

Polyethylene (PE) debris has been well studied in clinical retrievals and laboratory wear simulations of total hip replacements. However, little is known about PE debris from total knee replacements. In this study, we investigated the effects of crosslinking PE bearings and alternate counterface material. Mildly (35 kGy) and highly (70 kGy) crosslinked PE were studied in combination with CoCr and zirconia femoral counterfaces. Wear debris was isolated and its morphology characterized. Except for changes in PE debris size with the zirconia bearings, there were no morphological changes greater than 10%. The average submicron volume fraction decreased from about 65% to 45% with both increased crosslinking and changing counterface material from CoCr to zirconia. The averaged number of generated particles decreased by ∼fourfold with increased crosslinking and threefold with changing counterface material from CoCr to zirconia. This showed that the degree of PE crosslinking and the choice of counterface material were important factors in the PE wear debris production in total knee simulator replacements.

Original language	English
Pages (from-to)	78-85
Number of pages	8
Journal	Journal of Biomedical Materials Research - Part B Applied Biomaterials
Volume	92
Issue number	1
DOIs	https://doi.org/10.1002/jbm.b.31491
State	Published - Jan 2010

ASJC Scopus Subject Areas

Biomaterials
Biomedical Engineering

Keywords

Ceramic
Crosslinking
Debris
Knee
Polyethylene

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10.1002/jbm.b.31491

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abstract = "Polyethylene (PE) debris has been well studied in clinical retrievals and laboratory wear simulations of total hip replacements. However, little is known about PE debris from total knee replacements. In this study, we investigated the effects of crosslinking PE bearings and alternate counterface material. Mildly (35 kGy) and highly (70 kGy) crosslinked PE were studied in combination with CoCr and zirconia femoral counterfaces. Wear debris was isolated and its morphology characterized. Except for changes in PE debris size with the zirconia bearings, there were no morphological changes greater than 10%. The average submicron volume fraction decreased from about 65% to 45% with both increased crosslinking and changing counterface material from CoCr to zirconia. The averaged number of generated particles decreased by ∼fourfold with increased crosslinking and threefold with changing counterface material from CoCr to zirconia. This showed that the degree of PE crosslinking and the choice of counterface material were important factors in the PE wear debris production in total knee simulator replacements.",

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N1 - First published: Get access to the full version of this article. View access options below. Log in with Open Athens, Shibboleth, or your institutional credentials. If you have previously obtained access with your personal account, Please log in. Polyethylene (PE) debris has been well studied in clinical retrievals and laboratory wear simulations of total hip replacements.

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Polyethylene wear debris produced in a knee simulator model: Effect of crosslinking and counterface material

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