Oxidation and other property changes of a remelted highly crosslinked UHMWPE in retrieved tibial bearings

Steven D. Reinitz; Barbara H. Currier; Rayna A.C. Levine; John P. Collier; Douglas W. Van Citters

doi:10.1002/jbm.b.33533

Oxidation and other property changes of a remelted highly crosslinked UHMWPE in retrieved tibial bearings

Steven D. Reinitz, Barbara H. Currier, Rayna A.C. Levine, John P. Collier, Douglas W. Van Citters

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7 Scopus citations

Abstract

This study examined retrieved UHMWPE tibial bearings made from a remelted highly crosslinked (HXL) UHMWPE to determine whether the material is chemically stable in vivo. Retrieved tibial components were measured for changes in ketone oxidation and crosslink density. Oxidation increased with in vivo duration, and a significant decrease in crosslink density with increased mean ketone oxidation index was observed. These results suggest that in vivo oxidation is causing material degradation. Furthermore, a subsurface whitened damage region was found below the articular surface of one bearing, indicating the possibility of a clinically relevant decrease in mechanical properties of this component.

Original language	English (US)
Pages (from-to)	39-45
Number of pages	7
Journal	Journal of Biomedical Materials Research - Part B Applied Biomaterials
Volume	105
Issue number	1
DOIs	https://doi.org/10.1002/jbm.b.33533
State	Published - Jan 1 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Wiley Periodicals, Inc.

Keywords

FTIR
arthroplasty
oxidation
polyethylene (UHMWPE)

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10.1002/jbm.b.33533

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abstract = "This study examined retrieved UHMWPE tibial bearings made from a remelted highly crosslinked (HXL) UHMWPE to determine whether the material is chemically stable in vivo. Retrieved tibial components were measured for changes in ketone oxidation and crosslink density. Oxidation increased with in vivo duration, and a significant decrease in crosslink density with increased mean ketone oxidation index was observed. These results suggest that in vivo oxidation is causing material degradation. Furthermore, a subsurface whitened damage region was found below the articular surface of one bearing, indicating the possibility of a clinically relevant decrease in mechanical properties of this component.",

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AU - Reinitz, Steven D.

AU - Currier, Barbara H.

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AU - Collier, John P.

AU - Van Citters, Douglas W.

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AB - This study examined retrieved UHMWPE tibial bearings made from a remelted highly crosslinked (HXL) UHMWPE to determine whether the material is chemically stable in vivo. Retrieved tibial components were measured for changes in ketone oxidation and crosslink density. Oxidation increased with in vivo duration, and a significant decrease in crosslink density with increased mean ketone oxidation index was observed. These results suggest that in vivo oxidation is causing material degradation. Furthermore, a subsurface whitened damage region was found below the articular surface of one bearing, indicating the possibility of a clinically relevant decrease in mechanical properties of this component.

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KW - oxidation

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Oxidation and other property changes of a remelted highly crosslinked UHMWPE in retrieved tibial bearings

Abstract

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