Metal ion levels: how can they help us?

Metal ion levels: how can they help us?

The Journal of arthroplasty (2014-03-25)

William L Griffin

ABSTRACT

Ion levels have been shown to reliably predict abnormal function of the bearing surface with increased wear, but ion levels should not be used alone as a trigger for when to proceed with revision surgery with metal-metal articulations. Risk stratification strategies help determine which patients should be monitored more closely with serial ion levels, cross-sectional imaging with a MARS MRI, or proceed on to revision. Based on the current data available, an ion level greater than 4.5 ppb (Cr or Co) may serve as a threshold for when abnormal wear is occurring, and is suggested as a trigger for a MARS MRI scan.

MATERIALS

Product Number

Brand

Product Description

266264

Sigma-Aldrich

Chromium, powder, 99.5%, −100 mesh

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356867

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266647

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266299

Sigma-Aldrich

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