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Wear at the taper-trunnion junction of contemporary ceramic-on-ceramic hips shown in a multistation hip simulator

Lookup NU author(s): Rohan Bhalekar, Dr Simon Smith, Professor Tom Joyce

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by John Wiley and Sons Inc., 2018.

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Abstract

© 2018 Wiley Periodicals, Inc. Ceramic-on-ceramic (CoC) total hip replacements (THR) have a substantially lower wear rate than metal-on-polyethylene (MoP) hips, as shown by hip simulator testing. However, the revision rates of CoC and MoP hips are comparable. To try and explain this discrepancy the wear, at both the bearing surfaces and taper-trunnion interface of 36 mm BIOLOXdelta CoC THRs, mounted on 12/14 titanium (Ti6Al4V) trunnions was investigated using a hip simulator (n = 3) and a dynamically loaded CoC sample in a separate test station. Wear was assessed gravimetrically and surface roughness measurements of the articulating and taper surfaces taken at regular intervals. Scanning electron microscopy, surface roughness, and gravimetric measurements of trunnions was performed. After 5 million cycles, the mean total wear from the ceramic articulating surfaces was 0.25 mm3 from the hip simulator test, and that from the titanium trunnions was 0.29 mm3. This metal wear may provide an explanation for adverse reaction to metal debris found in contemporary CoC hip joints. It is therefore vital to consider taper-trunnion wear in preclinical testing of artificial hip joints. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B, 2018.


Publication metadata

Author(s): Bhalekar RM, Smith SL, Joyce TJ

Publication type: Article

Publication status: Published

Journal: Journal of Biomedical Materials Research Part B: Applied Biomaterials

Year: 2018

Issue: ePub ahead of Print

Online publication date: 05/09/2018

Acceptance date: 21/07/2018

Date deposited: 28/09/2018

ISSN (print): 1552-4973

ISSN (electronic): 1552-4981

Publisher: John Wiley and Sons Inc.

URL: https://doi.org/10.1002/jbm.b.34213

DOI: 10.1002/jbm.b.34213


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