Al-Hajjar, M orcid.org/0000-0001-5008-6138, Carbone, S, Jennings, LM orcid.org/0000-0003-1446-4511 et al. (4 more authors) (2017) Wear of composite ceramics in mixed-material combinations in total hip replacement under adverse edge loading conditions. Journal of Biomedical Materials Research Part B: Applied Biomaterials, 105 (6). pp. 1361-1368. ISSN 1552-4973
Abstract
Further development of ceramic materials for total hip replacement aim to increase fracture toughness and further reduce the incidence of bearing fracture. Edge loading due to translational mal positioning (microseparation) has replicated stripe wear, wear rates, and bimodal wear debris observed on retrievals. This method has replicated the fracture of early zirconia ceramic-on-ceramic bearings. This has shown the necessity of introducing microseparation conditions to the gait cycle when assessing the tribological performance of new hip replacement bearings. Two novel ceramic matrix composite materials, zirconia-toughened alumina (ZTA) and alumina-toughened zirconia (ATZ), were developed by Mathys Orthop€adie GmbH. In this study, ATZon- ATZ and ZTA-on-ZTA bearing combinations were tested and compared with alumina-on-alumina (Al2O3-on-Al2O3) bearings under adverse microseparation and edge loading conditions using the Leeds II physiological anatomical hip joint simulator. The wear rate (695% confidence limit) of ZTA-on-ZTA was 0.1460.10 mm3/million cycles and that of ATZ-on-ATZ was 0.0660.004 mm3/million cycles compared with a wear rate of 0.7461.73 mm3/million cycles for Al2O3- on-Al2O3 bearings. Stripe wear was evident on all bearing combinations; however, the stripe formed on the ATZ and ZTA femoral heads was thinner and shallower that that formed on the Al2O3 heads. Posttest phase composition measurements for both ATZ and ZTA materials showed no significant change in the monoclinic zirconia content. ATZon- ATZ and ZTA-on-ZTA showed superior wear resistance properties when compared with Al2O3-on-Al2O3 under adverse edge loading conditions. VC 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 00B: 000–000, 2013.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors; Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | ceramic on ceramic; hip replacement; stripe wear; microseparation; edge loading |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Funding Information: | Funder Grant number Wellcome Trust 088908/Z/09/Z Mathys Orthopadie GmbH PP054/01/07 |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Oct 2016 10:46 |
Last Modified: | 06 Sep 2017 15:57 |
Published Version: | http://dx.doi.org/10.1002/jbm.b.33671 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/jbm.b.33671 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:98495 |