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Microstructural effects on the wear resistance of CO-CR implant alloys
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2006 (English)In: Proceedings of the 8th Biennial Conference on Engineering Systems Design and Analysis, 2006, -951 p.Conference paper (Refereed)
Abstract [en]

Modem metal-on-metal articulation have been proposed to reduce the incidence of osteolysis due to polyethylene particles debris, as a late complication. The tribology of large metal-on-metal articulations allows theoretical advantages with respect to other configurations, especially for the lubrication regime. This study was aimed to compare the wear performances of different diameters of clinically available acetabular metallic components manufactured in a cast cobalt-chrome alloy. To evaluate the influence of the material properties of wear and microstructure, metal-on-metal components were tested in a hip joint simulator for five million cycles with bovine calf serum as lubricant. In particular, three different configurations of metal-on-metal components (28-mm, 36-mm, 54-mm) were tested. After the test all specimens were examined with optical and electronic scanning microscope. A statistical difference were observed among the three groups tested in the run-in and steady-state wear rates, favoring the larger femoral heads. The results of this study indicate that the 54-mm diameter femoral heads prove a better wear behavior than the smaller configurations.

Place, publisher, year, edition, pages
2006. -951 p.
, Proceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006, 2006
Keyword [en]
Bovine calf serum, Grain size, Hip simulator, Metallic hip prostheses, Microstructure, Acetabular metallic components, Cobalt-chrome alloy, Femoral heads, Metal articulation, Osteolysis, Debris, Grain size and shape, Lubrication, Polyethylenes, Scanning electron microscopy, Wear resistance, Cobalt alloys
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-155867ISI: 000249558200107ScopusID: 2-s2.0-33845737480ISBN: 0791837793ISBN: 9780791837795OAI: diva2:764036
8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006, 4 July 2006 through 7 July 2006, Torino

QC 20141118

Available from: 2014-11-18 Created: 2014-11-13 Last updated: 2014-11-18Bibliographically approved

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Jedenmalm, Anneli
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