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Microstructural eff...
Microstructural effects on the wear resistance of CO-CR implant alloys
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Affatato, S. (författare)
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Leardini, W. (författare)
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- Jedenmalm, Anneli (författare)
- KTH,Materialvetenskap
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Zavalloni, M. (författare)
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Ruggeri, O. (författare)
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Tarterini, F. (författare)
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Viceconti, M. (författare)
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(creator_code:org_t)
- 2008-09-05
- 2006
- Engelska.
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Ingår i: Proceedings of the 8th Biennial Conference on Engineering Systems Design and Analysis. - : ASMEDC. - 0791837793 - 9780791837795 ; , s. -951
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- 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
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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