Modern 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.
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ASME 8th Biennial Conference on Engineering Systems Design and Analysis
July 4–7, 2006
Torino, Italy
ISBN:
0-7918-4250-9
PROCEEDINGS PAPER
Microstructural Effects on the Wear Resistance of Co-Cr Implant Alloys
S. Affatato,
S. Affatato
Istituti Ortopedici Rizzoli, Bologna, Italy
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W. Leardini,
W. Leardini
Istituti Ortopedici Rizzoli, Bologna, Italy
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A. Jedenmalm,
A. Jedenmalm
Institute of Royal Technology, Stockholm, Sweden
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M. Zavalloni,
M. Zavalloni
Istituti Ortopedici Rizzoli, Bologna, Italy
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O. Ruggeri,
O. Ruggeri
Istituto di Metallurgia, Bologna, Italy
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F. Tarterini,
F. Tarterini
Istituto di Metallurgia, Bologna, Italy
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M. Viceconti
M. Viceconti
Istituti Ortopedici Rizzoli, Bologna, Italy
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S. Affatato
Istituti Ortopedici Rizzoli, Bologna, Italy
W. Leardini
Istituti Ortopedici Rizzoli, Bologna, Italy
A. Jedenmalm
Institute of Royal Technology, Stockholm, Sweden
M. Zavalloni
Istituti Ortopedici Rizzoli, Bologna, Italy
O. Ruggeri
Istituto di Metallurgia, Bologna, Italy
F. Tarterini
Istituto di Metallurgia, Bologna, Italy
M. Viceconti
Istituti Ortopedici Rizzoli, Bologna, Italy
Paper No:
ESDA2006-95510, pp. 943-951; 9 pages
Published Online:
September 5, 2008
Citation
Affatato, S, Leardini, W, Jedenmalm, A, Zavalloni, M, Ruggeri, O, Tarterini, F, & Viceconti, M. "Microstructural Effects on the Wear Resistance of Co-Cr Implant Alloys." Proceedings of the ASME 8th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Dynamic Systems and Controls, Symposium on Design and Analysis of Advanced Structures, and Tribology. Torino, Italy. July 4–7, 2006. pp. 943-951. ASME. https://doi.org/10.1115/ESDA2006-95510
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