Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes
The article assesses the strength and structural parameters of load-bearing layers of metal biobearings made of CoCrMo alloy. The research material consisted of unicompartmental knee joint endoprostheses used in the human body, removed due to excessive wear. No patient participated in the examinatio...
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| Format: | Article |
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MDPI AG
2020-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/12/2689 |
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| author | Arkadiusz Szarek Grzegorz Stradomski Justyna Łukomska-Szarek Dariusz Rydz Wojciech Wolański Kamil Joszko |
| author_facet | Arkadiusz Szarek Grzegorz Stradomski Justyna Łukomska-Szarek Dariusz Rydz Wojciech Wolański Kamil Joszko |
| author_sort | Arkadiusz Szarek |
| collection | DOAJ |
| description | The article assesses the strength and structural parameters of load-bearing layers of metal biobearings made of CoCrMo alloy. The research material consisted of unicompartmental knee joint endoprostheses used in the human body, removed due to excessive wear. No patient participated in the examinations. The endoprostheses used as research material underwent the liquidation procedures in the hospital, which has all necessary permissions and certifications to perform endoprosthetic procedures. Endoprostheses selected for the examinations had been used for 6 to 12 years at similar load conditions as declared by the patients, i.e., body weight of F = 835 N, declared activity expressed as the number of load cycles up to 100 thousand/year, and no artificial joint infections. To assess the homogeneity of the research material, the analysis of chemical composition using a Joel scanning electron microscope with EDS (Energy-dispersive X-ray spectroscopy) was made to exclude endoprostheses with various alloying additives. Microscopic examinations were performed using the Phenom XL microscope, while the wear surface was examined using a Keyence VHX-900F microscope. Several experimental tests were also carried out on load-bearing surfaces to assess changes in strength parameters of the base material after a known life cycle and load conditions. Material hardness using the Vickers method, yield point, critical value of stress intensity coefficient, and the coefficient of friction µ were evaluated. The examinations allowed for the systematization of wear in the knee and femoral components of unicompartmental hip endoprostheses. The statistical evaluation of the number and costs of hip joint replacement surgeries in Poland was also made. |
| first_indexed | 2024-03-10T19:13:33Z |
| format | Article |
| id | doaj.art-e81049af965242fe87c9d54dd594ba85 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:13:33Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e81049af965242fe87c9d54dd594ba852023-11-20T03:39:28ZengMDPI AGMaterials1996-19442020-06-011312268910.3390/ma13122689Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction NodesArkadiusz Szarek0Grzegorz Stradomski1Justyna Łukomska-Szarek2Dariusz Rydz3Wojciech Wolański4Kamil Joszko5Faculty of Mechanical Engineering and Computer Science, Department of Technology and Automation, Czestochowa University of Technology, 21 Armii Krajowej Av., 42-201 Czestochowa, PolandFaculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 19 Armii Krajowej Av., 42-201 Czestochowa, PolandFaculty of Management, Czestochowa University of Technology, 19 B Armii Krajowej Av., 42-201 Czestochowa, PolandFaculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 19 Armii Krajowej Av., 42-201 Czestochowa, PolandFaculty of Biomedical Engineering, Department of Biomechatronics, Silesian University of Technology, 40 Roosevelta Av., 41-800 Zabrze, PolandFaculty of Biomedical Engineering, Department of Biomechatronics, Silesian University of Technology, 40 Roosevelta Av., 41-800 Zabrze, PolandThe article assesses the strength and structural parameters of load-bearing layers of metal biobearings made of CoCrMo alloy. The research material consisted of unicompartmental knee joint endoprostheses used in the human body, removed due to excessive wear. No patient participated in the examinations. The endoprostheses used as research material underwent the liquidation procedures in the hospital, which has all necessary permissions and certifications to perform endoprosthetic procedures. Endoprostheses selected for the examinations had been used for 6 to 12 years at similar load conditions as declared by the patients, i.e., body weight of F = 835 N, declared activity expressed as the number of load cycles up to 100 thousand/year, and no artificial joint infections. To assess the homogeneity of the research material, the analysis of chemical composition using a Joel scanning electron microscope with EDS (Energy-dispersive X-ray spectroscopy) was made to exclude endoprostheses with various alloying additives. Microscopic examinations were performed using the Phenom XL microscope, while the wear surface was examined using a Keyence VHX-900F microscope. Several experimental tests were also carried out on load-bearing surfaces to assess changes in strength parameters of the base material after a known life cycle and load conditions. Material hardness using the Vickers method, yield point, critical value of stress intensity coefficient, and the coefficient of friction µ were evaluated. The examinations allowed for the systematization of wear in the knee and femoral components of unicompartmental hip endoprostheses. The statistical evaluation of the number and costs of hip joint replacement surgeries in Poland was also made.https://www.mdpi.com/1996-1944/13/12/2689endoprostheses CoCrMosurface wearmicrostructure |
| spellingShingle | Arkadiusz Szarek Grzegorz Stradomski Justyna Łukomska-Szarek Dariusz Rydz Wojciech Wolański Kamil Joszko Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes Materials endoprostheses CoCrMo surface wear microstructure |
| title | Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes |
| title_full | Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes |
| title_fullStr | Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes |
| title_full_unstemmed | Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes |
| title_short | Wear Morphology on the Surfaces of CoCrMo Unicompartmental Knee Joint Endoprostheses as Elements of Metal–Metal Friction Nodes |
| title_sort | wear morphology on the surfaces of cocrmo unicompartmental knee joint endoprostheses as elements of metal metal friction nodes |
| topic | endoprostheses CoCrMo surface wear microstructure |
| url | https://www.mdpi.com/1996-1944/13/12/2689 |
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