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Amorphous carbon coatings for total knee replacements: part II : tribological behavior

Diamond-like carbon coatings may decrease implant wear, therefore, they are helping to reduce aseptic loosening and increase service life of total knee arthroplasties (TKAs). This two-part study addresses the development of such coatings for ultrahigh molecular weight polyethylene (UHMWPE) tibial in...

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Bibliographische Detailangaben
Hauptverfasser: Rothammer, Benedict (VerfasserIn) , Marian, Max (VerfasserIn) , Neusser, Kevin (VerfasserIn) , Bartz, Marcel (VerfasserIn) , Böhm, Thomas (VerfasserIn) , Krauß, Sebastian (VerfasserIn) , Schröder, Stefan (VerfasserIn) , Uhler, Maximilian (VerfasserIn) , Thiele, Simon (VerfasserIn) , Merle, Benoit (VerfasserIn) , Kretzer, Jan Philippe (VerfasserIn) , Wartzack, Sandro (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 5 June 2021
In: Polymers
Year: 2021, Jahrgang: 13, Heft: 11, Pages: 1-25
ISSN:2073-4360
DOI:10.3390/polym13111880
Online-Zugang:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.3390/polym13111880
Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2073-4360/13/11/1880
Volltext
Verfasserangaben:Benedict Rothammer, Max Marian, Kevin Neusser, Marcel Bartz, Thomas Böhm, Sebastian Krauß, Stefan Schroeder, Maximilian Uhler, Simon Thiele, Benoit Merle, Jan Philippe Kretzer and Sandro Wartzack
Beschreibung
Zusammenfassung:Diamond-like carbon coatings may decrease implant wear, therefore, they are helping to reduce aseptic loosening and increase service life of total knee arthroplasties (TKAs). This two-part study addresses the development of such coatings for ultrahigh molecular weight polyethylene (UHMWPE) tibial inlays as well as cobalt-chromium-molybdenum (CoCr) and titanium (Ti64) alloy femoral components. While the deposition of a pure (a-C:H) and tungsten-doped hydrogen-containing amorphous carbon coating (a-C:H:W) as well as the detailed characterization of mechanical and adhesion properties were the subject of Part I, the tribological behavior is studied in Part II. Pin-on-disk tests are performed under artificial synovial fluid lubrication. Numerical elastohydrodynamic lubrication modeling is used to show the representability of contact conditions for TKAs and to assess the influence of coatings on lubrication conditions. The wear behavior is characterized by means of light and laser scanning microscopy, Raman spectroscopy, scanning electron microscopy and particle analyses. Although the coating leads to an increase in friction due to the considerably higher roughness, especially the UHMWPE wear is significantly reduced up to a factor of 49% (CoCr) and 77% (Ti64). Thereby, the coating shows continuous wear and no sudden failure or spallation of larger wear particles. This demonstrated the great potential of amorphous carbon coatings for knee replacements.
Beschreibung:Gesehen am 15.09.2022
Beschreibung:Online Resource
ISSN:2073-4360
DOI:10.3390/polym13111880

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