Amorphous Carbon Coatings for Total Knee Replacements—Part II: Tribological Behavior

Rothammer B, Marian M, Neusser K, Bartz M, Böhm T, Krauß S, Schroeder S, Uhler M, Thiele S, Merle B, Kretzer JP, Wartzack S (2021)

Publication Language: English

Publication Type: Journal article, Online publication

Publication year: 2021

Journal

Polymers MDPI

Book Volume: 13

Pages Range: 1 - 25

Journal Issue: 11

URI: https://www.archiv.mfk.tf.fau.de?file=pubmfk_60bb59ba4432e

DOI: 10.3390/polym13111880

Open Access Link: https://www.mdpi.com/2073-4360/13/11/1880

Abstract

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.

Authors with CRIS profile

Benedict Rothammer Chair of Engineering Design (KTmfk) Max Marian Chair of Engineering Design (KTmfk) Kevin Neusser Chair of Engineering Design (KTmfk) Marcel Bartz Chair of Engineering Design (KTmfk) Sebastian Krauß Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Simon Thiele
Benoit Merle Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Sandro Wartzack Chair of Engineering Design (KTmfk)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Universitätsklinikum Heidelberg DE Germany (DE) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Rothammer, B., Marian, M., Neusser, K., Bartz, M., Böhm, T., Krauß, S.,... Wartzack, S. (2021). Amorphous Carbon Coatings for Total Knee Replacements—Part II: Tribological Behavior. Polymers, 13(11), 1 - 25. https://doi.org/10.3390/polym13111880

MLA:

Rothammer, Benedict, et al. "Amorphous Carbon Coatings for Total Knee Replacements—Part II: Tribological Behavior." Polymers 13.11 (2021): 1 - 25.

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