High wear resistance of femoral components coated with titanium nitride: a retrieval analysis

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
Christian FabryRainer Bader

Abstract

The objective of this study was to evaluate the in vivo wear resistance of cobalt-chromium femoral components coated with titanium nitride (TiN). Our null hypothesis was that the surface damage and the thickness of the TiN coating do not correlate with the time in vivo. Twenty-five TiN-coated bicondylar femoral retrievals with a mean implantation period of 30.7 ± 11.7 months were subjected to an objective surface damage analysis with a semi-quantitative assessment method. A visual examination of scratches, indentations, notches and coating breakthroughs of the surfaces was performed. The roughness and the coating thickness of the TiN coating were evaluated in the main articulation regions. Narrow scratches and indentations in the range of low flexion angles on the retrieval surfaces were the most common modes of damage. There was no evidence of delamination on the articulation surface but rather at the bottom of isolated severe indentations or notches. An analysis of three retrievals revealed a coating breakthrough in the patellofemoral joint region, resulting from patella maltracking and a dislocation. The arithmetical mean roughness of the TiN surface slightly increased with the implantation period. In contrast, the maximum p...Continue Reading

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Citations

Sep 1, 2019·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Łukasz Łapaj, Justyna Rozwalka
May 6, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Jan K G LouwerensRuud P van Hove
Oct 30, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Lorenzo BanciAndrea Baldini

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Methods Mentioned

BETA
delamination
total hip arthroplasty

Software Mentioned

SPSS Statistics
ProfCoat

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