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Massive failure of T i N b N coating in surface engineered metal‐on‐metal hip arthroplasty: Retrieval analysis
Author(s) -
Łapaj Łukasz,
Markuszewski Jacek,
Wendland Justyna,
Mróz Adrian,
WieruszKozłowska Małgorzata
Publication year - 2016
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33421
Subject(s) - materials science , coating , delamination (geology) , composite material , bearing (navigation) , substrate (aquarium) , metal , metallurgy , paleontology , oceanography , cartography , biology , geology , subduction , tectonics , geography
This article presents examination of a failed total hip replacement with surface engineered metal‐on‐metal (MoM) articulation. The implant was coated with a thin TiNbN film (Physical Vapor Deposition), and at retrieval 53 months after implantation the coating was abraded on weight‐bearing part of the head and acetabular component. Scanning electron microscopy of bearing surfaces demonstrated multifocal crack formation, delamination of small film fragments, and formation of aggregates containing nanometer sized wear debris. We also observed coating damage in third body mechanism. Complex failure mechanism of TiNbN coating demonstrated in this study suggests insufficient bonding strength between the coating and substrate alloy and raise concerns regarding the use of such coatings in total hip arthroplasty with MoM bearing. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1043–1049, 2016.