Cobalt-chromium-molybdenum (CoCrMo) alloy, used for over five decades in orthopedic implants, may corrode and release wear debris into the body during use. These degradation products may stimulate immune and inflammatory responses in vivo. We report here on evidence of direct inflammatory cell-induced corrosion of human implanted and retrieved CoCrMo implant surfaces. Corrosion morphology on CoCrMo implant surfaces, in unique and characteristic patterns, and the presence of cellular remnants and biological materials intimately entwined with the corrosion indicates direct cellular attack under the cell membrane region of adhered and/or migrating inflammatory cells. Evidence supports a Fenton-like reaction mechanism driving corrosion in which reactive oxygen species are the major driver of corrosion. Using in vitro tests, large increases in corrosion susceptibility of CoCrMo were seen (40-100 fold) when immersed in phosphate buffered saline solutions modified with hydrogen peroxide and hydrochloric acid to represent the chemistry under inflammatory cells. This discovery raises significant new questions about the clinical consequences of such corrosion interactions, the role of patient inflammatory reactions, and the detailed mechanisms at play. (c) 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 103A: 211-223, 2015.
Direct in vivo inflammatory cell-induced corrosion of CoCrMo alloy orthopedic implant surfaces
Creators
Jeremy L. Gilbert - Syracuse University
Shiril Sivan - Syracuse University
Yangping Liu - Syracuse University
Sevi B. Kocagoez - Drexel Univ, Sch Biomed Engn Sci & Hlth Syst, Philadelphia, PA 19104 USA
Christina M. Arnholt - Drexel University
Steven M. Kurtz - Exponent (United States)
Publication Details
Journal of biomedical materials research. Part A, v 103(1)
Publisher
Wiley
Number of pages
13
Grant note
R01AR047904 / NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Arthritis & Musculoskeletal & Skin Diseases (NIAMS)
Depuy Synthes
R01 AR47904 / NIH (NIAMS); United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Arthritis & Musculoskeletal & Skin Diseases (NIAMS)
Resource Type
Journal article
Language
English
Academic Unit
School of Biomedical Engineering, Science, and Health Systems
Web of Science ID
WOS:000345572100024
Scopus ID
2-s2.0-84912570881
Other Identifier
991019167653204721
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