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Ability of a wash regimen to remove biofilm from the exposed surface of materials used in osseointegrated implants
Author(s) -
Allyn Gina,
Bloebaum Roy D.,
Epperson Richard T.,
Nielsen Mattias B.,
Dodd Kevin A.,
Williams Dustin L.
Publication year - 2019
Publication title -
journal of orthopaedic research®
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.24161
Subject(s) - biofilm , osseointegration , burnishing (metal) , implant , adhesion , nanotopography , dentistry , materials science , bacteria , chemistry , biomedical engineering , microbiology and biotechnology , medicine , metallurgy , composite material , surgery , biology , nanotechnology , polishing , genetics
The skin/implant interface of osseointegrated (OI) implants is susceptible to infection, causing excess pain, increased morbidity, and possibly implant removal. Novel distal femoral OI implants with binary nitride coatings have been developed with little physiological modeling to collect microbiological evidence of resistance to bacterial attachment. This in vitro study evaluated a Ti‐6Al‐4V alloy coated with TiNbN and treated with low plasticity burnishing (LPB) to assess attachment and biofilm formation of methicillin‐resistant Staphylococcus aureus (MRSA) under physiologically modeling conditions compared to standard Ti‐6Al‐4V alloy materials with a polished (“Color Buff”) or non‐polished finish (“Satin Finish”). Washability of the materials were also assessed and compared. It was hypothesized that the TiNbN/LPB treatments would resist bacterial adhesion and biofilm formation to a greater degree than the other two materials, and have a higher degree of bacterial removal following a clinically relevant wash regimen. Material types were exposed to a constant flow of broth containing MRSA and were analyzed using bacterial quantification, surface coverage analysis, and SEM imaging. Quantification data showed no difference in bacterial attachment among the varying material types both with and without the wash regimen. Surface coverage and SEM analysis confirmed results. The wash regimen led to an approximately 3 log 10 reduction in bacteria for all material types. Though the results did not support the hypothesis that a TiNbN coating/LPB treatment might resist bacterial attachment/biofilm formation more than other alloys, or have less bacteria after cleaning, results did support the potential importance of a daily wound‐hygiene regimen at the skin/implant interface of OI materials. Published 2018. This article is a U.S. Government work and is in the public domain in the USA.