Journal
BIOTECHNOLOGY LETTERS
Volume 34, Issue 12, Pages 2299-2305Publisher
SPRINGER
DOI: 10.1007/s10529-012-1040-2
Keywords
Antimicrobial activity; Coating; Infection prevention; Photocatalysis; Surgical implants; Titanium dioxide
Categories
Funding
- Swedish Science Council
- Carl Trygger Foundation
- Goran Gustafsson Foundation
- Swedish Foundation for Strategic Research
- Vinnova
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Nanostructured crystalline titanium dioxide coatings deposited by cathodic arc evaporated on titanium grade five medical implant substrates were demonstrated to exhibit UV-induced photocatalytic activity that can be utilized to provide bactericidal effects against Staphylococcus epidermidis. The photocatalytic activity of the coatings was confirmed via degradation of Rhodamine B under UV illumination. A 90 % reduction of viable bacteria was achieved in a clinically suitable time of only 2 min with a UV dose of 2.4 J delivered at 365 nm. These results are encouraging for the development of antimicrobial surfaces in orthopedics and dentistry in order to prevent or treat post-surgical infections. Purpose of work To assess the possibility of employing photocatalysis for elimination of S. epidermidis, known to cause medical device related infections, under short enough times to be clinically useful on an implant surface produced with a technique that is suitable for mass production.
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