title: Investigation of the in vitro photocatalytic antibacterial activity of nanocrystalline TiO2 and coupled TiO2/Ag containing copolymer on the surface of medical grade titanium.
abstract: Antibacterial surfaces have been in the focus of research for years, driven by an unmet clinical need to manage an increasing incidence of implant-associated infections. The use of silver has become a topic of interest because of its proven broad-spectrum antibacterial activity and track record as a coating agent of soft tissue implants and catheters. However, for the time being, the translation of these technological achievements for the improvement of the antibacterial property of hard tissue titanium (Ti) implants remains unsolved. In our study, we focused on the investigation of the photocatalysis mediated antibacterial activity of silver (Ag), and Ti nanoparticles instead of their pharmacological effects. We found that the photosensitisation of commercially pure titanium discs by coating them with an acrylate-based copolymer that embeds coupled Ag/Ti nanoparticles can initiate the photocatalytic decomposition of adsorbed S. salivarius after the irradiation with an ordinary visible light source. The clinical isolate of S. salivarius was characterised with MALDI-TOF mass spectrometer, while the multiplication of the bacteria on the surface of the discs was followed-up by MTT assay. Concerning practical relevance, the infected implant surfaces can be made accessible and irradiated by dental curing units with LED and plasma arc light sources, our research suggests that photocatalytic copolymer coating films may offer a promising solution for the improvement of the antibacterial properties of dental implants.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Hungary gyorgyey.agnes@gmail.com.
authors.forename: Ágnes
authors.initials: Á
authors.lastname: Györgyey
authors.affiliation: Department of Physical Chemistry and Material Sciences, Faculty of Science and Informatics, University of Szeged, Hungary.
authors.forename: László
authors.initials: L
authors.lastname: Janovák
authors.affiliation: Department of Oral Biology and Experimental Dental Research, Faculty of Dentistry, University of Szeged, Hungary.
authors.forename: András
authors.initials: A
authors.lastname: Ádám
authors.affiliation: Department of Optics and Quantum Electronics, Faculty of Science and Informatics, University of Szeged, Hungary.
authors.forename: Judit
authors.initials: J
authors.lastname: Kopniczky
authors.affiliation: NanoTi Limited, Birmingham Research Park, UK.
authors.forename: Krisztián L
authors.initials: KL
authors.lastname: Tóth
authors.affiliation: Department of Physical Chemistry and Material Sciences, Faculty of Science and Informatics, University of Szeged, Hungary.
authors.forename: Ágota
authors.initials: Á
authors.lastname: Deák
authors.affiliation: Laboratoire Biosanté et Nanoscience, UFR Odontologie, University of Montpellier I, France.
authors.forename: Ivan
authors.initials: I
authors.lastname: Panayotov
authors.affiliation: Laboratoire Biosanté et Nanoscience, UFR Odontologie, University of Montpellier I, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Cuisinier
authors.affiliation: MTA-SZTE Supramolecular and Nanostructured Materials Research Group, Faculty of Medicine, University of Szeged, Hungary.
authors.forename: Imre
authors.initials: I
authors.lastname: Dékány
authors.affiliation: Department of Oral Biology and Experimental Dental Research, Faculty of Dentistry, University of Szeged, Hungary.
authors.forename: Kinga
authors.initials: K
authors.lastname: Turzó
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000737:chemistry; D002384:Catalysis; D002470:Cell Survival / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000008:administration & dosage* / Q000138:chemical synthesis; D015921:Dental Implants / Q000382:microbiology*; D008027:Light; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry / Q000648:ultrastructure; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D012834:Silver / Q000008:administration & dosage* / Q000737:chemistry; D000070001:Streptococcus salivarius / Q000187:drug effects* / Q000254:growth & development; D013499:Surface Properties / Q000528:radiation effects; D014025:Titanium / Q000008:administration & dosage / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D000900:Anti-Bacterial Agents; D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D011108:Polymers; C009495:titanium dioxide; D012834:Silver; D014025:Titanium
keywords: Titanium; antibacterial; dental implant; nanoparticle; photosensitisation; silver