title: Plasma-based fluorine ion implantation into dental materials for inhibition of bacterial adhesion.
abstract: The aims of this study were to evaluate the fluorine depth profiles of pure titanium (Ti), stainless steel (SUS), and polymethyl methacrylate (PMMA) modified by plasma-based fluorine ion implantation and the effects of fluorine ion implantation on contact angle, fluoride ion release, and S. mutans adhesion. Fluorine-based gases used were Ar+F2 and CF4. By means of SIMS, it was found that the peak count of PMMA was the lowest while that of Ti was the highest. Then, up to one minute after Ar sputtering, the presence of fluorine and chromic fluoride could be detected by XPS in the surface and subsurface layer. As for the effects of using CF4 gas for fluorine ion implantation into SUS substrate, the results were: contact angle was significantly increased; no fluoride ion release was detected; antibacterial activity was significantly increased while initial adhesion was decreased. These findings thus indicated that plasma-based fluorine ion implantation into SUS with CF4 gas provided surface antibacterial activity which was useful in inhibiting bacterial adhesion.
authors.affiliation: Department of Pediatric Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto, Tokushima 770-8504, Japan.
authors.lastname: Nurhaerani
authors.forename: Kenji
authors.initials: K
authors.lastname: Arita
authors.forename: Yukari
authors.initials: Y
authors.lastname: Shinonaga
authors.forename: Mizuho
authors.initials: M
authors.lastname: Nishino
mesh_terms: D001128:Argon / Q000737:chemistry; D001422:Bacterial Adhesion / Q000187:drug effects*; D003764:Dental Materials / Q000737:chemistry*; D005459:Fluorides / Q000032:analysis; D005461:Fluorine / Q000737:chemistry*; D005466:Fluorocarbons / Q000737:chemistry; D007477:Ions; D013058:Mass Spectrometry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D018629:Spectrometry, Mass, Secondary Ion; D013052:Spectrometry, X-Ray Emission; D013193:Stainless Steel / Q000737:chemistry; D013295:Streptococcus mutans / Q000187:drug effects; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D017155:Wettability
chemical_list: D003764:Dental Materials; D005466:Fluorocarbons; D007477:Ions; D013193:Stainless Steel; D005461:Fluorine; D001128:Argon; C035066:carbon tetrafluoride; D019904:Polymethyl Methacrylate; D014025:Titanium; D005459:Fluorides