title: Corrosion behavior of ion implanted nickel-titanium orthodontic wire in fluoride mouth rinse solutions.
abstract: This study investigated the corrosion properties of ion implanted nickel-titanium wire (Neo Sentalloy Ionguard) in artificial saliva and fluoride mouth rinse solutions (Butler F Mouthrinse, Ora-Bliss). Non ion implanted nickel-titanium wire (Neo Sentalloy) was used as control. The anodic corrosion behavior was examined by potentiodynamic polarization measurement. The surfaces of the specimens were examined with SEM. The elemental depth profiles were characterized by XPS. Neo Sentalloy Ionguard in artificial saliva and Butler F Mouthrinse (500 ppm) had a lower current density than Neo Sentalloy. In addition, breakdown potential of Neo Sentalloy Ionguard in Ora-Bliss (900 ppm) was much higher than that of Neo Sentalloy although both wires had similar corrosion potential in Ora-Bliss (450 and 900 ppm). The XPS results for Neo Sentalloy Ionguard suggested that the layers consisted of TiO(2) and TiN were present on the surface and the layers may improve the corrosion properties.
authors.affiliation: Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan. iijima@hoku-iryo-u.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Iijima
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Yuasa
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Endo
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muguruma
authors.forename: Hiroki
authors.initials: H
authors.lastname: Ohno
authors.forename: Itaru
authors.initials: I
authors.lastname: Mizoguchi
mesh_terms: D002327:Cariostatic Agents; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry; D055664:Electrochemical Techniques; D005459:Fluorides; D007477:Ions; D008422:Materials Testing; D009067:Mouthwashes / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D009584:Nitrogen; D009969:Orthodontic Wires; D056951:Photoelectron Spectroscopy; D011199:Potentiometry; D012464:Saliva, Artificial; D014025:Titanium / Q000737:chemistry
chemical_list: D002327:Cariostatic Agents; D003722:Dental Alloys; D007477:Ions; D009067:Mouthwashes; D012464:Saliva, Artificial; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium; D009584:Nitrogen; D005459:Fluorides