title: [Evaluation of the corrosion resistance of orthodontic wires by electrochemical measures and scanning electron microscopy (SEM)].
abstract: The objective of this paper is to study the corrosion resistance of orthodontic wires made of different alloys (stainless steel, chrome-cobalt, nickel-titanium and β-titanium) and for the same alloy from different vendors (GAC(®), RMO(®), 3M(®) and ORMCO(®)). Different electrochemical techniques (corrosion potential monitoring as a function of immersion time, current-potential curves, electrochemical impedance spectroscopy (EIS)) were used. The wires' resistance to corrosion was measured and compared with the surface condition, assessed by scanning electron microscopy (SEM). Using the recorded data, a rating system based on the corrosion resistance of orthodontic wires was developed. The comparison of these data with the results of SEM shows that the surface chemical composition plays a primary role in the electrochemical behavior of the orthodontic wires and, unlike surface defects, is a key parameter for the corrosion resistance of the alloy.
authors.affiliation: 62 bis, boulevard du Maréchal Joffre, 92340 Bourg-la-Reine, France.
authors.forename: André El
authors.initials: AE
authors.lastname: Zoghbi
authors.forename: Lorena
authors.initials: L
authors.lastname: Klein
authors.forename: Isabelle
authors.initials: I
authors.lastname: Frateur
mesh_terms: D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D009969:Orthodontic Wires; D013499:Surface Properties
chemical_list: D003722:Dental Alloys