title: Electrochemical impedance spectroscopy investigation on the clinical lifetime of ProTaper rotary file system.
abstract: The main objective of the current paper is to show that electrochemical impedance spectroscopy (EIS) could be a method for evaluating and predicting of ProTaper rotary file system clinical lifespan. This particular aspect of everyday use of the endodontic files is of great importance in each dental practice and has profound clinical implications. The method used for quantification resides in the electrochemical impedance spectroscopy theory and has in its main focus the characteristics of the surface titanium oxide layer. This electrochemical technique has been adapted successfully to identify the quality of the Ni-Ti files oxide layer. The modification of this protective layer induces changes in corrosion behavior of the alloy modifying the impedance value of the file. In order to assess the method, 14 ProTaper sets utilized on different patients in a dental clinic have been submitted for testing using EIS. The information obtained in regard to the surface oxide layer has offered an indication of use and proves that the said layer evolves with each clinical application. The novelty of this research is related to an electrochemical technique successfully adapted for Ni-Ti file investigation and correlation with surface and clinical aspects.
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Polytechnic University of Bucharest, Polizu 1-7, 011061 Bucharest, Romania.
authors.forename: Virgil
authors.identifier: 0000-0002-2060-1693
authors.initials: V
authors.lastname: Penta
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Polytechnic University of Bucharest, Polizu 1-7, 011061 Bucharest, Romania.
authors.forename: Cristian
authors.initials: C
authors.lastname: Pirvu
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Polytechnic University of Bucharest, Polizu 1-7, 011061 Bucharest, Romania.
authors.forename: Ioana
authors.initials: I
authors.lastname: Demetrescu
mesh_terms: D003343:Corrosion; D058266:Dielectric Spectroscopy; D004708:Endodontics / Q000379:methods; D006801:Humans; D009532:Nickel / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D009532:Nickel; C028007:nickel monoxide; D014025:Titanium