Nitriding the surface of nickel-titanium orthodontic wires improves corrosion stability (CROSBI ID 640680)
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Podaci o odgovornosti
Rinčić Mlinarić, Marijana ; Otmačić Ćurković, Helena ; Špalj, Stjepan
engleski
Nitriding the surface of nickel-titanium orthodontic wires improves corrosion stability
Aim was to evaluate the effect of nitriding the surface on the corrosion stability of nickel-titanium orthodontic wires. The properties of the nickel -titanium wire dimension 0.020x0.020“, uncoated and nitrided surface, was studied in artificial saliva and antiseptics based on hyaluronic acid (Gengigel) and chlorhexidine (CuraseptH ) pH 4.8 and 37±1°C. Corrosion stability is determined by electrochemical method of Tafel extrapolation (current density, corrosion potential, repassivation and brakedown potential). In the interaction with artificial saliva nitrided wire shows decreased current density and lower corrosion potential than the uncoated wire. Resistace to general corrosion is higher in nitrided than in uncoated wires. There is no pitting corrosion tendency for both wires in artificial saliva. Solution with Gengigel induced the least corrosin rate in uncoated wires and with Curasept the highest. Potential of repassivation and failure are the lowest in Gengigel, indicating a lower probability of pitting corrosion. The lowest corrosion rate and decreased resistance to localized corrosion were observed in Gengigel in nitrided wires. Slightly higher corrosion rate but no acceleration of localized corrosion were detected in Curasept. Nitriding the surface of wires increases resistance to corrosion. Gengigel is the optimal media for use with uncoated and Curasept with nitrided wire.
corrosion ; nickel ; titanium
Founding: Croatian Science Foundation (Immunological and regenerative implications of corrosion of dental materials in children and adolescents (IMUNODENT) No. IP-09-2014-7500) .
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Podaci o prilogu
2016.
objavljeno
Podaci o matičnoj publikaciji
47. Congresso internazionale di Societa Italiana di ortodonzia . abstracts
Podaci o skupu
Congresso internazionale di Societa Italiana di ortodonzia (47 ; 2016)
poster
13.10.2016-15.10.2016
Firenca, Italija