Effect of oral antiseptics on the corrosion stability of nickel‐titanium orthodontic alloys

Rinčić Mlinarić, Marijana; Kanižaj, Lidija; Žuljević, Damir; Katić, Višnja; Špalj, Stjepan; Otmačić Ćurković, Helena (2018) Effect of oral antiseptics on the corrosion stability of nickel‐titanium orthodontic alloys. Materials and Corrosion / Werkstoffe und Korrosion, 69 (4). pp. 510-518. ISSN 0947-5117

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Official URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/ma...

Abstract

The aim was to explore the influence of the interaction of oral antiseptics and various coatings on the corrosion behavior of nickel‐ titanium (NiTi) orthodontic alloys. NiTi archwires with uncoated, rhodium‐coated, and nitride‐coated surface were exposed to artificial saliva pH 4.8 at the temperature of 37 °C, and to saliva with the addition of three commercial oral antiseptics (Curaspet, Gengigel, and Listerine). Electrochemical impedance spectroscopy and cyclic polarization were performed. Released nickel and titanium ions after a period of 7 days were measured by inductively coupled optical emission spectroscopy. Results demonstrate that the rate and degree of corrosion mainly increase with the addition of antiseptics. Electrochemical impedance spectroscopy indicates the biggest corrosion resistance in Gengigel. Rhodium‐coated NiTi demonstrates higher corrosion rate in saliva and in all antiseptics than uncoated and nitride‐ coated NiTi. The highest tendency toward localized corrosion is seen in rhodium‐coated NiTi in all media, and least in nitride‐coated NiTi. The release of titanium ions mainly supports findings of general corrosion rate. These results indicate that both antiseptics and coating modify corrosion.

Item Type:

Article

Additional Information:

Hrvatska Zaklada za Znanost, Grant number: IP-2014-09-7500

Uncontrolled Keywords:

corrosion ; nickel ; titanium ; antiseptics

Subjects:

BIOMEDICINE AND HEALTHCARE > Dental Medicine

Divisions:

Division of Materials Chemistry

Projects: