Determination of corrosion rate of orthodontic wires based on nickel-titanium alloy in artificial saliva

Katić, Višnja and Ćurković, Lidija and Ujević Bošnjak, Magdalena and Špalj, Stjepan (2014) Determination of corrosion rate of orthodontic wires based on nickel-titanium alloy in artificial saliva. = Determination of corrosion rate of orthodontic wires based on nickel-titanium alloy in artificial saliva. Materialwissenschaft und Werkstofftechnik, 45 (2). pp. 99-105. ISSN 0933-5137. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q4 (2013). Točan broj autora: 4.

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Abstract

The goal of this study was to determine corrosion behavior of three orthodontic wires based on nickel-titanium alloy (NiTi) in artificial saliva at temperature of 37 °C as function of immersion time. Following orthodontic wires were used: uncoated (NiTi), rhodium coated (Rh NiTi) and nitrified (N NiTi) orthodontic wires. Corrosion of investigated orthodontic wires were monitored by measuring of Ni2+ and Ti4+ ions released in artificial saliva by inductively coupled plasma-optical emission spectroscopy (ICP-OES) after 3, 7, 14, 21 and 28 days of immersion. Obtained results indicate that corrosion reaction of the NiTi wires in artificial saliva follows the parabolic rate law. According to the obtained values of parabolic corrosion rate constants, corrosion susceptibility of orthodontic wires decreases in the following order: Rh NiTi wire (Kp = 2.48 μg2/cm 4 h) > NiTi wire (Kp = 1.6 × 10-3 μg2/cm4 h) > N NiTi wire (Kp = 6.0 × 10-4 μg2/cm4 h). These results indicate that in comparison with uncoated NiTi wire, rhodium coating significantly increases corrosion susceptibility, while nitrification effectively suppresses the release of Ni2+ and Ti4+ ions. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): corrosion rate; inductively coupled plasma-optical emission spectroscopy (ICP-OES); NiTi orthodontic wires
Subjects: NATURAL SCIENCES > Chemistry
TECHNICAL SCIENCE > Mechanical Engineering
BIOMEDICINE AND HEALTH > Dental medicine
Divisions: 1000 Department of Materials > 1010 Chair of Materials and Tribology
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Citations JCR: 2 (20.5.2015.)
Quartiles: Q4 (2013)
Citations SCOPUS: 1 (20.5.2015.)
Date Deposited: 20 May 2015 09:40
Last Modified: 20 May 2015 09:40
URI: http://repozitorij.fsb.hr/id/eprint/4316

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