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Influence of surface layer on mechanical and corrosion properties of nickel-titanium orthodontic wires (CROSBI ID 207151)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Katić, Višnja ; Otmačić Ćurković, Helena ; Semenski, Damir ; Baršić, Gorana ; Marušić, Katarina ; Špalj, Stjepan Influence of surface layer on mechanical and corrosion properties of nickel-titanium orthodontic wires // Angle orthodontist, 84 (2014), 6; 1041-1048. doi: 10.2319/090413-651.1

Podaci o odgovornosti

Katić, Višnja ; Otmačić Ćurković, Helena ; Semenski, Damir ; Baršić, Gorana ; Marušić, Katarina ; Špalj, Stjepan

engleski

Influence of surface layer on mechanical and corrosion properties of nickel-titanium orthodontic wires

Objective: To analyze the effect of various coating formulations on the mechanical and corrosion properties of nickel-titanium (NiTi) orthodontic wires. Materials and Methods: Uncoated, rhodium-coated, and nitrified NiTi wires were observed with a three-point-bend test, surface roughness (Ra) measurement, scanning electron microscopy, energy dispersive spectroscopy, and electrochemical testing (open circuit potential, electrochemical impedance spectroscopy, and cyclic polarization scan). Differences in the properties of tested wire types were analyzed with analysis of variance and Tukey post hoc test. Results: Uncoated and nitrified NiTi wires showed similar mechanical and anticorrosive properties, while rhodium- coated NiTi wires showed the highest Ra and significantly higher modulus of elasticity, yield strength, and delivery of forces during loading but not in unloading. Rhodium-coated NiTi wires also had the highest corrosion current density and corrosion potential, lowest impedance modulus, and two time constants on Bode plot, one related to the Rh/Au coating and the other to underlying NiTi. Conclusion: Working properties of NiTi wires were unaffected by various coatings in unloading. Nitrification improved corrosion resistance. Rhodium coating reduced corrosion resistance and pronounced susceptibility to pitting corrosion in artificial saliva because of galvanic coupling between the noble coating and the base alloy.

NiTi ; surface coating ; Three-point-bend test ; corrosion ; electrochemical testing

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

84 (6)

2014.

1041-1048

objavljeno

0003-3219

1945-7103

10.2319/090413-651.1

Povezanost rada

Dentalna medicina, Kemija, Kemijsko inženjerstvo, Strojarstvo

Poveznice
Indeksiranost