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

Katić, Višnja; Ćurković, Lidija; Bošnjak, Magdalena Ujević; Špalj, Stjepan

doi:10.1002/mawe.201400201

Cited by 16 publications

(17 citation statements)

References 20 publications

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“…Nitrogen ion implantation leads to surface composition changes from NiTi to TiN (titanium nitride), replacing known allergen nickel with inert nitrogen. Improvement of the corrosion resistance of NiTi wire with nitrified surface compared to the uncoated NiTi wire was confirmed in previous electrochemical researches performed in artificial saliva and fluoride mouth rinse solution 1,3,4) . Rhodium is a noble metal with white reflective appearance and excellent anti-corrosion properties 5) , but in the commercially available wires it was noted that this aesthetic feature diminishes fast within oral cavity 6,7) .…”

Section: Introductionsupporting

confidence: 70%

“…The degree of corrosion of the basic material under protective coating is determined by the quantity and size of the surface defects, as well as the coating thickness 33) . The release of the Ni 2+ and Ti 4+ ions should be attributed to the pores found in disrupted surface coating 2,3) , and the variability in ion release should be attributed to greater variations in surface coating thickness and homogeneity between the specimens. The TiN coating on NiTi wire is resistant to corrosion in the low HF concentration agent, but repeated administration of the remineralizing agents with high HF causes deterioration of the wire's corrosion resistance, even if the contact between the wire and the remineralizing agent lasts only five min a week.…”

Section: Discussionmentioning

confidence: 99%

“…These prophylactic agents are usually applied once a week on teeth, as recommended by manufacturers. Testing media were heated in a water bath at 37°C, and their pH value was recorded with the pH meter MP 220 (Mettler Toledo, Greifensee, Artificial saliva solution was prepared from 1.5 g/L KCl, 1.5 g/L NaHCO 3, 0.5 g/L NaH2PO4-H2O, 0.5 g/L KSCN, 0.9 g/L lactic acid, pH value 4.8, as used in previous research 3,4,26,27) . The artificial saliva with the pH of 4.8 was used as imitation of more aggressive environment, which can be found in persons susceptible to caries; in such cases the prescription of adjuvant prophylactic agents would be recommended 15,28,29) .…”

Section: Methodsmentioning

confidence: 99%

“…Previously published results from wires' immersion to the artificial saliva alone were used for comparison 3) . 2+ and Ti 4+ ions The release of Ni 2+ and Ti 4+ ions from the three wire types combined with various remineralizing agents is shown in columns (for measured time intervals), and as lines (total amount) over time in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Rhodium is a noble metal with white reflective appearance and excellent anti-corrosion properties 5) , but in the commercially available wires it was noted that this aesthetic feature diminishes fast within oral cavity 6,7) . Also, it was found that this surface coating was uneven and non-homogeneous, which caused susceptibility to corrosion in artificial saliva, due to formation of galvanic coupling of underlying NiTi to noble metals in the surface coating [2][3][4] . There are no data available regarding the interaction between the rhodium coating and fluoride solutions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of pH, fluoride and hydrofluoric acid concentration on ion release from NiTi wires with various coatings

Katić

Ćurković

Bošnjak³

et al. 2017

Dent. Mater. J.

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Aim was to determine effect of pH, fluoride (F − ) and hydrofluoric acid concentration (HF) on dynamic of nickel (Ni 2+ ) and titanium (Ti 4+ ) ions release. Nickel-titanium wires with untreated surface (NiTi), rhodium (RhNiTi) and nitride (NNiTi) coating were immersed once a week for five min in remineralizing agents, followed by immersion to artificial saliva. Ion release was recorded after 3, 7, 14, 21 and 28 days. Pearson correlations and linear regression were used for statistical analysis. Release of Ni 2+ from NiTi and NNiTi wires correlated highly linearly positively with HF (r=0.948 and 0.940, respectively); for RhNiTi the correlation was lower and negative (r=−0.605; p<0.05). The prediction of Ti 4+ release was significant for NiTi (r=0.797) and NNiTi (r=0.788; p<0.05) wire. Association with F − was lower; for pH it was not significant. HF predicts the release of ions from the NiTi wires better than the pH and F − of the prophylactic agents.

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Section: Introductionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of pH, fluoride and hydrofluoric acid concentration on ion release from NiTi wires with various coatings

Katić

Ćurković

Bošnjak³

et al. 2017

Dent. Mater. J.

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

Mlinarić

Kanižaj

Žuljević

et al. 2017

Materials & Corrosion

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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.

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Oral antiseptics and nickel–titanium alloys: mechanical and chemical effects of interaction

et al. 2018

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The effect of oral antiseptics on the corrosion of nickel-titanium (NiTi) alloys with various coating was investigated. Uncoated, titanium nitride-coated and rhodium-coated NiTi archwires (0.020 × 0.020″) were tested in interaction with artificial saliva pH 4.8 and oral antiseptics based on hyaluronic acid (Gengigel), chlorhexidine (Curasept) and essential oils in alcohol base (Listerine). The dynamics of nickel and titanium ions release were recorded during 28 days. Springback ratio and modulus of resilience were assessed by three-point bending test. The results showed that corrosion of NiTi is related to type of antiseptic mouth rinse and coating formulations. Exposure to an artificial saliva and antiseptics tend to reduce flexibility and resilience of NiTi archwires. The influence of the media is more significant than the influence of the type of the alloys coating. The largest release of nickel ions is in the first 3 days. Antiseptics do not cause further deterioration of the elastic properties in uncoated NiTi compared to saliva. As a result of exposure of nitrified NiTi wires in Listerine, there is bigger release of nickel ions, decrease in elastic properties and lower force delivery in unload. Listerine tends to reduce elastic properties of rhodium-coated wires also. In conclusion, except for Listerine, changes of mechanical characteristics induced by antiseptics are small and would not have a clinically important impact. Generally, Curasept would be the most suitable option.

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

Cited by 16 publications

References 20 publications

Effect of pH, fluoride and hydrofluoric acid concentration on ion release from NiTi wires with various coatings

Effect of pH, fluoride and hydrofluoric acid concentration on ion release from NiTi wires with various coatings

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

Oral antiseptics and nickel–titanium alloys: mechanical and chemical effects of interaction

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