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

Mlinarić, Marijana Rinčić; Kanižaj, Lidija; Žuljević, Damir; Katić, Višnja; Špalj, Stjepan; Ćurković, Helena Otmačić

doi:10.1002/maco.201709797

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…[6]. Therefore, many research types were performed to understand better the corrosion behavior of titanium and its alloys in different simulated body fluids [7][8][9][10][11][12][13][14]. The high corrosion resistance of titanium and its alloys is due to the formation of stable and protective oxide layer (mainly consisting of TiO 2 ) of a thickness of 2-6 nm.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

et al. 2021

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The electrochemical behavior of commercially pure titanium (CP Ti) and Ti-6Al-4V (Grade 5) alloy in phosphate buffered saline solution (PBS, pH = 7.4) at 37 °C (i.e., in simulated physiological solution in the human body) was examined using open circuit potential measurements, linear and potentiodynamic polarization and electrochemical impedance spectroscopy methods. After the impedance measurements and after potentiodynamic polarizationmeasurements, the surface of the samples was investigated by scanning electron microscopy, while the elemental composition of oxide film on the surface of each sample was determined by EDS analysis. The electrochemical and corrosion behavior of CP Ti and Ti-6Al-4V alloys is due to forming a two-layer model of surface oxide film, consisting of a thin barrier-type inner layer and a porous outer layer. The inner barrier layer mainly prevents corrosion of CP Ti and Ti-6Al-4V alloy, whose thickness and resistance increase sharply in the first few days of exposure to PBS solution. With longer exposure times to the PBS solution, the structure of the barrier layer subsequently settles, and its resistance increases further. Compared to Ti-6Al-4V alloy, CP Ti shows greater corrosion stability.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

et al. 2021

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“…Previous studies on dental archwires are divided into four distinctive areas of research: (i) corrosion of dental archwires [8][9][10]; (ii) biocompatibility and nickel release from NiTi alloys [11][12][13][14][15]; (iii) versatile surface treatments to tailor properties, such as oxidation procedures [9,16]; and (iv) 2 of 11 different coatings on dental archwires that lower surface roughness and coefficient of friction [17]. Furthermore, coatings on NiTi include physical or chemical vapour deposition, ion implantation and thermal treatments leading to deterioration of NiTi properties, causing the diffusion of NiO into the TiO 2 phase [18].…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosive Study of New and In Vivo Exposed Nickel Titanium and Stainless Steel Orthodontic Archwires

et al. 2020

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The surface, corrosion and wear properties of new and in vivo exposed nickel titanium (NiTi) and stainless steel (SS) archwires used in orthodontic treatment were investigated. Electrochemical and tribo-electrochemical tests in artificial saliva were performed in order to define corrosion properties and to estimate wear rate of new and in vivo exposed NiTi and SS archwires. The surface chemical analysis of the passive film on the NiTi and SS archwires before and after tribocorrosion tests was performed by Auger Electron Spectroscopy (AES). In vivo exposed NiTi and SS archwires had better electrochemical properties than new archwires due to the protective nature of oral deposits. Total wear and coefficients of friction were higher among in vivo exposed archwires and higher in NiTi archwires in comparison to SS archwires. The estimated thickness of the TiO2 passive film on as-received NiTi is 8 nm, while the passive Cr2O3 film on as-received SS is just 1–2 nm. On in vivo exposed NiTi archwire, a 60–80 nm thick organic film/dental plaque was observed, and on SS, it was thinner, at about 60 nm. This research shows the importance of combining AES with electrochemical testing, to characterize tribocorrosive properties of NiTi and SS orthodontic archwires.

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Changes in mechanical properties of dental alloys induced by saliva and oral probiotic supplements

Trolić

Turco

Contardo

et al. 2020

Materialwissenschaft Werkst

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The effects of the saliva and oral probiotic supplements on roughness, friction and microhardness of the stainless steel (SS) and nickel‐titanium (NiTi) alloys used in dentistry was studied. The specimens of stainless steel, uncoated, rhodium‐coated and nitrided NiTi were exposed to artificial saliva with pH 4.8 and artificial saliva with addition of probiotic supplements containing bacteria Lactobacillus reuteri Prodentis through 28 days. First 5 days specimens were subjected to thermocycling to simulate intraoral conditions, 2500 cycles from 5 °C to 50 °C and the following days to the temperature of the 37±2 °C. Analyses demonstrated that oral probiotic supplements do not influence microhardness, roughness or friction of stainless steel above the influence of saliva. Probiotics increase roughness in NiTi, but without significant influence on friction, while microhardness in NiTi is not influenced. Surface nitriding reduces the influence of probiotics on roughness while rhodium coating increases it.

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

Cited by 9 publications

References 31 publications

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

Tribocorrosive Study of New and In Vivo Exposed Nickel Titanium and Stainless Steel Orthodontic Archwires

Changes in mechanical properties of dental alloys induced by saliva and oral probiotic supplements

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