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

Katić, Višnja; Ćurković, Lidija; Bošnjak, Magdalena Ujević; Peroš, Kristina; Mandic, Davor; Špalj, Stjepan

doi:10.4012/dmj.2016-169

Cited by 19 publications

(18 citation statements)

References 38 publications

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“…Metal ceramic materials have been increasingly replaced by metal-free materials as the release of metal ions has been widely discussed. Various metal ions including silver [ 14 ], gold [ 15 ], titanium [ 16 ], and nickel [ 17 ] of dental prosthesis could be released into the saliva and plasma. McGinley et al even reported that diffused Ni ions from a dental Ni-Cr alloy could spread throughout the epithelial tissue to the basal lamina and subsequently throughout the extracellular matrix, resulting in a loss of cell viability and tissue integrity [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

The Biocompatibility of Dental Graded Nano-Glass-Zirconia Material After Aging

Sun

Liu

et al. 2018

Nanoscale Res Lett

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ᅟA graded nano-glass/zirconia (G/Z) system has been developed via the infiltration of nano-glass into a nano-zirconia surface, which is advantageous for robust core-veneer bonds. The aging issue is a key for yttrium-stabilized tetragonal zirconia polycrystals (Y-TZPs), and therefore, it is necessary to evaluate the influence of aging degradation on the biocompatibility of G/Z systems before their possible clinical application. Herein, such biocompatibility testing was performed with human gingival fibroblasts (HGFs) seeded onto unaged/aged G/Z and Y-TZP for 2–72 h. Assessments included an oral mucous membrane irritation test in conjunction with analyses of cell viability, cell adhesion, and oxidative stress responses. Significant metabolic decreases in aged G/Z- and Y-TZP-treated cells were observed at 72 h. G/Z did not elicit any significant differences in cell viability compared with Y-TZP over 72 h both before and after aging. The oxidative stress data for the aged G/Z- and Y-TZP-treated cells showed a significant increase at 72 h. The G/Z specimens did not elicit any significant differences in ROS production compared with Y-TZP over 72 h both before and after aging. The cell adhesion rates of both G/Z and Y-TZP increased significantly after aging. The cell adhesion rates of G/Z and Y-TZP were not significantly different before and after aging. According to the oral mucous membrane irritation test, scores for macroscopic and microscopic observations for both the aged G/Z and unaged G/Z sides were 0, demonstrating no consequent irritation.ConclusionsThe excellent biocompatibility of G/Z indicates that it has potential for future clinical applications.

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Section: Discussionmentioning

confidence: 99%

The Biocompatibility of Dental Graded Nano-Glass-Zirconia Material After Aging

Sun

Liu

et al. 2018

Nanoscale Res Lett

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“…Repeated application of oral antiseptics and fluorides induces dissolving and breakage of protective oxide film of the surface and induce additional corrosion, which is confirmed in electrochemical analyses and measurement of dynamic of ions release [28,29]. Corrosion appears to be mostly influenced by hy-drofluoric acid that is a product of fluorides concentration and pH [30].…”

Section: Roughnessmentioning

confidence: 93%

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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“…Measurement of pH in antiseptics was conducted at temperature 37 °C by using pH‐meter MP 220 (Mettler Toledo Int., Greifensee, Switzerland). For the calculation of hydrofluoric acid (HF) concentrations in antiseptics, pH information and fluoride concentration information was used according to formula (1):

[H F] = \frac{true[F^{-} true]}{10^{p H - p K a}},

where [F − ] is the fluoride concentration and pKa is the constant of dissociation of hydrofluoric acid 3.17 …”

Section: Methodsmentioning

confidence: 99%

“…All the samples were made in triplicate. Released nickel (Ni 2+ ) and titanium (Ti 4+ ) ions were measured by inductively coupled optical emission spectroscopy (ICP‐OES) on the Thermo Elemental IRIS Intrepid II xsp Duo device (Thermo Electron Corporation, Austin, USA) according to the parameters described in previous works . Ion stabilization before the measurement was achieved by adding one drop of ultra‐pure nitric acid.…”

Section: Methodsmentioning

confidence: 99%

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

Cited by 19 publications

References 38 publications

The Biocompatibility of Dental Graded Nano-Glass-Zirconia Material After Aging

The Biocompatibility of Dental Graded Nano-Glass-Zirconia Material After Aging

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

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

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