Ion release from NiTi orthodontic wires in artificial saliva with various acidities

Huang, Her Hsiung; Chiu, Yu Hui; Lee, Tzu Hsin; Wu, Shun-Cheng; Yang, Hui; Su, Kuo Hsiung; Hsu, Chii Chih

doi:10.1016/s0142-9612(03)00188-1

Cited by 265 publications

(214 citation statements)

References 20 publications

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“…16 However, in this study, the Ormco archwire (with the notable surface defects and highest surface roughness shown in Figure 1 and Table 1) did not exhibit a lower R p value or a lower corrosion resistance, regardless of the NaF concentration in artificial saliva (Table 2). This was similar to the results reported by the previous studies, which showed that a NiTi archwire with a rougher surface does not exhibit greater metal ion release 17 or lower corrosion resistance 13 in fluoride-free acidic artificial saliva. In this study, the difference in R p among the four types of NiTi archwires with the same surface passive film was believed to be related to the varying surface residual stress produced during the different manufacturing procedures rather than to the notable surface defects and/or surface roughness.…”

Section: Discussionsupporting

confidence: 92%

Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva

Lee¹,

Huang²,

Lin³

et al. 2010

The Angle Orthodontist

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Objective: To test the hypothesis that different nickel-titanium (NiTi) archwires may have dissimilar corrosion resistance in a fluoride-containing oral environment. Materials and Methods: Linear polarization test, a fast electrochemical technique, was used to evaluate the corrosion resistance, in terms of polarization resistance (R p ), of four different commercial NiTi archwires in artificial saliva (pH 6.5) with various NaF concentrations (0%, 0.01%, 0.1%, 0.25%, and 0.5%). Two-way analysis of variance was used to analyze R p with the factors of archwire manufacturer and NaF concentration. Surface characterizations of archwires were analyzed using scanning electron microscopy, atomic force microscopy, and x-ray photoelectron spectroscopy. Results: Both archwire manufacturer and NaF concentration had a significant influence on R p of NiTi archwires. Different surface topography was present on the test NiTi archwires that contained the similar surface chemical structure (TiO 2 and trace NiO). The surface topography did not correspond to the difference in corrosion resistance of the NiTi archwires. Increasing the NaF concentration in artificial saliva resulted in a decrease in R p , or corrosion resistance, of all test NiTi archwires. The NiTi archwires severely corroded and showed similar corrosion resistance in 0.5% NaF-containing environment. Conclusions: Different NiTi archwires had dissimilar corrosion resistance in acidic fluoridecontaining artificial saliva, which did not correspond to the variation in the surface topography of the archwires. The presence of fluoride in artificial saliva was detrimental to the corrosion resistance of the test NiTi archwires, especially at a 0

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Section: Discussionsupporting

confidence: 92%

Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva

Lee¹,

Huang²,

Lin³

et al. 2010

The Angle Orthodontist

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“…Moreover, different techniques are currently being used to obtain coatings of biotolerable materials with mechanical strength and with a bioactive layer [11,12]. Coatings can be produced, for example, by ion sputtering, plasma spraying, sol-gel, electrolysis, and biomimetic methods [6].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of pure titanium in artificial saliva solution

et al. 2009

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The biocompatibility of commercially pure (cp) titanium stems from its chemical stability within an organism, due to a fine film of impermeable titanium oxide covering the metal surface, which guarantees its resistance to corrosion. Despite its biocompatible characteristic, this material does not promote the formation of a hydroxyapatite layer, therefore, many research groups have sought to alter the material's surface, introducing modifications that might influence corrosion resistance. The electrochemical behavior of cp Ti, with hydroxyapatite coating and without hydroxyapatite coating, commonly used in implant materials, was investigated using an artificial saliva solution at 25 o C and pH=7.4. In the conditions of the study it was observed that the hydroxyapatite layer influences the properties of corrosion resistance. This study of the behavior of cp Ti with and without hydroxyapatite coating, in naturally aerated artificial saliva solution at 25 o C, was based on open circuit potential measurements and potentiodynamic polarization curves. At approximately 1x10 -6 A/cm 2 the potential for cp Ti with and without hydroxyapatite coating begins to increase at a faster rate, but at -74mV (SCE) for coated cp Ti and at 180mV (SCE) for uncoated cp Ti the increase in potential begins to slow. This behavior, characterized by a partial stabilization of current density, indicates that in those potential ranges a protective passive film is formed.

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“…5,6 Biocompatibility studies (in vivo, in vitro and usage tests) aim to evaluate the effects of exposure to the metal ions released from orthodontic appliances to the human body. [7][8][9] In order to achieve this, different biomarkers of exposure, such as saliva, blood, urine, hair, nails and oral mucosa cells, are used, with each of them having their advantages and disadvantages. 10,11 Blood, as an invasive biomarker, is more difficult to collect; moreover, blood and saliva have a window of detection, of approximately 36-72 h. Hair is a well-known biomarker, easy to collect and store in keeping with the established laboratory procedures, which can provide information about chronic exposure.…”

mentioning

confidence: 99%

Trace metal ions release from fixed orthodontic appliances and DNA damage in oral mucosa cells by in vivo studies: A literature review

Downarowicz¹,

Mikulewicz²

2017

Adv Clin Exp Med

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An overview of professional literature referring to the release of metal ions from fixed orthodontic appliances and their influence on oral mucosa in conditions of in vivo are presented, along with a detailed analysis of the exposure of the cells of cheek mucosa epithelium to metal ions. Electronic databases (PubMed, Elsevier, Ebsco) were searched with no language restrictions. The relevant orthodontic journals and reference lists were checked for all eligible studies. A total of 38 scientific articles were retrieved in the initial search. However, only 7 articles met the inclusion criteria. Statistically significant differences in the levels of the amount of nickel ions, cobalt ions and chromium ions were observed in cells of cheek mucosa. The most biocompatible material used in the production of fixed orthodontic appliances is titanium, and the least biocompatible material is steel, which releases the largest amount of nickel and chromium. Metal ions are released from fixed orthodontic appliances only in the first phase of treatment. It is recommended to conduct further, long-term research on a larger number of patients to define the influence of using fixed orthodontic appliances and biological effect they might have on tissues.

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Ion release from NiTi orthodontic wires in artificial saliva with various acidities

Cited by 265 publications

References 20 publications

Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva

Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva

Corrosion behavior of pure titanium in artificial saliva solution

Trace metal ions release from fixed orthodontic appliances and DNA damage in oral mucosa cells by in vivo studies: A literature review

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