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Chung-ju Hwang - One of the best experts on this subject based on the ideXlab platform.
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Corrosion resistance of titanium-silver alloys in an Artificial Saliva containing fluoride ions.
Journal of Biomedical Materials Research Part B, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium–silver alloys. Titanium and titanium–silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium–silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium–silver alloys with a high silver content (3.0–4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium–silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
Her-hsiung Huang - One of the best experts on this subject based on the ideXlab platform.
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Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva
The Angle orthodontist, 2010Co-Authors: Tzu-hsin Lee, Ta-ko Huang, Shu-yuan Lin, Li-kai Chen, Ming-yung Chou, Her-hsiung HuangAbstract:Abstract 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 (Rp), 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 Rp 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 Rp of NiTi archwires. Different surface topography was present on the test NiTi archwires that contained the similar surface chemical structure (TiO2 and trace NiO). The sur...
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corrosion resistance of titanium containing dental orthodontic wires in fluoride containing Artificial Saliva
Journal of Alloys and Compounds, 2009Co-Authors: Tzu-hsin Lee, Ta-ko Huang, Li-kai Chen, Ming-yung Chou, Chiaching Wang, Her-hsiung HuangAbstract:Abstract This study was to investigate the corrosion resistance of different Ti-containing dental orthodontic wires (including Ni–Ti, Ni–Ti–Cu, Ti–Mo–Zr–Sn, and Ti–Nb alloys) in acidic fluoride-containing Artificial Saliva using cyclic potentiodynamic polarization curve measurements. Different NaF concentrations (0%, 0.2%, and 0.5%), simulating the fluoride contents in commercial toothpastes, were added to the Artificial Saliva. Surface characterization was analyzed using X-ray photoelectron spectrometry. Cyclic potentiodynamic polarization curves showed that the presence of fluoride ions, especially 0.5% NaF, was detrimental to the protective ability of the TiO2-based film on the Ti-containing wires. This might lead to a decrease in the corrosion resistance of the tested alloys, i.e. an increase in the corrosion rate and anodic current density and a decrease in the passive film breakdown potential. Among the tested Ti-containing wires, the Ni–Ti and Ni–Ti–Cu wires containing mainly TiO2 on surface film were more susceptible to fluoride-enhanced corrosion, while the Ti–Mo–Zr–Sn and Ti–Nb wires containing MoO3/ZrO2/SnO and Nb2O5, respectively, along with TiO2 on surface film were pitting corrosion resistant and showed a lower susceptibility to fluoride-enhanced corrosion. The difference in corrosion resistance of the tested commercial Ti-containing dental orthodontic wires was significantly dependent on the passive film characteristics on wires’ surface.
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electrochemical impedance spectroscopy study of ti 6al 4v alloy in Artificial Saliva with fluoride and or bovine albumin
Dental Materials, 2005Co-Authors: Her-hsiung Huang, Tzu-hsin LeeAbstract:Summary Objectives To investigate the electrochemical mechanism of Ti–6Al–4V alloy in acidic Artificial Saliva with NaF and/or bovine albumin (BA). Methods The electrochemical behavior of Ti–6Al–4V alloy was investigated using electrochemical impedance spectroscopy (EIS) measurements at the open circuit potentials. The electrolytes used included Artificial Saliva with 0–0.5% NaF, with 0.1% NaF+0.01–0.5% BA, and with 0.01–0.5% BA at pH 5 and 37 °C. One-way ANOVA was used to analyze the influence of NaF and BA concentration on the polarization resistance ( R p ) obtained from the EIS data. Surface chemical analyses were performed with X-ray photoelectron spectroscopy. Results The impedance was mainly characterized by the resistance and capacitance of a protective TiO 2 -based passive film on Ti–6Al–4V alloy when NaF concentration was low (≤0.01%). When NaF concentration was higher than 0.1%, the impedance was characterized by two capacitive and one inductive effects, which were related to the metal's charge transfer reaction and the decayed TiO 2 -based oxide film (capacitive effects), and the relaxation of the adsorbed Ti–F complex compound (inductive effect). The addition of 0.01–0.5% BA in 0.1% NaF-containing Artificial Saliva significantly increased the impedance of Ti–6Al–4V alloy compared to that without BA addition ( p p >0.05). Significance The EIS measurement technique is suitable for the study of the electrochemical behavior of dental alloy. The electrochemical mechanism of Ti–6Al–4V alloy in Artificial Saliva is related to the fluoride and bovine albumin concentration.
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corrosion resistance of stressed niti and stainless steel orthodontic wires in acid Artificial Saliva
Journal of Biomedical Materials Research Part A, 2003Co-Authors: Her-hsiung HuangAbstract:The purpose of this study was to investigate the corrosion resistance of stressed NiTi and stainless steel orthodontic wires using cyclic potentiodynamic and potentiostatic tests in acid Artificial Saliva at 37 degrees C. An atomic force microscope was used to measure the 3-D surface topography of as-received wires. Scanning electron microscope observations were carried out before and after the cyclic potentiodynamic tests. The surface chemical analysis was characterized using X-ray photoelectron spectroscopy and Auger electron spectroscopy after the potentiostatic tests. The cyclic potentiodynamic test results showed that the pH had a significant influence on the corrosion parameters of the stressed NiTi and stainless steel wires (p 0.05). For all pH and load conditions, stainless steel wire showed higher pitting potential and wider passive range than NiTi wire (p < 0.001), whereas NiTi wire had lower passive current density than stainless steel wire (p < 0.001). The corrosion resistance of the stressed NiTi and stainless steel wires was related to the surface characterizations, including surface defect and passive film.
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Ion release from NiTi orthodontic wires in Artificial Saliva with various acidities.
Biomaterials, 2003Co-Authors: Her-hsiung Huang, Yu-hui Chiu, Tzu-hsin Lee, Hui-wen Yang, Chii-chih HsuAbstract:NiTi orthodontic wire products from different manufacturers would have different corrosion resistance. We assayed the corrosion resistance, in terms of ion release, of different NiTi orthodontic wires in Artificial Saliva with various acidities. Four types of as-received commercial NiTi orthodontic wires were immersed in Artificial Saliva (37 degrees C) at pH 2.5-6.25 for different periods (1-28d). The amount of Ni and Ti ions released from NiTi wires was determined using an atomic adsorption spectrophotometer. Surface morphology and roughness of wires were related to the corrosion resistance. Results showed that the manufacturer, pH value, and immersion period, respectively, had a significantly statistical influence on the release amount of Ni and Ti ions. The amount of Ni ions released in all test solutions was well below the critical value necessary to induce allergy and below daily dietary intake level. The amount of Ti ions released in pH>/=3.75 solution was mostly not detectable, representing that the TiO(2) film on NiTi wires exhibited a good protection against corrosion. Pre-existed surface defects on NiTi wires might be the preferred locations for corrosion. The NiTi wire with the highest release amount of metal ions had the maximal increase in surface roughness after immersion test, while a rougher surface did not correspond to a higher metal ion release.
Hyung-min Shim - One of the best experts on this subject based on the ideXlab platform.
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Corrosion resistance of titanium-silver alloys in an Artificial Saliva containing fluoride ions.
Journal of Biomedical Materials Research Part B, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium–silver alloys. Titanium and titanium–silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium–silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium–silver alloys with a high silver content (3.0–4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium–silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
Tzu-hsin Lee - One of the best experts on this subject based on the ideXlab platform.
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Corrosion Resistance of Different Nickel-Titanium Archwires in Acidic Fluoride-containing Artificial Saliva
The Angle orthodontist, 2010Co-Authors: Tzu-hsin Lee, Ta-ko Huang, Shu-yuan Lin, Li-kai Chen, Ming-yung Chou, Her-hsiung HuangAbstract:Abstract 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 (Rp), 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 Rp 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 Rp of NiTi archwires. Different surface topography was present on the test NiTi archwires that contained the similar surface chemical structure (TiO2 and trace NiO). The sur...
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corrosion resistance of titanium containing dental orthodontic wires in fluoride containing Artificial Saliva
Journal of Alloys and Compounds, 2009Co-Authors: Tzu-hsin Lee, Ta-ko Huang, Li-kai Chen, Ming-yung Chou, Chiaching Wang, Her-hsiung HuangAbstract:Abstract This study was to investigate the corrosion resistance of different Ti-containing dental orthodontic wires (including Ni–Ti, Ni–Ti–Cu, Ti–Mo–Zr–Sn, and Ti–Nb alloys) in acidic fluoride-containing Artificial Saliva using cyclic potentiodynamic polarization curve measurements. Different NaF concentrations (0%, 0.2%, and 0.5%), simulating the fluoride contents in commercial toothpastes, were added to the Artificial Saliva. Surface characterization was analyzed using X-ray photoelectron spectrometry. Cyclic potentiodynamic polarization curves showed that the presence of fluoride ions, especially 0.5% NaF, was detrimental to the protective ability of the TiO2-based film on the Ti-containing wires. This might lead to a decrease in the corrosion resistance of the tested alloys, i.e. an increase in the corrosion rate and anodic current density and a decrease in the passive film breakdown potential. Among the tested Ti-containing wires, the Ni–Ti and Ni–Ti–Cu wires containing mainly TiO2 on surface film were more susceptible to fluoride-enhanced corrosion, while the Ti–Mo–Zr–Sn and Ti–Nb wires containing MoO3/ZrO2/SnO and Nb2O5, respectively, along with TiO2 on surface film were pitting corrosion resistant and showed a lower susceptibility to fluoride-enhanced corrosion. The difference in corrosion resistance of the tested commercial Ti-containing dental orthodontic wires was significantly dependent on the passive film characteristics on wires’ surface.
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electrochemical impedance spectroscopy study of ti 6al 4v alloy in Artificial Saliva with fluoride and or bovine albumin
Dental Materials, 2005Co-Authors: Her-hsiung Huang, Tzu-hsin LeeAbstract:Summary Objectives To investigate the electrochemical mechanism of Ti–6Al–4V alloy in acidic Artificial Saliva with NaF and/or bovine albumin (BA). Methods The electrochemical behavior of Ti–6Al–4V alloy was investigated using electrochemical impedance spectroscopy (EIS) measurements at the open circuit potentials. The electrolytes used included Artificial Saliva with 0–0.5% NaF, with 0.1% NaF+0.01–0.5% BA, and with 0.01–0.5% BA at pH 5 and 37 °C. One-way ANOVA was used to analyze the influence of NaF and BA concentration on the polarization resistance ( R p ) obtained from the EIS data. Surface chemical analyses were performed with X-ray photoelectron spectroscopy. Results The impedance was mainly characterized by the resistance and capacitance of a protective TiO 2 -based passive film on Ti–6Al–4V alloy when NaF concentration was low (≤0.01%). When NaF concentration was higher than 0.1%, the impedance was characterized by two capacitive and one inductive effects, which were related to the metal's charge transfer reaction and the decayed TiO 2 -based oxide film (capacitive effects), and the relaxation of the adsorbed Ti–F complex compound (inductive effect). The addition of 0.01–0.5% BA in 0.1% NaF-containing Artificial Saliva significantly increased the impedance of Ti–6Al–4V alloy compared to that without BA addition ( p p >0.05). Significance The EIS measurement technique is suitable for the study of the electrochemical behavior of dental alloy. The electrochemical mechanism of Ti–6Al–4V alloy in Artificial Saliva is related to the fluoride and bovine albumin concentration.
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Ion release from NiTi orthodontic wires in Artificial Saliva with various acidities.
Biomaterials, 2003Co-Authors: Her-hsiung Huang, Yu-hui Chiu, Tzu-hsin Lee, Hui-wen Yang, Chii-chih HsuAbstract:NiTi orthodontic wire products from different manufacturers would have different corrosion resistance. We assayed the corrosion resistance, in terms of ion release, of different NiTi orthodontic wires in Artificial Saliva with various acidities. Four types of as-received commercial NiTi orthodontic wires were immersed in Artificial Saliva (37 degrees C) at pH 2.5-6.25 for different periods (1-28d). The amount of Ni and Ti ions released from NiTi wires was determined using an atomic adsorption spectrophotometer. Surface morphology and roughness of wires were related to the corrosion resistance. Results showed that the manufacturer, pH value, and immersion period, respectively, had a significantly statistical influence on the release amount of Ni and Ti ions. The amount of Ni ions released in all test solutions was well below the critical value necessary to induce allergy and below daily dietary intake level. The amount of Ti ions released in pH>/=3.75 solution was mostly not detectable, representing that the TiO(2) film on NiTi wires exhibited a good protection against corrosion. Pre-existed surface defects on NiTi wires might be the preferred locations for corrosion. The NiTi wire with the highest release amount of metal ions had the maximal increase in surface roughness after immersion test, while a rougher surface did not correspond to a higher metal ion release.
Keun Taek Oh - One of the best experts on this subject based on the ideXlab platform.
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Corrosion resistance of titanium-silver alloys in an Artificial Saliva containing fluoride ions.
Journal of Biomedical Materials Research Part B, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium–silver alloys. Titanium and titanium–silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium–silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium–silver alloys with a high silver content (3.0–4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium–silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
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corrosion resistance of titanium silver alloys in an Artificial Saliva containing fluoride ions
Journal of Biomedical Materials Research, 2005Co-Authors: Hyung-min Shim, Keun Taek Oh, Chung-ju HwangAbstract:Dental gels and rinses for caries prophylactic contain fluoride at concentrations ranging from 0.1 to 1%. In addition, many types of fluoride-releasing materials have been used in dental applications. The purpose of the study was to investigate the addition effect of fluoride into Artificial Saliva on the corrosion resistance of pure titanium and titanium-silver alloys. Titanium and titanium-silver alloys were arc melted, homogenized at 950°C for 72 h, hot rolled, and solution heat treated and quenched. In order to investigate the effect of the fluoride ions on the corrosion resistance, potentiodynamic polarization testing, potentiostatic testing, and open-circuit potential measurements were performed in plain Artificial Saliva and 0.1 and 1% NaF-added Artificial Saliva. The passive current densities of titanium and titanium-silver alloys increased with increasing fluoride-ion concentration. Ti2.0Ag and Ti3.0Ag exhibited a low current density relatively and showed a stable behavior compared to titanium. The open-circuit potential of titanium decreased and current density at 250 mV (SCE) potentiostatic testing reacted sensitively with increasing fluoride concentration. On the other hand, the open-circuit potential of titanium-silver alloys with a high silver content (3.0-4.0 at %) reacted less sensitively to the fluoride-ion concentration. Among titanium-silver alloys, Ti3.0Ag alloy had a higher resistance against the attack of fluoride ions and showed a more stable open-circuit potential and current density than titanium in the fluoride-containing solution. It is concluded that they are electrochemically stable and maintained good corrosion resistance in fluoride-containing Artificial Saliva.
