Influence of electrolytic treatment time on the corrosion resistance of Ni-Ti orthodontic wire
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概要
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The purpose of this study was to examine the use of electrolytic treatment, which can improve the corrosion resistance of Ni-Ti orthodontic wires, to minimize adverse effects. Electrolytic treatment of Ni-Ti wires was performed in a solution composed of glycerol and lactic acid for 5, 15, or 30 min. The anodic polarization test, three-point bending test, and X-ray photoelectron spectroscopic analysis of the wire surface were performed to explore an optimal treatment condition. Breakdown potentials of treated wires increased with increasing treatment time and higher corrosion resistance was obtained by performing the electrolytic treatment for more than 5 min. The relative concentration of nickel in the layer was decreased in inverse proportion to the treatment time. The results suggest that the commercial Ni-Ti wire with low corrosion resistance can be improved by the electrolytic treatment for more than 5 min.
著者
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Hanawa Takao
Institute For Biomaterials And Bioengineering
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Yoneyama Takayuki
Department Of Dental Materials Nihon University School Of Dentistry
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Tsutsumi Yusuke
Institute Of Biomaterials And Bioengineering Tokyo Medical And Dental University
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Shimizu Noriyoshi
Department Of Orthodontics Nihon University School Of Dentistry
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Namura Yasuhiro
Department Of Orthodontics Nihon University School Of Dentistry
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KANETO Maki
Major in Orthodontics, Nihon University Graduate School of Dentistry
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TAMURA Takahiko
Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
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