In Vitro Corrosion of Dental Ag-based Alloys in Polyvinylpyrrolidone Iodine Solution

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概要

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• The corrosion and tarnish behaviors of three Ag-based alloys (Ag-Pd-Cu-Au alloy, Ag-In alloy, and Ag-Sn-Zn alloy) in polyvinylpyrrolidone iodine (povidone-iodine) solution were examined. The degree of tarnish was evaluated by visible-ray spectrocolorimetry. Corrosion potential measurements and analyses of corrosion products by X-ray diffractometry were carried out to elucidate the corrosion mechanism. The corrosion rate of the three Ag-based alloys in povidone-iodine solution at its practical concentration used as a gargle solution was so fast that the alloys tarnished within 10 seconds of immersion with the formation of AgI. Thermodynamic consideration and the results of surface analysis by X-ray diffractometry revealed that the main anodic and cathodic reactions were Ag+I^-→AgI+e^- and I_2+2e^-→2I^- respectively.

• 日本歯科理工学会の論文

著者

• MATSUBARA Hideki

  Department of Material Physics,Faculty of Engineering Science,Osaka University

• Endo Kazuhiko

  Division Of Biomaterials And Bioengineering Department Of Oral Rehabilitation School Of Dentistry He

• Endo Kazuhiko

  Silicon Systems Research Laboratories Nec Corporation

• Endo Kazuhiko

  Department Of Dental Materials Science School Of Dentistry Health Sciences University Of Hokkaido

• Matsubara Hideki

  北海道医療大学 歯学部クラウンブリッジ･インプラント補綴学

• Matsubara Hideki

  Department Of Clinical Chemistry Faculty Of Pharmaceutical Sciences Kinki University

• OHNO Hiroki

  Department of Dental Materials Science, School of Dentistry, Health Sciences University of Hokkaido,

• Tamura Makoto

  Department Of Dental Science Personalized Health Science Center Health Sciences University Of Hokkai

• MAIDA Takeo

  Department of Dental Science, Personalized Health Science Center, Health Sciences University of Hokk

• Maida Takeo

  Department Of Dental Science Personalized Health Science Center Health Sciences University Of Hokkai

• Endo Kazuhiko

  Department Of Dental Materials Science Health Sciences University Of Hokkaido School Of Dentistry

• Endo Kazuhiko

  Department Of Dental Materials Science School Of Dentistry Health Science University Of Hokkaido

• Ohno Hiroki

  北海道医療大学 歯学部歯科矯正学

• Ohno H

  Division Of Biomaterials And Bioengineering Department Of Oral Rehabilitation School Of Dentistry He

• Ohno Hiroki

  Department Of Biology Kyoto University Of Education

• OCHI Morio

  Department of Fixed Prosthodontics, School of Dentistry, Health Sciences University of Hokkaido

• TAKASUSUKI Norio

  Department of Fixed Prosthodontics, School of Dentistry, Health Sciences University of Hokkaido

• Ochi Morio

  Department Of Fixed Prosthodontics School Of Dentistry Health Sciences University Of Hokkaido

• Takasusuki Norio

  Department Of Fixed Prosthodontics School Of Dentistry Health Sciences University Of Hokkaido

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