Effects of light sources and visible light-activated titanium dioxide photocatalyst on bleaching

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概要

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• The objective of this study was to evaluate, using methylene blue (MB), the effects of various light sources on the bleaching action of hydrogen peroxide (H2O2) with two titanium dioxide (TiO2) photocatalysts — an ultraviolet light-activated TiO2 photocatalyst (UVTiO2) versus a visible light-activated TiO2 photocatalyst (VL-TiO2). Five experimental solutions (VL-TiO2+H2O2, UV-TiO2+H2O2, H2O2, VL-TiO2, UV-TiO2) were prepared by mixing varying concentrations of H2O2 and/or TiO2 photocatalyst with MB solution. For H2O2-containing solutions (VL-TiO2+H2O2, UV-TiO2+H2O2, and H2O2), the concentration of H2O2 was adjusted to 3.5%. For the four different light sources, low- and high-intensity halogen lamps and blue LED LCUs were used. All the experimental solutions were irradiated by each of the light sources for 7 minutes, and the absorbance at 660 nm was measured every 30 seconds to determine the concentration of MB as an indicator of the bleaching effect. On the interaction between the effects of light source and bleaching treatment, the high-intensity halogen with VL-TiO2+H2O2 caused the most significant reduction in MB concentration. On the effect of light sources, the halogen lamps resulted in a greater bleaching effect than the blue LED LCUs.

• 日本歯科理工学会の論文
• 2009-11-01

著者

• OTSUKI Masayuki

  Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and

• KISHIKAWA Ryuzo

  Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and

• TAGAMI Junji

  Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and

• IKEDA Masaomi

  Faculty of Dentistry, School for Dental Technology, Tokyo Medical and Dental University

• Ikeda Masaomi

  Faculty Of Dentistry School For Dental Technology Tokyo Medical And Dental University

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Of Medical And

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Tagami Junji

  Cariology And Operative Dentistry Tokyo Medical And Dental University

• Tagami Junji

  Cariology & Operative Dentistry Department Of Restorative Dentistry Tokyo Medical And Dental Uni

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Ikeda M

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• SUYAMA Yuji

  Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medica

• OGISU Shinichiro

  Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medica

• KURATA Hiroshi

  Tokyo Research Laboratory, Mitsubishi Gas Chemical Company Inc.

• CHO Takahiro

  Tokyo Research Laboratory, Mitsubishi Gas Chemical Company Inc.

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Science Tokyo Medical And Dental Univers

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Sciences Tokyo Medical And Dental Univer

• Suyama Yuji

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Cho Takahiro

  Tokyo Research Laboratory Mitsubishi Gas Chemical Company Inc.

• Okuma Masako

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Of Medical And

• Kurata Hiroshi

  Tokyo Research Laboratory Mitsubishi Gas Chemical Company Inc.

• Ono Masahiro

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Of Medical And

• Kishikawa Ryuzo

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Of Medical And

• Otsuki Masayuki

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Tagami Junji

  Cariology And Operative Denatistry Department Of Restorative Sciences Graduate School Of Medical And

• Tagami Junji

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Ogisu Shinichiro

  Cariology And Operative Dentistry Department Of Restorative Sciences Graduate School Tokyo Medical A

• Otsuki Masayuki

  Cariology And Operative Dentistry Department Of Restorative Science Graduate School Tokyo Medical And Dental University

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