The effect of ultraviolet light pre-treatment of titanium dioxide photocatalyst on bleaching effect

• Project/Area Number: 24792032
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Conservative dentistry
• Research Institution: Health Sciences University of Hokkaido
• Principal Investigator: KONO Mai 北海道医療大学, 歯学部, 講師 (90586926)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
• Keywords: 歯学 / 漂白 / 二酸化チタン / 光機能化

Outline of Final Research Achievements

UV light treatment is thought to counteract biological aging of titanium implant. UV light treatment of aged titanium surfaces decomposes hydrocarbons by inducing photocatalytic activity and restores superhydrophilicity.　I focused on the effect of hydrocarbon decontaminantion on the titanium surfaces. In this study, I examined the hypothesis that UV light pretreatment of TiO2 accelerates a photocatalytic reaction and enchances the bleaching effect of the TiO2-H2O mixture. I investigated the photocatalytic activity by measuring the color change before and after the bleaching. The results suggested that the appropriate pretreatment condition can maximize the bleaching effect of the TiO2-H2O mixture.

Research Products

• [Presentation] 紫外線照射による二酸化チタン光触媒の前処理が漂白効果に与える影響 (2014)
  • Author(s): 河野 舞、會田英紀、越野 寿
  • Organizer: 第25回日本歯科審美学会学術大会
  • Place of Presentation: 香川県高松市 高松国際ホテル
  • Year and Date: 2014-11-22 – 2014-11-23
• [Presentation] NaOCl-mediated Biofunctionalization Enhances Bone-titanium Integration (2013)
  • Author(s): Kono M, Ichioka Y, Aita H, Endo K, Koshino H
  • Organizer: International Association for Dental Research
  • Place of Presentation: Washington State Convention Center in Seattle（ワシントン州シアトル市・米国）
• [Presentation] 化学洗浄処理群がチタンインプラントの骨結合に与える影響 (2012)
  • Author(s): 河野 舞、會田英紀、市岡勇輝、問 貴司、奥田幸一、遠藤一彦、越野 寿
  • Organizer: 日本補綴歯科学会第121回学術大会
  • Place of Presentation: 神奈川県民ホール（横浜県）
• [Presentation] NaOCl溶液を用いた化学洗浄処理はチタンインプラントの骨結合性を向上させる (2012)
  • Author(s): 河野 舞、會田英紀、市岡勇輝、遠藤一彦、越野 寿
  • Organizer: 第42回日本口腔インプラント学会・学術大会
  • Place of Presentation: 大阪国際会議場（大阪府）