Antimicrobial effect of titanium dioxide after ultraviolet irradiation against periodontal pathogen

• SHIRAI Ryo

  Department of Oral and Maxillofacial Implantology, Tokyo Dental College Oral Health Science Center, Tokyo Dental College

• MIURA Tadashi

  Oral Health Science Center, Tokyo Dental College

• YOSHIDA Ayaka

  Division of Photomedical Dentistry, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University

• YOSHINO Fumihiko

  Division of Photomedical Dentistry, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University

• ITO Taichi

  Department of Oral and Maxillofacial Implantology, Tokyo Dental College Oral Health Science Center, Tokyo Dental College

• YOSHINARI Masao

  Oral Health Science Center, Tokyo Dental College

• YAJIMA Yasutomo

  Department of Oral and Maxillofacial Implantology, Tokyo Dental College Oral Health Science Center, Tokyo Dental College

抄録

We focused on the antimicrobial effects of titanium dioxide (TiO₂) after stopping ultraviolet (UV) irradiation as an adjunctive treatment for peri-implantitis in this study. The aim was to determine the continuous photocatalytic effects of TiO₂ after UV irradiation and its antimicrobial activity against periodontal pathogen. The continuous photocatalytic effects of TiO₂ after UV irradiation were determined by electron spin resonance (ESR) spectroscopy using TiO₂ particles of various sizes with various UV irradiation times. In addition, antimicrobial activity against Porphyromonas gingivalis was investigated by quantitation of colony-forming units (CFUs). The results showed that the ESR signal ratio for the UV-irradiated TiO₂ was significantly higher than that of the non-irradiated TiO₂. UV-irradiated TiO₂ significantly reduced the number of P. gingivalis when compared with non-irradiated controls. These results suggest that TiO₂ has a continuous photocatalytic effect even after stopping UV irradiation and that it showed antimicrobial activity against periodontal pathogen.

収録刊行物

• Dental Materials Journal

  Dental Materials Journal 35 (3), 511-516, 2016

  日本歯科理工学会

キーワード

• Peri-implantitis
• Antimicrobial
• Photocatalysis
• Electron spin resonance
• Hydroxyl radicals

詳細情報

• CRID: 1390001204717502336
• NII論文ID: 130005155189
• DOI: 10.4012/dmj.2015-406
• ISSN: 18811361
• ISSN: 02874547
• PubMed: 27252009
• Web Site: https://www.jstage.jst.go.jp/article/dmj/35/3/35_2015-406/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可