Bleaching Effect of Blue-Violet-Diode-Laser Irradiation to Tooth Enamel with TiO2 Application

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  • Oka Kenji
    Department of Oral and Maxillofacial Prosthodontics, Institute of Health Biosciences, University of Tokushima Graduate School
  • Inoue Sanshiro
    Chugoku Shikoku Branch (Inoue Dental Clinic)
  • Kawano Takanori
    Department of Oral and Maxillofacial Prosthodontics, Institute of Health Biosciences, University of Tokushima Graduate School
  • Ichikawa Tetsuo
    Chugoku Shikoku Branch (Inoue Dental Clinic)

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  • 二酸化チタン塗布エナメル質への青紫色半導体レーザー照射の影響，漂白効果について
  • Occlusal discomfort syndrome

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Purpose: To investigate bleaching effect of Blue-Violet-Diode-Laser irradiation to tooth enamel with TiO2 agent.<br>Methods: Blue-Violet-Diode-Laser (Nichia), Light Surge (Osada) and Opelaser 03SII (Yoshida) were used as light source for the experiment. TiO2 as the bleaching agent was applied to human enamel, and the surface was irradiated by Blue-Violet-Diode-Laser. The tooth color was evaluated by L*a*b* color system. A handysurf E-30A (Tokyo Seimitsu) was used for measuring the roughness of the enamel surface (Ra) before and after treatment.<br>Results: ΔE levels in the Blue-Violet-Diode-Laser irradiation groups were significantly higher than the other laser treatment groups. The post-treatment Ra in the two groups showed no signi.cant difference compared with the pre-treatment levels.<br>Conclusion: This study suggest that the Blue-Violet-Diode-Laser irradiation could enhance the bleaching effect with TiO2.

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