Bleaching of stained resin using nitrogen doped-TiO₂ nanoparticles
10.14815/kjdm.2019.46.3.175
- Author:
Keun MOON
1
;
Sang Bong JUNG
;
Hyo Joung SEOL
;
Jung Sook KANG
;
Yong Hoon KWON
Author Information
1. Department of Oral Biochemistry, School of Dentistry, Pusan National University, Korea.
- Publication Type:Original Article
- Keywords:
Bleaching agent;
N-doped TiO₂;
Absorbance;
XRD;
Color difference
- MeSH:
Methods;
Methylene Blue;
Nanoparticles;
Nitrogen;
Tin;
Tooth Bleaching Agents;
X-Ray Diffraction
- From:
Korean Journal of Dental Materials
2019;46(3):175-184
- CountryRepublic of Korea
- Language:English
-
Abstract:
There has been increasing use of the H₂O₂-based teeth bleaching agents. The purpose of this study was to evaluate the bleaching effectiveness of the laser irradiation combined with nitrogen doped-TiO₂ nanoparticles (NPs) on the stained resin. Nitrogen (N) doped-TiO₂ NPs were prepared under sol-gel method. Light absorbance, X-ray diffraction patterns of NPs, and bleaching of methylene blue and stained resins were evaluated. For bleaching of stained resin, NPs-containing gel was used. For irradiation, light of two different wavelengths was used. Unlike TiO₂, N-TiO₂ showed high absorbance after 400 nm. N-TiO₂, which have used TiN as a precursor, showed a new rutile phase at the TiN structure. For methylene blue solution, N-TiO₂ with 3% H₂O₂ resulted in the greatest absorbance decrease after laser irradiation regardless of wavelength. For stained resin test, N-TiO₂ with 3% H₂O₂ resulted in the greatest color difference after laser irradiation, followed by group that used N-TiO₂ without 3% H₂O₂.
