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Application of quantitative light-induced fluorescence technology for tooth bleaching treatment and its assessment: An in vitro study

Authors
 Joo-Young Lee  ;  Eun-Song Lee  ;  Si-Mook Kang  ;  Baek-Il Kim 
Citation
 PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY, Vol.25 : 208-213, 2019 
Journal Title
 PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY 
ISSN
 1572-1000 
Issue Date
2019
Keywords
Theragnosis ; Quantitative light-induced fluorescence (QLF) ; 405 nm wavelength ; Tooth-bleaching ; Titanium dioxide ; Digital imaging
Abstract
Objectives : This study aimed to determine the efficacy of a combination of photocatalysts—hydrogen peroxide at a low concentration (3.5%) and titanium dioxide (TiO2)—activated at a wavelength of 405 nm using quantitative light-induced fluorescence (QLF) technology, and to quantify their tooth-bleaching efficacy using fluorescence images obtained from QLF technology. Materials and methods : Forty bovine incisors were extrinsically stained according to Stookey’s method, and were randomly divided into four groups (n = 10 per group). Two bleaching solutions were prepared by mixing 3.5% H2O2 with 0.05% of anatase and rutile TiO2 powders. These solutions were applied to the stained teeth using a microbrush and then irradiated for 15 min at either 306 or 405 nm to activate the bleaching agent. The color difference (ΔE*) was assessed before and after every 5 min of treatment. The ΔE* and the changes in the fluorescence loss (ΔΔF) were obtained from white-light and fluorescence images, respectively. Results : All of the low-H2O2/TiO2 treatments caused significant tooth-bleaching efficacy after irradiation at 306 and 405 nm (p < 0.05). The results did not differ significantly between the two wavelengths (p > 0.05), but the bleaching efficacy was greater with anatase TiO2 at 306 nm and rutile TiO2 at 405 nm. Analysis of the fluorescence images revealed that the ΔF values increased significantly in all groups with the treatment time (p < 0.05). There was a statistically significant correlation between ΔE* and the change in ΔΔF (r = 0.822, p < 0.001). Conclusions : Combining low-H2O2/TiO2 with QLF technology at 405 nm has an efficacy of tooth-bleaching as a less harmful and biofriendly method, while the fluorescence images obtained by QLF technology could be used to assess tooth-bleaching.
Full Text
https://www.sciencedirect.com/science/article/pii/S1572100018301431
DOI
10.1016/j.pdpdt.2018.12.001
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Preventive Dentistry and Public Oral Health (예방치과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Baek Il(김백일) ORCID logo https://orcid.org/0000-0001-8234-2327
Lee, Eun Song(이은송) ORCID logo https://orcid.org/0000-0002-2949-4783
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/167482
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