Nano Biomedicine
ORIGINAL ARTICLE
Fluorescence and Mechanical Properties of Y2O3:Eu3+ Nanophosphor-containing Adhesive Resins
Shuichi YAMAGATA1, Takaaki YAMAMOTO1,
Yoshiaki SATO1, Natsumi USHIJIMA2,
Tsukasa AKASAKA3, and Yasuhiro YOSHIDA3
1Department of Orthodontics, Faculty of Dental Medicine and Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
2Support Section for Education and Research, Faculty of Dental Medicine and Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
3Department of Biomedical Materials and Engineering, Faculty of Dental Medicine and Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
Nano Biomed 2020; 12(1): 19-26, (Jun 30, Nano Biomedicine)
Synopsis
Secure removal of remnants on tooth surfaces by rotary cutting instruments after an orthodontic treatment could be guaranteed if the orthodontic adhesive used is highly visible. Fluorescent imaging is a potentially effective solution for increasing the visibility of orthodontic adhesives. In this study, Y2O3:Eu3+ nanoparticles were synthesized by a homogeneous precipitation method followed by firing at 1,000 °C. The size of most of the synthesized nanoparticles was approximately 200 nm in diameter. The photoluminescence properties of the nanoparticles were similar to that of the typical 4f-4f transition of Eu3+. Regardless of the concentration of the particle, the nanoparticles were almost uniformly dispersed and remained in their polymerized bodies without deteriorating the intrinsic flexural modulus of the dimethacrylate resin. Although the fluorescence of the 10 wt%-phosphor-containing resins was adequately recognizable to the naked eye, it was suggested that the preferred concentration of Y2O3:Eu3+ nanoparticles should be more than 10 wt% in terms of fluorescence intensity.
Key words: fluorescence, modulus, orthodontic adhesives, europium, yttrium oxide
All documents in this paper (Free)
J-Stage https://www.jstage.jst.go.jp/article/nano/12/1/12_19/_article
DOI https://doi.org/10.11344/nano.12.19
Secure removal of remnants on tooth surfaces by rotary cutting instruments after an orthodontic treatment could be guaranteed if the orthodontic adhesive used is highly visible. Fluorescent imaging is a potentially effective solution for increasing the visibility of orthodontic adhesives. In this study, Y2O3:Eu3+ nanoparticles were synthesized by a homogeneous precipitation method followed by firing at 1,000 °C. The size of most of the synthesized nanoparticles was approximately 200 nm in diameter. The photoluminescence properties of the nanoparticles were similar to that of the typical 4f-4f transition of Eu3+. Regardless of the concentration of the particle, the nanoparticles were almost uniformly dispersed and remained in their polymerized bodies without deteriorating the intrinsic flexural modulus of the dimethacrylate resin. Although the fluorescence of the 10 wt%-phosphor-containing resins was adequately recognizable to the naked eye, it was suggested that the preferred concentration of Y2O3:Eu3+ nanoparticles should be more than 10 wt% in terms of fluorescence intensity.
Key words: fluorescence, modulus, orthodontic adhesives, europium, yttrium oxide
All documents in this paper (Free)
J-Stage https://www.jstage.jst.go.jp/article/nano/12/1/12_19/_article
DOI https://doi.org/10.11344/nano.12.19