open access

https://doi.org/10.14943/doctoral.k11250

https://hdl.handle.net/2115/55835

Y₂O₃:Eu³⁺微粒子含有矯正歯科用蛍光ボンディング剤の製造と特性

英語

orthodontic adhesive

2014-03-25

Hokkaido University

Orthodontic adhesives are typically colorless and transparent for aesthetic purposes. The utilization of fluorescence is one of the most effective solutions to make the adhesives visible for safe and complete removal after orthodontic treatments. Eu3+ ions were doped into yttrium oxides (Y2O3) using a homogeneous precipitation method. The crystals synthesized in this study exhibited submicron sizes and a very narrow size distribution. The X-ray diffraction (XRD) patterns agreed well with the known diffraction patterns of Y2O3, and indicated an absence of any other crystalline substances. Therefore, it was determined that the crystals synthesized in this study were in fact Y2O3:Eu3+. The spectra of the poly(methyl methacrylate) (PMMA) adhesives containing Y2O3:Eu3+ particles exhibited characteristic excitation and emission peaks corresponding to the 4f-4f transitions of Eu3+, despite the photoluminescence intensity being relatively low. The yielding loads of the Y2O3:Eu3+ particles contained in the PMMA specimens did not deteriorate by a significant amount. We conclude that it is feasible to add the Eu3+-doped Y2O3 crystalline particles into orthodontic adhesives.

2014-03-25

甲第11250号

博士(歯学)

(主査) 教授 飯田 順一郎, 教授 佐野 英彦, 准教授 赤坂 司

歯学研究科（口腔医学専攻）

博士論文

Version of Record