Novel Eu2 -doped 3Y-TZP bioceramics with fluorescence similar to natural teeth

作者：Shi Lianshui; Zhao Fujian; Zhou Xuezhen; Chen Weifan; Li Yongxiu^*

来源：Ceramics International, 2014, 40(8): 13729-13733.

DOI：10.1016/j.ceramint.2014.05.014

• 3Y-TZP
• Cytotoxicity
• Dental restorations
• Eu2 -doping
• Fluorescence

Motivated by dental applications, a novel Eu2+-doped 3Y-TZP dental bioceramic with fluorescence similar to natural teeth was prepared by calcination of molded powders comprising 3 mol% Eu2O3 and 97 mol% 3Y-TZP under reducing atmosphere. The fluorescent properties of 3Y-TZP discs containing 6 mol% Eu2+ or not were characterized and compared with those of natural tooth. The phase constitution, surface microstructure and some mechanical properties of Eu2+-doped 3Y-TZP and 3Y-TZP discs were also investigated. Finally, the cytotoxicity of 6 mol% Eu2+-doped 3Y-TZP disc was evaluated from biocompatible viewpoints. The result shows that the 6 mol% Eu2+-doped 3Y-TZP disc can reproduce the fluorescence of natural teeth with the broad blue green emission band centered at 490 nm under irradiation of 365 nm, which corresponds to 4f(6)5d -> 4e(7) transition of Eu2+. Moreover, doping 6 mol% Eu2+ into 3Y-TZP not only has no obvious effect on tetragonal phase, grain growth and mechanical properties of 3Y-TZP disc but also shows high biological safety. Therefore, Eu2+-doped 3Y-TZP bioceramics are promising fluorescent bioceramics for dental restorations combining esthetic with biocompatibility.

• 出版日期2014-9
• 单位南昌大学