DENTAL PREPARATION FOR MILLING, METHOD OF ITS PRODUCTION AND USE Russian patent published in 2019 - IPC A61C13/00 C04B35/48 C04B41/45 

FIELD: chemistry.

SUBSTANCE: present invention relates to a coloured zirconium ceramic dental workpiece for milling, having fluorescent properties, to methods of making such a workpiece for milling. It can be used for production of zirconium ceramic dental prostheses. Dental preparation for milling has a shape allowing to attach or fix this dental workpiece for milling in a device for mechanical processing, wherein dental preparation for milling contains porous zirconium material. Porous zirconium material contains oxides: Zr oxide in terms of ZrO₂ 80–97 wt. %, Al oxide in terms of Al₂O₃ 0–0.15 wt. %, Y-oxide in terms of Y₂O₃ 1–10 wt. %, Bi oxide in terms of Bi₂O₃ 0.01–0.20 wt. %, Tb-oxide in terms of Tb₂O₃ 0.01–0.8 wt. %, optionally at least one of Er oxide in terms of Er₂O₃ 0.01–3.0 wt. % and Mn oxide in terms of MnO₂ 0.0001–0.08 wt. %. Porous zirconium material does not contain more than 0.01 wt. % of Fe oxide in terms of Fe₂O₃. Blank is obtained by mixing powders of corresponding oxides and pressing the mixture.

EFFECT: optimization of fluorescent properties of the workpiece.

15 cl, 2 ex