| 摘要 |
The invention relates to an opalescent glass-ceramic product, especially an opalescent glass-ceramic product as a dental material or as an additive to o r component of dental material, comprising at least the components SiO2, Al2O3 , P2O5, Na2O, K2O, CaO and Me(IV)O2. In order to obtain improved opalescence with improved transparency, in addition to fluorescence, thermal expansion a nd a combustion temperature adapted to other materials, the opalescent ceramic product is devoid of ZrO2 and TiO2or is essentially devoid of ZrO2 and TiO2, such that the Me(II)O content in the glass ceramic is less than approximatel y 4 wt. % and the Me(IV)O2 content amounts to approximately 0.5 - 3 wt. %. The invention also relates to a method for the production of the opalescent glas s- ceramic product. The glass-ceramic product can be used as dental material or as an additive to or a component of dental material. |
