Abstract: The disclosure relates to metal oxide powders with a bimodal particle size distribution, to ceramics that can be made from these metal oxide powders, especially milling ceramics for use in dental technology, to a method for the production of the metal oxide powders and of the ceramics, to the use of nanoscale metal oxide powders for the production of the metal oxide powders and of the ceramics as well as to dental ceramic products.

Abstract: The disclosure relates to a leucite glass ceramic doped with nanoscale metal oxide, to a doped leucite glass ceramic powder suitable for its production, to a method for producing the doped leucite glass ceramic, to its use as dental material, to a dental product containing it and to the use of the nanoscale metal oxide powders for the production of the doped glass ceramic or of the doped leucite glass ceramic powder.

Abstract: The invention relates to a glass-ceramic material for dental restoration having a high crystalline leucite content. The leucite crystals are needle- or rod-shaped, have a thickness of between 0.3 and 1.5 micrometers and are between 7.5 and 20 micrometers in length. Said glass-ceramic material is substantially semi-transparent and contains, in% by weight: between 67 and 71% SiO2, between 8 and 12% Al2O3, between 3 and 5% Na2O, between 8 and 10% K2O, between 1 and 3% CaO, between 0.2 and 2% BaO, between 0.5 and 2% CeO2, between 0.2 and 1% TiO2 and between 0.5 and 2% B2O3. The above glass-ceramic material presents improved fracture strength and offers new indications for the use of full ceramic materials in dental technology, notably metal-free dental restoration.