Dentsply Sirona Inc.

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Vita Zahnfabrik H. Rauter Gmbh Co. Kg

Degudent Gmbh

Carsten Wiesner

Markus Vollmann

Stefan Fecher

Lothar Volkl

Irmgard Wissel

Marcel Meegdes

Norbert Thiel

Udo Schusser

Bernhard Durschang

Jörn Probst

Michael Gödiker

Michael Godiker

Lothar Voelkl

Jorn Probst

The invention relates to a method for the production of a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a mold and wherein the materials are pressed and after pressing are sintered. Thereby, a layer of the first ceramic material is filled into the mold, a first open cavity is formed in the layer, the second ceramic material is filled into the first open cavity and the materials are pressed together and are then heat-treated. Both the first ceramic material and the second ceramic material contain, or consists of, lithium silicate glass ceramic.

Method for the production of a blank, blank and a dental restoration

The invention relates to a lithium silicate glass ceramic, which contains at least lithium disilicate as a crystal phase, and lithium aluminum silicate as further crystal phase. The lithium silicate glass ceramic in its initial composition contains AlOat 1.5 to 3.5 percent by weight, and KO at 0.6 to 1.8 percent by weight.

Lithium silicate glass ceramic

The invention relates to a method for the production of a restoration from a blank consisting of, or containing, a lithium silicate glass ceramic, wherein at least two layers of ceramic material of different compositions are filled into a mold layer-by-layer and after filling of the layers they are then pressed and sintered, wherein after filling of a first layer this is structured on its surface in such a way that the first layer, viewed across its surface, differs in its height from region to region, and then a layer with a composition that differs from the first layer is filled as a second layer into the mold. After sintering the dental restoration is produced from the blank by mechanical working.

Method for the production of a dental restoration

The invention relates to glass ceramics, which show high strength, high translucency, high chemical stability and which are still mechanically processible. The invention further refers to a method for producing a dental restoration comprising such glass or glass ceramic as well as the dental restoration itself.

Dental restoration, method for production thereof and glass ceramic

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Rockenberg, Germany

Carsten Wiesner