Vita Zahnfabrik H. Rauter Gmbh Co. Kg

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Degudent Gmbh

Dentsply International Inc.

Dentsply Sirona Inc.

Heraeus Edelmetalle Gmbh

Degundent Gmbh

Udo Schusser

Markus Vollmann

Norbert Thiel

Bernhard Durschang

Jörn Probst

Joachim Bibus

Michael Gödiker

Michael Godiker

Joern Probst

Stefan Fecher

Michael Hackner

Martin Kutzner

Carsten Wiesner

Heiner Horhold

Wulf Bramer

Heinz Schneider

Hans Kreutzer

Heiner Hörhold

Jorn Probst

Michael Goediker

Michael GÖDIKER

The invention relates to a method to produce a dental structure with a cavity having a negative form of the structure, which is formed in an investment material, wherein flowable lithium silicate glass ceramic is pressed into the cavity. Thereby a compressive surface stress is created in the ceramic structure through the replacement of lithium ions by alkali ions, in that the model is enriched with alkali compounds and/or the model is covered with a layer of a material containing alkali ions.

Method to produce a dental structure and dental structure

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (LiO.SiO(LiSiO)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallization, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

The invention relates to a blank for producing a dental molded part such as an inlay, onlay, crown or bridge, and to a method for producing the blank. To be able to machine a dental molded part, in particular one having thin wall thicknesses, from the blank without difficulty, the blank is designed to consist of a glass ceramic having a density of between 30 and 60% of theoretical density, and of glass-ceramic powder particles with a particle size distribution d&#x2266;80 &#x3bc;m, lithium silicate crystals being present in an amount of 10 to 90% by volume.

Process for producing a blank, and a blank

The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.

Dental restoration, method for its production and ingot

The invention relates to a method for producing a blank of lithium silicate glass a starting composition of at least 8 wt-% of a stabilizer selected from the group consisting of ZrO, HfO, and mixtures thereof, wherein the method includes the steps of mixing the raw materials comprising the stabilizer in powder form, wherein the powder of the stabilizer has a particle size d=x with 0.3 &#x3bc;m&#x2266;x&#x2266;1.5 &#x3bc;m, melting the raw materials in a crucible at a temperature Tand storing the melt in the crucible for a time t, pouring the homogenized melt into molds, wherein the melt flows out of the crucible with a discharge temperature Tbeing T&#x2267;T, wherein the filling of the molds and the molding of the melt in the molds takes place with a cooling rate A.

Method for producing a lithium silicate glass blank and a lithium silicate glass-ceramic blank

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallization, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

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

The invention relates to glass ceramics based on the lithium metasilicate system (LiOSiO(LiSiO)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.

Lithium silicate glass ceramic, method for production thereof and use thereof

A melting trough made of ceramic material is used for melting small amounts of metal by means of a flame including at least one trough channel which is not closed during operation. A thermosensor having a protective cover extends into the trough which is filled with melt during operation through an aperture in the wall of the trough. The aperture as well as the thermosensor are located below the level of the melt.

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Alzenau, Germany

Udo Schusser