Ivoclar Vivadent Ag

Harald Bürke

Marcel Schweiger

Volker Rheinberger

Wolfram Höland

Christian Ritzberger

Elke Apel

Elke Signer-Apel

Dmitri G Brodkin

Rudolf Jussel

Ricardo Dellagiacomo

Diana Tauch

Sebastian Krolikowski

Markus Rampf

Wolfram Holland

Vittorio Cadario

Gottfried Rohner

Robert Grünenfelder

Frank Rothbrust

Philipp Kettner

Oliver Voigt

Heinrich Kappert

Thomas Stampfer

Jürgen Seger

Alexander Engels

Ricardo Dellagiacoma

Christian Van t'Hoen

Volker M Rheinberger

Michael Spiegel

Marcel Dipl-Ing Schweiger

Lars Arnold

Wolfram Holand

The present invention relates to a blank for dental purposes which has a first and a second layer which, independently of each other, are based on glass, glass-ceramic or ceramic, wherein the first layer and the second layer differ in colour and form a boundary surface, wherein the boundary surface runs obliquely.

Multi-coloured blank for dental purposes

Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Lithium silicate materials

The invention relates to an arrangement of a furnace and of bulk material of glass particles, said furnace () comprising a pressing punch (), a pressure, distance and/or speed sensor and a control device for controlling a pressing process based on the output signal of the sensor. The sensor detects at least a pressure, position and/or motion parameter of the pressing punch (). The pressing punch () acts on the bulk material of glass particles ()&#x2014;possibly via an interposed ram ()&#x2014;, said glass particles being guided and crystallizable in a press channel (). The trigger criterion for the process control is a change of at least a motion parameter of the pressing punch () upon softening of the bulk material of glass particles () which change is detected by the sensor.

Arrangement of a furnace and of bulk material of glass particles as well as method for operating a furnace

Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.

Method for the preparation of lithium silicate glasses and lithium silicate glass ceramics

A device for producing dental ceramic, with a CAD/CAM device for preparing a compression molding cavity for producing the dental ceramic, wherein a CAD device thereof, on the basis of scan data, determines the shape of the dental ceramic to be produced, and wherein a CAM device thereof produces a positive model, on the basis of which the mold cavity is produced via a sacrificial mold (muffle). The CAM device also determines the distribution and the transfer between different ceramic types, i.e. types of ceramics that differ at least in respect of one parameter in terms of material, appearance, strength or the like, wherein the CAM device for adjusting the distribution and the transfer determines the position and the dimensions of a feed channel between a muffle rod and the compression molding cavity for producing the dental ceramic according to at least one of these parameters.

Device for producing dental ceramic

Pre-sintered blanks based on lithium disilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.

Pre-sintered blank for dental purposes

Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.

Blanks for dental purposes are described which have at least two layers, bonded to one another, of lithium silicate glasses and glass ceramics, wherein the layers differ in color and the layers are monolithic.

Blank for dental purposes

Growing community of inventors

Frastanz, Austria

Harald Bürke