Ivoclar Vivadent Ag

Frank Rothbrust

Christian Ritzberger

Wolfram Höland

Volker Rheinberger

Elke Apel

Helen Reveron

Nicolas Courtois

Jérôme Chevalier

Marcel Schweiger

Dmitri G Brodkin

Gottfried Rohner

Robert Grünenfelder

Harald Kerschbaumer

Ricardo Dellagiacomo

Sebastian Krolikowski

Harald Bürke

Rudolf Jussel

Walter Pokorny

Heinrich Kappert

Jerome Chevalier

Elke Signer-Apel

Diana Tauch

Ajmal Khan

Ronny Hengst

Stefan Lerch

Jürgen Seger

Theresa Senti

Sasa Lukic

Volker M Rheinberger

Khan Ajmal

Rudolf Jüssel

Bo Jiang

Corina Serban

Lars Arnold

Roman Caduff

José Pulido

Katja Ott

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

The present invention relates to a pre-sintered multi-layered dental mill blank comprising a top layer, a bottom layer, and at least one intermediate layer. The pre-sintered multi-layered dental mill blank or a part prepared thereof has one or more desirable properties when being fully sintered by a speed sintering process. The present invention also relates to a process for preparing a dental restoration using the pre-sintered multi-layered dental mill blank as well as to a dental restoration as such. The present invention further relates to a process for sintering a dental restoration precursor.

Pre-sintered multi-layered dental mill blank, process for preparing the same, and uses thereof, and a sintering process

The invention relates to a process for the production of a dental restoration, in which an oxide ceramic material

Process for the production of a dental restoration

The invention relates to multi-layer oxide ceramic bodies and in particular to presintered multi-layer oxide ceramic blanks and oxide ceramic green bodies suitable for dental applications. These bodies can be thermally densified by further sintering without distortion and are thus particularly suitable for the manufacture of dental restorations. The invention also relates to a process for the manufacture of such multi-layer oxide ceramic bodies as well as to a process for the manufacture of dental restorations using the multi-layer oxide ceramic bodies.

Controlling of sintering kinetics of oxide ceramics

A process for producing a glazed ceramic body, in which a glazing material is applied to a non-densely sintered substrate material and the substrate material and the glazing material are subjected to a heat treatment in order to obtain the glazed body.

Process for producing a glazed ceramic body

The present invention is directed to a porous pre-densified CeO-stabilized ZrOceramic having a density of 50.0 to 95.0%, relative to the theoretical density of zirconia, and an open porosity of 5 to 50% as well as to a densified CeO-stabilized ZrOceramic having a density of 97.0 to 100.0%, relative to the theoretical density of zirconia, and wherein the grains of the ceramic have an average grain size of 50 to 1000 nm, methods for the preparation of the pre-densified and densified ceramics and their use for the manufacture of dental restorations.

CeO2-stabilized ZrO2 ceramics for dental applications

The present invention is directed to a porous pre-densified CeOstabilized ZrOceramic having a density of 50.0 to 95.0%, relative to the theoretical density of zirconia, and an open porosity of 5 to 50% as well as to ceramic having a density of 97.0 to 100.0%, relative to the theoretical density of zirconia, and wherein the grains of the ceramic have an average grain size of 50 to 1000 nm, methods for the preparation of the pre-densified and densified ceramics and their use for the manufacture of dental restorations.

[object Object]

The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 501 K/min, in particular more than 1001 K/min, which heats the furnace to at least 10001 C., in particular to 1100-12501 C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (), and wherein this is followed by an end heating-up period () during which heating up is effected at a heating-up rate of more than 301 K/min, in particular approximately 501 K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace () is performed after this.

Dental furnace

The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 501 K/min, in particular more than 1001 K/min, which heats the furnace to at least 10001 C, in particular to 1100-12501 C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (), and wherein this is followed by an end heating-up period () during which heating up is effected at a heating-up rate of more than 301 K/min, in particular approximately 501 K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace () is performed after this.

The invention relates to a composite ceramic material which comprises: The invention also relates to a ceramic powder composition, processes for the preparation of the composite ceramic material and the ceramic powder composition as well as uses thereof.

Composite ceramic material comprising zirconia

Process for producing an inorganic-inorganic composite material, in which an open-pore, crystalline oxide ceramic shaped part is produced from an oxide ceramic powder or a powder of an oxide ceramic mixture after shape-imparting processing and presintering, an infiltration substance is applied to this shaped part in vacuo and at room temperature, and the oxide ceramic is sintered in a densifying manner under an air atmosphere and at ambient pressure to form an inorganic-inorganic composite material.

Inorganic-inorganic composite material and method for producing the same

The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 50&#xb0; K/min, in particular more than 100&#xb0; K/min, which heats the furnace to at least 1000&#xb0; C., in particular to 1100-1250&#xb0; C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (), and wherein this is followed by an end heating-up period () during which heating up is effected at a heating-up rate of more than 30&#xb0; K/min, in particular approximately 50&#xb0; K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace () is performed after this.

The invention relates to compositions based on Ce-stabilized ZrO, and single- and multi-colored blanks made from oxide ceramics, and a process for their preparation, in which oxide ceramic powder is coated with a coloring substance, the coated powders are preferably graded and at least one colored powder is filled into a compression mould, the colored powder or powders are compressed to produce a shaped body, and the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations. The compositions exhibit high fracture toughness and high flexural strength.

Shaded zirconia ceramics

The invention relates to compositions based on ZrO, and single- and multi-coloured blanks made from oxide ceramics, and a process for their preparation, in which

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Frastanz, Austria

Frank Rothbrust