Ivoclar Vivadent Ag

University of Münster

Jörg Ebert

Jürgen Stampfl

Rudolf Jussel

Wolfgang Josef Wachter

Walter Pokorny

Michael Brotzge

Johannes Lorünser

Lorenz Josef Bonderer

Robert Gmeiner

Jürgen Rudolf Laubersheimer

Johannes Patzer

Marius Aster

Stefan Geissbühler

Pascal Scherrer

Johannes Homa

Volker Rheinberger

Norbert Moszner

Gottfried Rohner

Robert Grünenfelder

Christian Frei

Nadja Cavegn

Alexander Schöch

Theresa Sujata Maria Senti

Oliver Voigt

Tobias Specht

Dieter Voser

Gerald Mitteramskogler

Simon Gruber

Julia Anna Schönherr

Joachim Reissner

Robert Grunenfelder

Julia Anna SCHÖNHERR

Robert Gründenfelder

Johannes Benedikt

A manufacturing method for a dental object () including the steps of generating a dendritic base structure () on a build platform () and building the dental object () on the dendritic base structure () by a three-dimensional printing method.

Manufacturing method for a dental object

A method of producing a dental object (), including the steps of producing a pillared support structure () on the dental object (); and producing a lattice structure () for reinforcing the support structure ().

Method of producing a dental object

A process control method for a 3D-printing process using a 3D printer. The 3D printer has a build platform, a light source, a receiving device for printing material and a control device by which an object can be produced layer-wise or continuously from the printing material. The method includes using a thermal imaging camera, the output signal of which is transmitted to the control device, connected to the 3D printer, The method includes the following steps:

Process control method for a 3D-printing process

The present invention relates to a method and device for layer-wise instruction of a shaped body by stereolithography in subsequent layers.

Device for layer-wise construction of a shaped body by stereolithographic solidification of photopolymerizable material

The invention relates to a plausibility checking method for rapid prototyping devices, in particular for stereolithography devices. In this connection, input data () is checked which is present particularly in the form of graphics data and of which every file renders a layer. Every layer comprises a plurality of pixels. The component to be printed in the respective layer is produced based on output data by the rapid prototyping device. The input data of two consecutive layers is checked and the sum of all pixels to be exposed is determined for every layer. A signal () is output in particular as a warning signal () when the pixel sum of a following layer is larger than in the previous layer by a predetermined factor.

Plausibility checking method for additive manufacturing methods

The present invention relates to a method for producing shaped bodies () from a building material, in which a layered structure of a shaped body () takes place by successively solidifying layers of the building material by exposure to electromagnetic radiation in a layer area having a contour specified for the respective layer. The method provides that together with the shaped body (), a sleeve-like frame () surrounding the shaped body at a distance is constructed layer by layer from the building material, and that in addition, a plurality of pin-like connections () are constructed integral with the frame () and the shaped body (), which are distributed around the shaped body () and which connect the shaped body () with the frame ().

Method for the additive manufacture of shaped bodies

A stereolithography apparatus having a build platform and a tray, into which the build platform can be immersed, wherein at the bottom in or on the tray a light-transmissive film is formed or arranged and is elastically deformable, having a light source or energy source underneath the film, the tray can be filled with flowable printing material, a control apparatus controls the movement of the build platform relative to the film and the control apparatus superimposes, during the substantially vertical release movement between a slice of a structure, produced by stereolithography, on the build platform from the film, upon the release movement a substantially horizontal, in particular translational, transverse movement which transverse movement extends at an angle between 60 and 120&#xb0; relative to the release movement and has alternating, in particular reciprocating, movement directions.

Stereolithography apparatus with periodic, transverse movement with an amplitude of .8 to 15 millimeters

Method for layer-wise construction of a shaped body by stereolithographic solidification of photopolymerizable material

The invention relates to a single- or multi-unit dental restoration, which consists of a support structure and a veneer, which support structure is in particular made from oxide ceramics by means of additive manufacturing, particularly preferably by means of rapid prototyping, wherein the veneer is produced by pressing a ceramic material, such as a glass ceramic or composite material, which is more translucent than the support structure, characterized in that the veneer fills and/or penetrates recesses of the support structure () configured as a net or frame structure or as a reinforcement, wherein it is particularly provided that the recesses penetrate through the support structure ().

Single- or multi-unit dental restoration, and method of producing the same

The invention shows a material provision device for a stereolithography apparatus to provide print material (), in particular a photopolymer, to be cured, wherein the material provision device () surrounds an in particular limp material cartridge () which receives the print material () on all sides and (UV) light-proof, and the material cartridge () comprises an outlet () via which the print material () may be dispensed and which is received in a connection () or a spout in the material provision device () and is at least partially supported thereon or therein or seals against it.

Material provision device for a stereolithography apparatus

In a stereolithography apparatus a material provision device for print material () to be cured, in particular a photopolymer, is provided. The material provision device () receives a material cartridge () which in turn receives the print material () and surrounds it on all sides. The material cartridge () may be connected to an outlet valve unit () in a liquid-proof manner via which the print material () may be output and which is received at least partially in the material provision device () and which is supported at least partially thereon or therein or sealed against it. The outlet valve unit () comprises a valve () which is opened and closed depending on the relative position, in particular the swiveling position, of material provision device () and stereolithography apparatus.

Stereolithography apparatus material provision device

Methods for manufacturing a dental restoration for a patient and dental ceramics production devices are disclosed. A dental restoration may be designed based on a scan of the patient's mouth, using a CAD software module. The software module may produce conveyor channels for a positive model based on the dimensions of a muffle in relation to the size and shape of the positive model. The conveyor channels may extend at an angle of between 0&#xb0; and 130&#xb0; away from an axis of the pressing channel, the axis being located essentially along an isotherm inside the muffle. A docking site may be selected based on a position with the greatest wall thickness of the positive model. The present disclosure allows the creation of a high-quality dental restoration in a very efficient fashion, in particular when lithium disilicate is used as the dental ceramics material.

Process and device for manufacturing a dental restoration

A stereolithography device having a trough () for accommodating free-flowing, photopolymerizable material, a construction platform () suspended above the trough bottom on a lifting unit (), and having a heating unit for heating the photopolymerizable material in the trough. The heating unit has a transparent, electrically conductive layer (), which covers the entire area of at least the exposure region above the trough bottom, and which is provided outside the exposure region on opposing sides of the layer with electrical contacts () extended over the opposing sides, which are connected to a controlled electrical supplier to enable heating of the entire area of photopolymerizable material above the trough bottom in the exposure region by current flow through the layer.

Stereolithography device having a heating unit

Growing community of inventors

Buchs, Switzerland

Jörg Ebert