Byk-chemie Gmbh

Sirona Dental Systems Gmbh

Akzo N.v.

Ulrich Orth

Karlheinz Haubennestel

Volker Wedler

Stefan Moessmer

Daniela Betcke

Heribert Holtkamp

Jürgen Omeis

Wolfgang Pritschins

Heinrich Hanisch

Joachim Pfeiffer

Bernd Göbelt

Sascha Schneider

Daniela Leutfeld

Marc Eberhardt

Udo Krappe

Reinhard Pieper

Jörg Issberner

Marcus Meichsner

Günter Saliger

Ulf Willers

Carl W Metzger

Karl-Heinz Freese

Jurgen Munch

Stefan Mössmer

Axel Woocker

Hartmut Hauefler

Frank Tlauka

Christoph Buchmann

Matthias Pickave

Matthias Pickavé

Tom Beckmann

Christian Dams

Steffen Teckentrup

Stefan Mößmer

A drill guide for creating a drilled implant hole for a dental implant, and a method for producing the drill guide. The drill guide includes a base part having at least one access opening and at least one sleeve. A first surface of the base part has an impression of a preparation site, and a second surface of the base part opposite the first surface has a support surface. The access opening expands from the second surface to the first surface of the base part. The access opening and the support surface are shaped in such a way that the sleeve can be inserted at least partially into the access opening, and the sleeve, when inserted, rests on the support surface and is positioned and oriented relative to the base part.

Drill guide for a dental implant and a method for fabricating a drill guide

The invention relates to a method for designing a plurality of adjacent tooth restorations using CAD/CAM technology. In a first step, the virtual model of a first tooth restoration at the first border of the restoration site is designed. In a second step, the virtual model of the second tooth restoration adjacent to the first tooth restoration is designed, the second tooth restoration being adjusted to match the first tooth restoration. The virtual model of the first tooth restoration is adjusted in relation to the second tooth restoration in a third step, if required. This procedure is then repeated for all of the other tooth restorations in the restoration site.

Method for designing a plurality of adjacent tooth restorations using CAD/CAM technology

Addition compound suitable as wetting and dispersing agent, obtainable from the reaction of

Polyether-modified epoxy amine adducts as wetting and dispersing agents

The invention relates to a method for producing a solution comprising urea urethanes and acting as a thixotropic agent, wherein at least two structurally different monohydroxy compounds are converted by an excess of toluoylene diisocyanate, forming monoisocyanate adducts having diamines in an ionic fluid, forming urea urethanes. The invention further relates to the use of the solution for thixotroping coating agents and solutions of urea urethanes in ionic fluids.

Method for producing rheologically effective urea urethanes in organic salts

In a method of processing a digitized workpiece (), especially a three-dimensional model of a dental prosthetic item to be produced therefrom, by altering the surface data of the workpiece by means of a tool which acts on a local zone of action () on the surface (), a change in height of said surface () is effected in said zone of action () of said tool when the tool is applied to said surface, the said zone of action of said tool covering a modified region () showing a substantially constant change in height (t) over the zone of action () and also a transition region (), in which the surface of the modified region () merges into the surface surrounding said zone of action ().

Method of processing a digitized workpiece, particularly a three-dimensional model of a dental prosthetic item to be produced therefrom, and apparatus therefor

Reaction products of polyepoxides with amines followed by reaction with polyalkyleneoxide modified and/or polyester-modified and/or polyether-polyester-modified isocyanates give comblike aminic polymers, and their salts. The compounds are useful as wetting and dispersing agents for organic and inorganic pigments, and as fillers for aqueous and solvent-borne systems.

Universal wetting agents and dispersants based on isocyanate monoadducts

A method for producing a dental prosthetic item, including providing a 3D model of the item. The providing includes determining an esthetically relevant designed subregion of a 3D model of the item as part of an exterior surface of the item. The subregion corresponds to a labial surface and/or incisor edge, or to a buccal and/or occlusal surface. Further steps include selecting a suitable blank, specifying a blank having a prefabricated esthetically relevant terminal subsurface of a surface of a tooth, a terminal subsurface of the blank being such as at least approximates the subregion. A further step includes forming the item from the selected blank such that a prefabricated terminal subsurface of the blank remains unmachined in at least a central region thereof. The forming includes machining the blank only in a marginal area of the terminal subsurface and on at least some surfaces outside of the terminal subsurface.

Blank and database of prefabricated partial surfaces of dental prosthetics

The present invention relates to comb (block) copolymers obtainable by reacting

Comb (block) copolymers

Disclosed is a method for designing tooth surfaces of a digital dental prosthetic item existing as a 3D data set using a first 3D model of a preparation site and/or of a dental prosthetic item and a second 3D model, which second model comprises regions which match some regions on the first 3D model and regions which differ from other regions of the first 3D model, the non-matching regions containing some of the surface information required for the dental prosthetic item, wherein at least three pairs (P, P, P) of points (P, P; P, P; P, P) corresponding to each other are selected on the matching region on the first 3D model (A) and the second 3D model (A'), that the positional correlation of the second 3D model with reference to the first 3D model is determined with reference to the at least three pairs (P, P, P), and that portions of the non-matching regions of the first and second 3D models are implemented for designing the tooth surface of the dental prosthetic item taking into consideration the positional correlation of these models relative to each other.

Dental CAD/CAM system for obtaining a position match of 3D data sets

The invention relates to a device for selecting an area () of a dental restoration body (), which is depicted in a 3D representation. At least portions of the area limit are provided in the form of dental-specific lines (). The aim of the invention is to carry out a dental construction of a restoration body with the aid of a CAD system, whereby certain areas of the restoration body can be selected and construction tools are provided for machining the selected area in a 3D representation. To this end, the area (), which is to be machined with a construction tool, can be determined by selecting dental-specific lines () or dental-specific points () or a preparation edge (). The method is used for assigning area limits to the selected area, said area limits being provided, at least in part, in the form of dental-specific lines ().

Device for selecting an area of a dental restoration body, which is depicted in a 3D representation, and method therefor

The invention relates to amide-containing polymers of the general formula (I)A-X&#x2014;CO&#x2014;(CH)&#x2014;NR&#x2014;R&#x2014;[Y&#x2014;R&#x2014;Y&#x2014;R)&#x2014;B&#x2003;&#x2003;(I)and also their salts with carboxylic acids, phosphoric esters and sulphonic acids. The invention further relates to processes for preparing the amide-containing polymers and to their use as rheology control agents.

Amide-containing polymers for rheology control

A method and apparatus for designing the surface of a dental prosthetic item consisting of three-dimensional data, wherein three-dimensional data of a surface () of an electronically stored tooth () are used at least as part of the surface of the dental prosthetic item to be fabricated, to which end the surface of the tooth () is first of all determined as to size and then placed against an electronically stored prosthetic item or the region of a preparation site () existing as three-dimensional data. The position of the digital tooth surface () over the dental prosthetic item or in the preparation site () can be set with regard to at least one spatial axis and/or at least one direction of rotation.

Method of designing the surface of a dental prosthetic item consisting of three dimensional data

Method for obtaining a position match of 3D data sets in a dental CAD/CAM system

Growing community of inventors

Wesel, Germany

Ulrich Orth