Abstract: 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.

Abstract: 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.

Abstract: Addition compound suitable as wetting and dispersing agent, obtainable from the reaction of A) polyepoxides with B) at least one primary polyoxyalkyleneamine C) at least one other aliphatic and/or araliphatic primary amine and D) at least one modified isocyanate.

Abstract: 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.

Abstract: In a method of processing a digitized workpiece (1), 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 (3) on the surface (2), a change in height of said surface (2) is effected in said zone of action (3) of said tool when the tool is applied to said surface, the said zone of action of said tool covering a modified region (5) showing a substantially constant change in height (t) over the zone of action (3) and also a transition region (4), in which the surface of the modified region (5) merges into the surface surrounding said zone of action (3).

Abstract: 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.

Abstract: The invention relates to a drilling jig (1) for carrying out implant drilling (6, 7, 8) for a dental implant and to a method for producing said drilling jig, comprising a base part (2) having at least one passage opening (19, 20, 21) and comprising at least one sleeve (3, 4, 5). A first surface (9) of the base part (2) has an impression (10) of a preparation point, wherein a second opposite surface (15) of the base part has a bearing surface (16, 17, 18). The passage opening (19, 20, 21) is expanded proceeding from the second surface (15) to the first surface (9) of the base part (2), wherein the passage opening (19, 20, 21) and the bearing surface (16, 17, 18) of the base part (2) are shaped in such a way that the sleeve (3, 4, 5) can be inserted at least partially into the passage opening (19, 20, 21) and the sleeve (3, 4, 5) rests on the bearing surface (16, 17, 18) in an inserted state and is positioned in the position and orientation thereof relative to the base part (2).

Abstract: 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.

Abstract: Addition compound suitable as wetting and dispersing agent, obtainable from the reaction of A) polyepoxides with B) at least one primary polyoxyalkyleneamine C) at least one other aliphatic and/or araliphatic primary amine and D) at least one modified isocyanate.

Abstract: A burner for a turbine has a flame tube, a casing enclosing the flame tube forming an oxidant collection chamber, a burner bottom which bounds the oxidant collection chamber and the combustion space, and a swirler which has a plurality of guide vanes arranged so that the distances between the guide vanes form a plurality of radial inlet passages to the combustion space. A fuel supply pipe is provided in the inlet flow region of at least some of the inlet passages, which fuel supply pipe extends lengthwise through the respective inlet passage in an axial direction of the burner and traverse to an oxidant flow direction, and wherein each fuel supply pipe has in its wall at least one radial fuel output opening by which fuel can be mixed into the respective inlet passage with a directional component extending transverse to the oxidant flow direction.

Abstract: The present invention relates to a method for the production of addition compounds by converting an epoxide component (A) comprising at least two epoxide functions with at least one amine component (B) comprising a primary amine function in a continuous operation in a reactor, with the epoxide component (A) and the amine component (B) being continuously supplied in a molar ratio from 5:1 to 1:50 such that in the reactor a reaction mixture product develops comprising the epoxide component (A) and the amine component (B), as well as the conversion products from the epoxide component (A) and the amine component (B), which is drained from the reactor in the form of a product flow, with 10-100 mol % of the epoxy functions introduced into the reactor via the epoxide component (A) being converted in the reactor. The addition compounds yielded are preferably used as cross-linking and dispersing agents.

Abstract: A method for designing tooth surfaces of a digital dental prosthetic item using a first 3D model of a preparation site and/or of a dental prosthetic item and a second 3D model. The second model comprises regions matching some regions on the first 3D model and regions differing from other regions of the first 3D model. The non-matching regions contain surface information. At least three pairs of corresponding points are selected on the matching region on the first 3D model and second 3D model. The positional correlation of the second 3D model with reference to the first 3D model is determined based on the at least three pairs, and portions of the non-matching regions of the first and second 3D models are implemented for designing the tooth surface prosthetic item taking into consideration the based on the positional correlation of these models relative to each other.

Abstract: The present invention relates to comb (block) copolymers obtainable by reacting I at least one (block) copolymer comprising polymerized, optionally substituted styrene and maleic anhydride units, which copolymer has been obtained by living, free-radical polymerization, with II at least one polyalkylene oxide monoamine comprising a primary amino end group at a reaction temperature of ?150° C. and by subsequent salification of at least 25 mol % of the free carboxyl groups of the reaction product at a reaction temperature of <100° C. and optionally after addition of H2O and to the use of these comb copolymers as wetting agents and dispersants.

Abstract: 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 (P1, P2, P3) of points (P11, P12; P21, P22; P31, P32) 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 (P1, P2, P3), 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 consideratio

Abstract: The invention relates to a device for selecting an area (2; 22; 32; 42; 52; 62; 72; 82) of a dental restoration body (1;71), which is depicted in a 3D representation. At least portions of the area limit are provided in the form of dental-specific lines (5, 6, 8). 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 (2; 22; 32; 42; 52; 62; 72; 82), which is to be machined with a construction tool, can be determined by selecting dental-specific lines (5, 6, 8) or dental-specific points (7.1 7.4) or a preparation edge (4). 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 (5, 6, 8).

Abstract: 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.

Abstract: In a method of processing a digitized workpiece (1), 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 (3) on the surface (2), a change in height of said surface (2) is effected in said zone of action (3) of said tool when the tool is applied to said surface, the said zone of action of said tool covering a modified region (5) showing a substantially constant change in height (t) over the zone of action (3) and also a transition region (4), in which the surface of the modified region (5) merges into the surface surrounding said zone of action (3).

Abstract: In a method of processing a digitized workpiece (1), 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 (3) on the surface (2), a change in height of said surface (2) is effected in said zone of action (3) of said tool when the tool is applied to said surface, the said zone of action of said tool covering a modified region (5) showing a substantially constant change in height (t) over the zone of action (3) and also a transition region (4), in which the surface of the modified region (5) merges into the surface surrounding said zone of action (3).

Abstract: 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 (P1, P2, P3) of points (P11, P12; P21, P22; P31, P32) 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 (P1, P2, P3), 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 consideratio

Abstract: The invention relates to amide-containing polymers of the general formula (I) A-X—CO—(CH2)2—NR1—R2—[Y—R3—Y—R4)a—B??(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.