Abstract: Mixing elements for static mixer utilizing mixing low- to high-viscosity components are provided and comprise a planar central part extending along a longitudinal axis L and having front and rear faces, wherein arranged on the front and/or rear face are at least two flow-influencing elements that each surround at least one through-opening located in the central part and that are each in the form of prism lateral surfaces that are substantially perpendicular to the front and/or rear face, wherein pairs of the elements overlap or are connected to one another at a lateral edge. Static mixers comprising the mixing element and methods for mixing low- to high-viscosity components with the static mixers are also provided.

Abstract: Devices for the layer-by-layer generative production of at least one three-dimensional shaped part from at least two radiation-curable compositions are provided and comprise at least one radiation source and/or beam deflection device and at least one pressure trough with at least two process chambers openable at the top, wherein the at least two process chambers are arrangeable above the radiation source or a radiation deflection device, so that the curable compositions in the process chambers are exposable to radiation from below via the radiation source and/or the radiation deflection device. The devices further comprise a building platform having an underside which is exposable to rays from the radiation source, wherein the bottom of the pressure trough comprises at least partially a transparent material. Additionally, processes for producing at least one three-dimensional shaped part from at least two different curable compositions are provided.

Abstract: A polymerisable radiation-curable composition comprising: (i) monomers, comprising at least (a) a first monomer having a TG (glass-transition point) of the homopolymer of said first monomer ?120° C. and at least (b) a second monomer having a TG (glass-transition point) of the homopolymer of the second monomer ?100° C., wherein at least one of the at least one first monomer or of the at least one second monomer has an alicyclic group, and comprising (ii) at least one further component, comprising at least one photo-initiator for the UV and/or Vis spectral region or a photo-initiator system for the UV and/or Vis spectral region. Also disclosed is a blank in the form of a three-dimensional moulded body of a polymerised composition, in particular radiation-cured composition, for producing 3D moulded bodies, dental prosthetic parts, orthopaedic appliances or dental pre-forms in a rapid prototyping, rapid manufacturing, or rapid tooling method.

Abstract: The invention relates to a rotor shaft for a dynamic mixer, in particular a dental dynamic mixer, for mixing low to high viscous components, comprising a mixing area and a connection geometry adjoining the mixing area, the mixing area comprising a central shaft having a distal end and a proximal end abutting the connection geometry, and having at least one worm thread, in particular the rotor shaft has at least two mixing sections, a first mixing section comprising at least two mixing blades radially oriented on the surface of the central shaft and a second mixing section comprising at least one worm thread having spirally running thread flanks, the spirally running thread flanks peripherally entwining the surface of the central shaft. Furthermore, the invention relates to a dynamic mixer, in particular a dental dynamic mixer, comprising the rotor shaft, as well as its use for mixing low to high viscous components.

Abstract: The invention relates to a mixing capsule (1) comprising a housing in the form of a cylinder, characterised in that the mixing capsule has an applicator (2) at the top surface (15) of the cylinder and an auxiliary capsule (3) at the base surface of the cylinder being mounted displaceably in the direction of the longitudinal axis, the auxiliary capsule (3) being mounted displaceably in the direction of the longitudinal axis in a cylindrical inside pipe (4) and/or a mounting of the mixing capsule (1), the housing of the mixing capsule comprising an outer housing sleeve (5) and an inner housing sleeve (6) being mounted rotatably against each other and displaceably into each other, the auxiliary capsule (3) and the cylindrical inside pipe (4) and/or the mounting taking a first partial volume of the internal volume (9) of the mixing capsule (1) in a first position of the inner housing sleeve (6), the mixing capsule (1) having a second partial volume of the internal volume (9) being independent from the auxiliary c

Abstract: The invention relates to a retraction paste comprising a composition of i) 10 to 25% by weight at least one astringent compound, ii) 50 to 75% by weight fillers, iii) 10 to 35% by weight protic liquid, and iv) 0 to 10% by weight pigments, dye and/or rheology additive, ii) the fillers comprising kaolinite and mica in the ratio of 4:1 to 1.5:1 and, the total composition of components i) to iv) in the retraction paste amounting to 100% by weight, a method for producing the retraction paste, a kit comprising a container with the retraction paste for single or repeated use, as well as a retraction paste as an agent for haemostasis.

Abstract: Disclosed is a two-component mixing capsule for intake and for mixing of two compositions with a capsule housing having a discharge spout at its front end, wherein the mixing capsule comprises a first mixing chamber and a second mixing chamber, wherein the two mixing chambers may be separated from each other for storage or for transport, by the first mixing chamber being rotatable into a first position in which the first mixing chamber is separated from mixing chamber, by a rotatably mounted handhold element, the rotational axis of which is approximately perpendicularly arranged to the longitudinal axis of the mixing capsule. The two mixing chambers form a common mixing chamber by rotating the first mixing chamber into a second position in which the central axes of the first and second mixing chamber are substantially coaxially arranged, wherein the composition may be discharged after mixing by attaching a squeezing piston.

Abstract: A method for producing a guide rail having the steps of: (A) generating or providing a virtual 3D model of a dental prosthesis with at least one virtual model of a machined prosthetic tooth to be arranged in a prosthesis base; (B) calculating a volume to be removed from a prefabricated prosthetic tooth; (C) generating a virtual model of a guide rail which is fixed to a mount for fastening the prefabricated prosthetic tooth such that the guide rail enables guidance of a milling head and/or a cutting tool of known dimensions, in such a manner that the volume to be removed from the prefabricated prosthetic tooth is traversed with the milling head; and (D) producing a physical guide rail on the basis of the virtual model of the guide rail using a CAM method. Also disclosed are an apparatus for implementing the method, a method for basally shortening prosthetic teeth, and a method for producing a dental prosthesis with such a method for producing a guide rail.

Abstract: The invention relates to a container (30), in particular a bottle (30), for storing and optionally applying a liquid, solvent-containing compositions, having a multi-layer wall (20) comprising at least one side wall of the bottle, the bottom of the bottle and optionally a discharge region at the opening of the bottle, the multi-layer wall (20) comprising at least an inner layer (21), a barrier layer (22) and an outer layer (23), the barrier layer (22) being adapted to form a barrier for oxygen and/or water vapour, the inner layer (21) and/or the outer layer (23) having a microcellular structure (24), the microcellular structure (24) having fluid bubbles (25), and the fluid bubbles (25) being product of a physically and/or chemically introduced blowing agent.

Abstract: The disclosure relates to a two-component mixing capsule for intake and for mixing of two compositions with a capsule housing having a discharge spout at its front end, wherein the mixing capsule comprises a first mixing chamber and a second mixing chamber, wherein the two mixing chambers may be separated from each other for storage or for transport, by the first mixing chamber being rotatable into a first position in which the first mixing chamber is separated from mixing chamber, by a rotatably mounted handhold element, the rotational axis of which is approximately perpendicularly arranged to the longitudinal axis of the mixing capsule. The two mixing chambers form a common mixing chamber by rotating the first mixing chamber into a second position in which the central axes of the first and second mixing chamber are substantially coaxially arranged, wherein the composition may be discharged after mixing by attaching a squeezing piston.

Abstract: The invention relates to a method for producing a component (9) by means of stereolithography, having the steps of: A) generating a component (9) in accordance with a virtual 3D model of the component (9) by curing a liquid plastic (7) using stereolithography, and B) cleaning the component (9) through at least one rotational movement of the component (9) about an axis of rotation or about multiple axes of rotation, wherein residues of the liquid plastic (7) are removed from the surface of the component (9) by a centrifugal force resulting from the rotational movement. The invention also relates to a 3D printing system for implementing such a method.

Abstract: A polymerizable adhesive composition containing an olefinically functionalized carbohydrate, a polymerizable liquid monomer, and optionally at least one polymerization initiator or initiator system is described. The adhesive composition is particularly well suited for adhering plastic components as well as is preferably provided with sufficiently long processing time for adhering artificial teeth on denture bases. The viscosity of the adhesive composition may be adjusted to the respected processing conditions.

Abstract: The subject matter of the invention is an autopolymerisable 2-component prosthetic base material, a kit containing the material as well as a method for its production comprising at least one liquid monomer component (A), and at least one powdered component (B), wherein the prosthetic material in component (A) besides methylmethacrylate contains at least one N-alkyl-substituted acryloyloxy carbamate having a molecular mass of less than or equal to 250 g/mol, optionally at least one at least di-functional urethane (meth)acrylate, a di-, tri-, tetra- or multi-functional monomer not being urethane (meth)acrylate, and optionally polymeric particles having a primary particle size of less than 800 nm, and the powdered component (B) comprises polymeric particles having at least three different particle size fractions, and both (A) and (B) contains at least one initiator or at least one component of an initiator system for autopolymerisation.

Abstract: A polymerisable dental composite material comprising (i) 60 to 85% by weight of an inorganic filler component comprising at least one tectosilicate and optionally at least one dental glass and/or at least one amorphous metal oxide, (ii) 10 to 40% by weight of a mixture of at least two different urethane(meth)acrylates, (iii) 0.01 to 5% by weight of at least one di-, tri-, tetra- or multi-functional monomer not being a urethane(meth)acrylate, (iv) 0.01 to 10% by weight of at least one initiator, an initiator system and optionally at least one stabiliser and optionally at least one pigment, wherein the total composition of the composite material amounts to 100% by weight, and a polymerised composite material having a flexural strength of greater than or equal to 240 MPa and an elastic modulus of 16 to 20 GPa for the production of indirect dentures.

Abstract: The present invention relates to a dynamic mixer, in particular for dental materials having different viscosity. Furthermore, the invention relates to a method for producing a dynamic mixer, in particular for dental materials of different viscosity.

Abstract: The invention relates to a method (100) for congruent alignment of a first polygonal multi-edge geometry (2) of a rotor shaft (3) of a dynamic mixer (4) with a second polygonal multi-edge geometry (5) of a drive shaft (6) of a motor (7) of a mixing apparatus (8), and optionally insertion of the second polygonal multi-edge geometry (5) of the drive shaft (6) of the motor (7) of the mixing apparatus (8) into or onto the first polygonal multi-edge geometry (2) of the rotor shaft (3) of the dynamic mixer (4), as well as a dynamic mixer for use in the method as also use of the mixer in the method.

Abstract: The invention relates to a two-component mixing capsule (1) for intake and for mixing of two, preferably powdered or preferably pasty or kneadable, particularly preferably dental, compositions with a capsule housing (2) having a discharge opening (3) at its front end (2.1), wherein the mixing capsule (1) comprises a first mixing chamber (5a) and a second mixing chamber (5b), wherein the two mixing chambers may be separated from each other for storage or for transport, by the first mixing chamber (5a) being rotated by a rotatably mounted handhold element whose rotation axis (Y) is approximately perpendicularly arranged to the longitudinal axis (Z) of the mixing capsule (1) into a first position in which the first mixing chamber (5a) is separated from mixing chamber (5b), preferably the central axes of the mixing chambers are arranged to each other by approximately 90°.

Abstract: A polymerisable radiation-curable composition comprising: (i) monomers, comprising at least (a) a first monomer having a TG (glass-transition point) of the homopolymer of said first monomer ?120° C. and at least (b) a second monomer having a TG (glass-transition point) of the homopolymer of the second monomer ?100° C., wherein at least one of the at least one first monomer or of the at least one second monomer has an alicyclic group, and comprising (ii) at least one further component, comprising at least one photo-initiator for the UV and/or Vis spectral region or a photo-initiator system for the UV and/or Vis spectral region. Also disclosed is a blank in the form of a three-dimensional moulded body of a polymerised composition, in particular a radiation-cured composition, for producing 3D moulded bodies, dental prosthetic parts, orthopaedic appliances or dental pre-forms in a rapid prototyping, rapid manufacturing, or rapid tooling method.

Abstract: A polymerisable radiation-curable, in particular UV-Vis-, UV- or Vis-curable, composition comprising: (i) monomers, wherein the monomers comprise: (a.1) at least one triacrylate derived from 1,3,5-tris(?-hydroxyalkyl) isocyanurate, wherein the hydroxyalkyl residue comprises 1 to 8 C-atoms and may be linear, branched and/or cyclic, and (a.2) at least one di-functional monomer, not being a urethane (meth)acrylate, and (ii) at least one further component, comprising: at least one photo-initiator for the UV and/or Vis spectral region or a photo-initiator system for the UV and/or Vis spectral region.

Abstract: Provided are adhesive monomers for dental materials including compounds represented by the general formula (1) below, in which the core (X) and the terminal group (Y1) are bonded to each other directly or via the linking group (Z): X(Y1)n1a(Z—Y1)n1b(1) wherein n1a represents the number of terminal groups (Y1) directly bonded to the core (X), n1b represents the number of terminal groups (Y1) bonded to the core (X) via the linking group (Z), and the sum of n1a and n1b is equal to the valence of the core (X); the core (X), the linking group (Z) and the terminal group (Y1) are further defined. The adhesive monomers can enhance adhesive strength to the tooth in dental treatment, and impart high mechanical strength to cured products.