Abstract: The invention relates to a polymerisable dental composite material comprising (i) 40 to 90% by weight of an inorganic filler component comprising at least one dental glass, as well as optionally at least one an amorphous metal oxide, (ii) 10 to 60% by weight of at least one urethane (alkyl) acrylate of the idealised formula I, (iii) 0.01 to 15% by weight of at least one di-, tri-, tetra- or multi-functional monomer not being a urethane (alkyl) acrylate, (iv) 0.01 to 10% by weight of at least one initiator, of an initiator system, as well as optionally of at least one stabiliser, and optionally of at least one pigment, the total composition of the composite material amounting to 100% by weight, as well as to a polymerised composite material for producing direct dental restorations or indirect dental restorations.

Abstract: There is provided a curable composition preparation kit, including: a first agent containing a first monomer; and a second agent containing a second monomer, in which at least one of the first agent or the second agent each independently contains an ascorbic acid-type compound and a compound A containing at least one of an alkoxysilyl group or a hydroxysilyl group.

Abstract: The invention relates to a method for packaging dental components, comprising the method steps: producing or providing a dental component; arranging the dental component with a support side on a support surface of a three-dimensional carrier element, the dental component projecting beyond the edge of the support surface on at least one side, forming a peripheral area; providing a sheet-like semi-finished plastic product comprising a thermoplastic resin; forming the sheet-like plastic semi-finished product in a thermoforming process for form closure of the dental component in a plastic structure, such that the dental component is positively surrounded by the plastic structure in the peripheral area on the support side of the dental component; and separating the dental component partially surrounded by the plastic structure from the carrier element to obtain a packaging system comprising the dental component packaged in the plastic structure.

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: 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: 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: Polymerizable, radiation-curable compositions are provided and comprise (i) monomers and (ii) at least one further component, wherein the (i) monomers comprise (a) at least one urethane (meth)acrylate that is at least difunctional, (b) at least one monofunctional acrylate having an alicyclic group and/or at least one monofunctional methacrylate having an alicyclic group, and (ii) the at least one further component comprises (c) at least one photoinitiator for the UV and/or visible range or a photoinitiator system for the UV and/or visible range. The compositions are usable for producing, via a rapid prototyping, manufacturing, or tooling process, dental prosthetic parts, orthopaedic instruments, or dental pre-forms that have a flexural strength of greater than or equal to 75 MPa, a modulus of elasticity of greater than or equal to 2600 MPa, and/or a water absorption of less than 45 [?g/mm3].

Abstract: The invention relates to a polymerisable composition comprising (i) 0 to 90% by weight of at least one inorganic filler component, (ii) 5 to 99.98% by weight of at least one urethane (alkyl) acrylate of the idealised formula I, (iii) 0.01 to 25% by weight of at least one di-, tri-, tetra-or multi-functional monomer, not being a urethane (alkyl) acrylate, (iv) 0.01 to 10% by weight of at least one initiator, of an initiator system as well as optionally of at least one stabiliser and optionally of at least one pigment, the total composition of the composition amounting to 100% by weight, as well as a polymerised composition having improved fracture toughness.

Abstract: An object of the invention is a polymerizable composition comprising. 0.01 to 90 wt.-% of at least one inorganic filler component, 5 to 99.97 wt.-% comprising at least two urethane acrylates, wherein one urethane acrylate corresponding to formula I and the second urethane acrylate having at least one bifunctional thiolurethane group and at least one olefinic group, and mixtures of urethane acrylates comprising these, 0.01 to 25 wt.-% of at least one di-, tri-, tetra- or multi-functional monomer having at least one ether group, thioether group, an at least tri-functional triester and/or a di-functional diester, the diester being selected from tricyclodecanedimethanol dimethacrylate and tricyclodecanedimethanol diacrylate or mixtures of these di-, tri-, tetra- or multi-functional monomers, 0.01 to 10 wt.-% of at least one initiator, an initiator system, and optionally at least one stabilizer and optionally at least one pigment, wherein the total composition of the polymerizable composition is 100 wt.-%.

Abstract: The object of the invention is a thermoplastic composition comprising A) 5 to 5000 parts by weight of poly(dialkylphenylene) ether with alkyl comprising 1 to 6 carbon atoms, B) 100 parts by weight of thermoplastic styrene polymer, C) 0.001 to 1500 parts by weight of core-shell particles, wherein the shell of the core-shell particles comprises thermoplastic polymers, in particular thermoplastic acrylate-based polymers comprising homo- and copolymers, and the core comprises elastomers, in particular elastic polymers comprising homo- and copolymers or mixtures of polymers, whose TG is below 0° C., and D) 0 to 2550 parts by weight of inorganic filler.

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: Self-adhesive, radiation-curable fissure sealants and methods comprise a white pigment, A) a monomer component comprising a) at least one difunctional urethane (meth)acrylate, b) at least one hydrophilic alkylene oxide-based difunctional (meth)acrylate-based crosslinker, c) a mixture of acidic monomers of an olefinic carboxylic acid and/or of an olefinic carboxylic anhydride in combination with an olefinic acidic monoester of a phosphoric acid and/or an olefinic acidic monoester of a thiophosphoric acid, and d) an initiator and/or an initiator system, each having an absorption maximum of 420 to 550 nm, optionally with a co-initiator, and B) a filler component comprising at least one dental glass, wherein A) the monomer component and B) the filler component are present in a mass ratio of 60:40 to 100:0 in the fissure sealant, and wherein the total composition of the fissure sealant comprises 100 wt.-%.

Abstract: Mixing capsules and methods are provide and comprise a first chamber to receive a composition A and a second chamber to receive a composition B, wherein the first chamber and the second chamber are arranged rotatably about the longitudinal axis of the mixing capsule, the first chamber comprising a first opening, the second chamber comprising a second opening, the first opening and the second opening being arranged perpendicularly to the longitudinal axis and plan-parallelly to each other and/or perpendicularly spaced, the first opening and the second opening being arranged incongruently to each other in a storage position, the first opening and the second opening being arranged congruently to each other in a handling position.

Abstract: A polymerisable, radiation curable composition comprising (i) monomers comprising: (a) at least one acrylic acid ester having an additional carboxy group, acrylic acid ester having at least one additional anhydride group of carboxy groups, and/or derivative of the afore-mentioned acrylic acid esters, (b) at least one di-functional acrylate having a bivalent alicyclic group and/or at least one di-functional methacrylate having a bivalent alicyclic group, and (c) optionally, at least one disubstituted 4,4?-di(oxabenzene) dialkyl methane of formula I, and (ii) at least one further component comprising: (d) at least one photoinitiator for the UV and/or Vis spectral region or a photoinitiator system. The composition is suitable for producing dental prosthetic parts, orthopaedic appliances or dental pre-forms, having a) a flexural strength 50 MPa, b) an E-modulus ?1500 MPa, c) a bending fracture ?1.1 MPa m1/2, and/or d) a fracture work >250 J/m2 DIN EN ISO 20795-2.

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.

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: 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: Dynamic mixers and methods have a chamber part with a discharge opening, a mixing chamber, a closing part, first and second inlet openings, and a centrical opening. The chamber and closing parts mount against each other in a rotationally symmetric manner and the closing part has substantially parallel planes, wherein a first plane averts a rotor, a second plane faces the rotor, a first inlet opening and a passage opening form a linear duct, and the substantially parallel planes form a feeding duct. Dimensions of the feeding duct are variable depending on a relative rotationally symmetric position of the chamber and closing parts, wherein the dimensions include a length, a width and/or height, and a partial circle is formable by the feeding duct and may enclose an angle of 20-170 degrees depending on the relative rotationally symmetric position of the chamber and closing parts.

Abstract: Self-adhesive, radiation-curable fissure sealants and methods comprise a white pigment, A) a monomer component comprising a) at least one difunctional urethane (meth)acrylate, b) at least one hydrophilic alkylene oxide-based difunctional (meth)acrylate-based crosslinker, c) a mixture of acidic monomers of an olefinic carboxylic acid and/or of an olefinic carboxylic anhydride in combination with an olefinic acidic monoester of a phosphoric acid and/or an olefinic acidic monoester of a thiophosphoric acid, and d) an initiator and/or an initiator system, each having an absorption maximum of 420 to 550 nm, optionally with a co-initiator, and B) a filler component comprising at least one dental glass, wherein A) the monomer component and B) the filler component are present in a mass ratio of 60:40 to 100:0 in the fissure sealant, and wherein the total composition of the fissure sealant comprises 100 wt.-%.

Abstract: A self-adhesive, radiation-curable, dental material comprising A) a monomer component comprising a difunctional urethane (meth)acrylate, hydrophilic alkylene oxide-based di-functional (meth)acrylate-based crosslinkers, at least one acidic monomer of an olefinic acidic monoester of a phosphoric acid and/or an olefinic acidic monoester of a thiophosphoric acid optionally in combination with an olefinic carboxylic acid and/or olefinic carboxylic acid anhydrides and an initiator and/or an initiator system having an absorption maximum of from 420 to 550 nm and optionally having a co-initiator and optionally B) a filler component comprising at least one dental glass, wherein in particular A) the monomer component and B) the filler component are present in a mass ratio of a) 100:0 to 60:40 in fissure sealants or b) from 59:41 to 20:80 in composite materials, and wherein the total composition of the fissure sealant or composite material comprises 100 wt.- %.