A milling blank for producing medical-technical molded parts made from a material produced from at least two components, wherein a first component A comprises a poly(alkyl methacrylate) polymer, and wherein a second component B comprises at least one alkyl acrylate monomere and/or one alkyl methacrylate monomer, in which the poly(alkyl methacrylate) polymer of component A is at least partially soluble, wherein the material comprises a flexibilizer as a further component, wherein the flexibilizer is selected from the group of citric-acid-based, adipic-acid-based, phthalic-acid-based or aliphatic esters.

Dental composition comprising (a) at least two di- or polyepoxides having 2 to 5 epoxide groups and having a molecular weight of from 200 to 700 Da, or a macromonomeric reaction product obtainable by reacting the diepoxide with a dicarboxylic acid in a molar ratio [diepoxide]/[dicarboxylic acid] of at least 2; (b) one or more primary monoamines and/or disecondary diamines; (c) optionally one or more aliphatic polyamines; (d) a particulate filler, wherein the molar ratio of epoxide groups in component (a) to the NH bonds in component (b) and (c) [epoxide.sub.(a)]/[NH.sub.(b),(c)] is in the range of from 0.9 to 1.1; wherein the di- or polyepoxide having 2 to 5 epoxide groups is a compound of the following formula (I):
A(BZ.sub.m).sub.n(I) wherein A represents an n-valent organic moiety optionally having 1 to 10 heteroatoms selected from oxygen atoms and sulfur atoms; and B represents an m+1-valent organic moiety, Z is an epoxide group which may have a substituent, m which are independent from each other represent an integer of at least 1; and n is an integer of from 1 to 5; wherein the m are selected so that 2 to 5 epoxide groups are present; wherein the composition does not contain any 2,2-bis-(4-hydroxyphenyl)-propane, or 2,2-bis-(4-hydroxyphenyl)-methane.

A separating membrane for dental surgeries and a method for manufacturing the same are provided. The separating membrane has biodegradability, and includes a biodegradable porous base layer and a hydrophilic substance. The hydrophilic substance is bonded to the biodegradable porous base layer, and is selected from the group consisting of hyaluronic acid, derivatives of the hyaluronic acid, and water-soluble vitamins. An outer surface of the separating membrane has a water contact angle of less than 80.

A separating membrane for dental surgeries and a method for manufacturing the same are provided. The separating membrane has biodegradability, and includes a biodegradable porous base layer and a hydrophilic substance. The hydrophilic substance is bonded to the biodegradable porous base layer, and is selected from the group consisting of hyaluronic acid, derivatives of the hyaluronic acid, and water-soluble vitamins. An outer surface of the separating membrane has a water contact angle of less than 80.

The invention relates to a dental retraction composition comprising guanidinyl-containing polymer, carrageenan, filler, paste-forming component, organic acid having a molecular weight of 80 to 250 g/mol, a pks value of 2 to 5, 1 to 3 carboxylic acid moieties, and being soluble in polyethylene glycol with a molecular weight of 400 g/mol, the dental retraction composition not containing water in an amount of more than 5 wt. %, and not containing aluminium chloride in an amount of more than 0.5 wt. %, wt. % with respect to the weight of the dental retraction composition. The dental retraction composition is for use in a process for use in a process of retracting dental tissue in combination with coagulating blood. The invention also relates to a delivery device comprising the dental retraction composition and a kit of parts comprising the delivery device, an applier for the delivery device, optionally a dental impression material, and optionally a retraction cap.

The invention relates to a dental retraction composition comprising guanidinyl-containing polymer, carrageenan, filler, paste-forming component, organic acid having a molecular weight of 80 to 250 g/mol, a pks value of 2 to 5, 1 to 3 carboxylic acid moieties, and being soluble in polyethylene glycol with a molecular weight of 400 g/mol, the dental retraction composition not containing water in an amount of more than 5 wt. %, and not containing aluminium chloride in an amount of more than 0.5 wt. %, wt. % with respect to the weight of the dental retraction composition. The dental retraction composition is for use in a process for use in a process of retracting dental tissue in combination with coagulating blood. The invention also relates to a delivery device comprising the dental retraction composition and a kit of parts comprising the delivery device, an applier for the delivery device, optionally a dental impression material, and optionally a retraction cap.

Modelling material which contains (a) at least one radically polymerizable monomer, (b) at least one initiator for the radical polymerization and (c) at least one inert component. The inert component (c) is selected from phthalates, polyethylene glycols (PEG), polypropylene glycols (PPG), PEG-PPG copolymers, glycerol derivatives, ethoxylated or propoxylated glycerol, ethylenediamine tetrakispropoxylates and ethylenediamine tetrakisethoxylates. The material is suitable in particular for the production of models of dental restorations for investment casting processes.

The invention relates to a powder for use in treating tooth surfaces with a powder jet device, wherein the powder comprises at least one organic compound, wherein the at least one organic compound has a melting point <165 C. and a solubility in water at 25 C. of <10 g/l.

The invention relates to a powder for use in treating tooth surfaces with a powder jet device, wherein the powder comprises at least one organic compound, wherein the at least one organic compound has a melting point <165 C. and a solubility in water at 25 C. of <10 g/l.

The present invention relates to a dental composition which is a resin modified dental cement composition, comprising a radically polymerizable compound and a redox initiator system comprising one or more clathrate compounds comprising a host molecule and one or more guest molecules, wherein the guest molecule is an oxidising agent selected from organic peroxides and organic hydroperoxides. Furthermore, the present invention relates to a use of the redox initiator system in a dental composition which is a resin modified dental cement composition.