THREE-DIMENSIONAL FABRICATING MATERIAL SYSTEMS FOR PRODUCING DENTAL PRODUCTS Russian patent published in 2019 - IPC A61K6/83 A61C13/00 

FIELD: medicine.

SUBSTANCE: group of inventions relates to a printable and polymerisable resin for producing a dental prosthesis and a method for producing a dental prosthesis using same. Printable resin for producing a dental prosthesis includes a composition that contains from 1 to 9 wt. % oligomer based on the product of reacting hydroxyethyl methacrylate and an intermediate product with terminal isocyanate groups, obtained from trimethyl-1,6-diisocyanatohexane and bisphenol-A propoxylate in the presence of dibutyl tin dilaurate, from 40 to 48 wt. % methyl methacrylate (MMA); from 2 to 10 wt. % polymethyl methacrylate (PMMA); from 5 to 10 wt. % of various mono- and polyfunctional(meth)acrylates; from 40 to 45 wt. % of at least one inorganic filler or composite filler; from 2 to 10 wt. % of an impact modifier with a core / cladding structure, having a core containing a silicone-acrylic-based rubber component or a butadiene-based rubber component, and cladding that contains at least one thermoplastic selected from the group consisting of polycarbonate, polystyrene, polypropylene, polyethylene terephthalate, polyvinyl chloride, polyamide, polybutylene terephthalate, acrylonitrile-butadiene-styrene resin, polymethyl methacrylate, and any combinations thereof; from 1 to 9 wt. % of pigments and from 0.01 to 9 wt. % of photoinitiators, per 100 wt. % of the composition. Methods for making a dental prosthesis include loading said polymerisable resin in liquid form into a resin bath of a 3D printer, where the 3D printer is a 3D stereolithography printer or a 3D digital light processor (DLP) printer. In the case of using a DLP method, 3D objects are created by projecting successive planes of spatial image elements into a specified liquid or heated resin to form a first layer of substance that polymerises into a solid. Successive layers of the substance are added in a similar way until a sample with a predetermined shape is formed.

EFFECT: resulting three-dimensional object demonstrates good dimensional stability.

18 cl, 46 ex