Light-cured dental composite modified with liquid rubber and method of its production

摘要

The reporting is a light-resistant liquid rubber-modified composite with reduced polymerisation shrinkage and increased water-solubility resistance, consisting of 20-50% weights. an organic matrix consisting of dimethacrylate resins (Bis-GMA, TEGDMA, UDMA, Bis-EMA) as well as a photoinitiating system, stabiliser and inhibitor, mixed in 5-30-min with 2%weight. liquid copolymer of poly(acrylonitrile-co-butadiene),Having reactive metacrystalline function groups; the ceramic filler portions in 50-80% weight containing the Ba-Al-B-Si glass, pyrogenic silicon, titanium dioxide and pigments from which the first portion is mixed with the core to disperse the copolymer and to obtain its homogeneous distribution in volume over the 30-120 mines, the second batch of fillers is inserted into the mixer and the mixing process is carried out over the next 30-120 mines, at a temperature up to 20-60,followed by the reaction phase of the mixture using the pressure range 0,02 to 0,07 MPa.