Patent ID: 6693143
Filing Date: 2004-02-17
Classification: A61K

Abstract:
A dental material comprising a polymerizable material and filler;said polymerizable material being selected from the group consisting of methacrylate and acrylate monomers having at least one polymerizable double bond, and mixtures thereof; said filler comprising a nanoscale material with a particle size of about 1 nm to about 100 nm, wherein said nanoscale material is prepared by chemical surface treatment, said surface treatment enabling the nanoscale material to form a stable sol with dental materials of a viscosity of below about 1 Pas, wherein said surface treatment includes silanating said nanoscale material in a non-aqueous solvent; wherein the silanating agent has at least one polymerizable double bond and at least one group that hydrolyses with water; wherein the silanating agent is selected from the group consisting of 3-methacryloxypropyldimethoxy-monochlorosilane, 3-methacryloxypropyldichloromonomethoxysilane, methacryloxypropyltrichlorosilane, 3-methacryloxypropyldichloromonomethyl-silane, 3-methacryloxypropylmonochlorodimethylsilane, and mixtures thereof; and wherein said material is selected from the group consisting of ground glass, ground quartz, highly dispersed silica, zeolite, laponite, kaolinite, vermiculite, mica, ceramic metal oxides, alumina, pyrogenic silica, sparingly volatile oxides of titanium, zirconium, germanium, tin, zinc, iron, chromium, vanadium, tantalum, niobium, and mixtures thereof; wherein the dental material has a viscosity of from about 0.0001 Pas to about 1 Pas.