Patent ID: 6399037
Filing Date: 2002-06-04
Classification: A61K

Abstract:
A filler for use in a dental material, 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 silantation said nanoscale material in a non-aqueous solvent; wherein the silantation 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 of3-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.