Polymerizable dental material with dispersed non-agglomerated silicon dioxide nanoparticles optionally containing other oxides is highly transparent

摘要

A polymerizable dental material containing a monomer (mixture) sol with dispersed predominantly non-agglomerated nanoparticles of particle size 1- below 10 nm is such that the nanoparticles are of silicon dioxide optionally mixed (or in the form of mixed oxides) with zirconium dioxide, aluminum oxide (Al2O3) and/or titanium dioxide. An independent claim is also included for production of the material by mixing the sol with further fillers, initiators and optionally also further conventional additives, the sol having been obtained by (1) preparing an aqueous sol of the SiO2 and optionally the other oxides; (2) treating with a surface modifier; (3) working the sol into a volatile solvent, e.g. isopropanol; (4) removing the water by azeotropic distillation; (5) working the alcoholic sol into a monomer (mixture); and (6) removing the alcohol from the monomer (mixture).