Filled, polymerisable dental material and process for the production thereof

Polymerizable dental material comprises an organic binder, a nanoparticulate filler and a second filler comprising ground particles with an average size of 0.2-50 mu m or spherical particles with an average size of 0.1-50 mu m. At least 50 wt.% of the nanoparticles have a diameter of less than 100 nm and at least 20% of the nanoparticles are aggregated particles. An independent claim is also included for producing dental materials by treating an at least partially agglomerated and/or aggregated nanoparticulate filler with an organic surface-modifying agent, working the nanoparticulate filler into an organic binder until at least 50 wt.% of the nanoparticles have a diameter of less than 100 nm, and working a second filler as above into the binder.