X-RAY OPAQUE DENTAL MATERIAL COMPRISING SURFACE-MODIFIED NANOPARTICLES

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The invention relates to a dental material, which contains surface-modified nanoparticles with an average particle size of less than 25 nm in the form of a filler, said nanoparticles being selected from the salts of barium, strontium, rare-earth metals, scandium or yttrium, or from wolframates. The surface of said nanoparticles is modified by an organic compound that bonds with the nanoparticles by means of a functional group containing N, P, S and/or O. Said dental material exhibits an excellent X-ray opacity, in addition to important processing characteristics such as transparency or dispersion stability.