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Dental materials containing hydrophobic silicic acid co nanoparticulate and their use

The present invention relates to dental materials containing liquid, nanoparticulate, functionalized hydrophobic co-condensates of Kieselsauretetraalkylestern with functionalized trialkoxysilanes of the formula I P- (CH wherein P, R and n independently have the following meanings: P = a polymerisable CH R = methyl, ethyl or propyl and n = 3-15, produced by co-condensation of ω-position in Kieselsauretetraalkylestern with functionalized alkyltrialkoxysilanes and then with trimethylsilyl end group. Furthermore, the invention relates to the use of the dental materials for filling composites, fixing cements or materials for coatings.