A dental composition comprising: (i) a dental filler containing a structural filler having an average particle size of from 0.1 to 3 μm, measured by light scattering, the structural filler comprising YbF3 and a silanized 0.6 μm Ba glass;and wherein the dental composition contains 0.5 to 60% by weight of the structural filler based on the total weight of the composition and silanated glass flakes, consisting of glass coated with hydrophobic 3-(trimethoxysilyl) propyl methacrylate, (a) wherein the silanated glass flakes have an average thickness between 50 nm and 1000 nm, wherein the average thickness is measured according to the description;, wherein the glass flakes have an average aspect ratio (long diameter/thickness) in the range of from 2:1 to 50:1, wherein the dental composition contains 1-85% by weight of the dental filler (i) based on the total weight of the composition; (ii) a monomer mixture comprising dimethacrylate resins, fluorescent pigment, UV stabilizer, a stabilizer and (iii) at least one initiator system, wherein the glass of the silanated glass flakes comprises the following components as oxides in percent by weight: SiO2 = 64 - 70 B2O3 = 2-5 ZnO = 1 - 5 Na2O = 8 - 13 MgO = 1 - 4 CaO = 3-7 Al2O3 = 3-6 and up to 3 percent by weight of K2O and TiO2. (i) a dental filler containing a structural filler having an average particle size of from 0.1 to 3 μm, measured by light scattering, the structural filler comprising YbF3 and a silanized 0.6 μm Ba glass;and wherein the dental composition contains 0.5 to 60% by weight of the structural filler based on the total weight of the composition and silanated glass flakes, consisting of glass coated with hydrophobic 3-(trimethoxysilyl) propyl methacrylate, (a) wherein the silanated glass flakes have an average thickness between 50 nm and 1000 nm, wherein the average thickness is measured according to the description;, wherein the glass flakes have an average aspect ratio (long diameter/thickness) in the range of from 2:1 to 50:1, wherein the dental composition contains 1-85% by weight of the dental filler (i) based on the total weight of the composition; a structural filler having an average particle size of from 0.1 to 3 μm, measured by light scattering, the structural filler comprising YbF3 and a silanized 0.6 μm Ba glass;and wherein the dental composition contains 0.5 to 60% by weight of the structural filler based on the total weight of the composition and silanated glass flakes, consisting of glass coated with hydrophobic 3-(trimethoxysilyl) propyl methacrylate, (a) wherein the silanated glass flakes have an average thickness between 50 nm and 1000 nm, wherein the average thickness is measured according to the description;, wherein the glass flakes have an average aspect ratio (long diameter/thickness) in the range of from 2:1 to 50:1, wherein the dental composition contains 1-85% by weight of the dental filler (i) based on the total weight of the composition; (a) wherein the silanated glass flakes have an average thickness between 50 nm and 1000 nm, wherein the average thickness is measured according to the description;, (ii) a monomer mixture comprising dimethacrylate resins, fluorescent pigment, UV stabilizer, a stabilizer and (iii) at least one initiator system, wherein the glass of the silanated glass flakes comprises the following components as oxides in percent by weight: SiO2 = 64 - 70 B2O3 = 2-5 ZnO = 1 - 5 Na2O = 8 - 13 MgO = 1 - 4 CaO = 3-7 Al2O3 = 3-6 and up to 3 percent by weight of K2O and TiO2.