A dental composition comprising - Polymerizable monomer, - Initiator component(s), - Filler component(s) in an amount of more than 20 wt.-%, wt.-% with respect to the whole weight of the composition, the polymerizable monomer being characterized by either formula (Ia) or formula (Ib) with: B-O-A-O-B' being an unsymmetrical monomer backbone as linkage between the reactive (meth)acrylate moieties, A being selected from A being always attached as aryl-alkyl ether onto B and B', B being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, *-(CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2)-*, *-(CH 2 -CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2)-*, B being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b = 2 to 6, B' being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, B' being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b' = 2 to 6, R = H, methyl, X = H, methyl, ethyl, hexyl, tert-butyl; or with: B-O-A being an unsymmetrical monomer backbone as linkage between the reactive (meth)acrylate moieties, A being selected from: A being always attached as aryl-alkyl ether onto B and always attached as alkyl ester onto the (meth)acrylate reactive moiety, B being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, B being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b = 2 to 6, R = H, methyl; "*" representing those sites of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. - Polymerizable monomer, - Initiator component(s), - Filler component(s) in an amount of more than 20 wt.-%, wt.-% with respect to the whole weight of the composition, B-O-A-O-B' being an unsymmetrical monomer backbone as linkage between the reactive (meth)acrylate moieties, A being selected from A being always attached as aryl-alkyl ether onto B and B', B being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, *-(CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2)-*, *-(CH 2 -CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2)-*, B being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b = 2 to 6, B' being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, B' being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b' = 2 to 6, R = H, methyl, X = H, methyl, ethyl, hexyl, tert-butyl; or with: B-O-A being an unsymmetrical monomer backbone as linkage between the reactive (meth)acrylate moieties, A being selected from: A being always attached as aryl-alkyl ether onto B and always attached as alkyl ester onto the (meth)acrylate reactive moiety, B being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, B being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b = 2 to 6, R = H, methyl; "*" representing those sites of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. B-O-A being an unsymmetrical monomer backbone as linkage between the reactive (meth)acrylate moieties, A being selected from: A being always attached as aryl-alkyl ether onto B and always attached as alkyl ester onto the (meth)acrylate reactive moiety, B being selected from: *-(CH 2) b -*, *-(CH 2 -CH 2 -O-CH 2 -CH 2)-*, B being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b = 2 to 6, R = H, methyl; "*" representing those sites of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer.