A dental composition comprising: a resin matrix comprising: cross-linkable component(s) as Component A, ethylenically unsaturated component(s) with acidic moiety as Component B, an initiator system comprising photoinitiator(s) as Component C, reducing agent(s) as Component D, Component A being characterized by the following formula: with: B-O-A-[-O-B'-] a representing the monomer backbone as linkage between the reactive (meth)acrylate moieties, a = 0 or 1, A being selected from: A being always attached as aryl-alkyl ether onto B and/or 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 being selected from H, methyl, ethyl, hexyl, tert-butyl, Br, Y = H, Br, " ∗ " representing those site(s) of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. a resin matrix comprising: cross-linkable component(s) as Component A, ethylenically unsaturated component(s) with acidic moiety as Component B, an initiator system comprising photoinitiator(s) as Component C, reducing agent(s) as Component D, cross-linkable component(s) as Component A, ethylenically unsaturated component(s) with acidic moiety as Component B, an initiator system comprising photoinitiator(s) as Component C, reducing agent(s) as Component D, Component A being characterized by the following formula: with: B-O-A-[-O-B'-] a representing the monomer backbone as linkage between the reactive (meth)acrylate moieties, a = 0 or 1, A being selected from: A being always attached as aryl-alkyl ether onto B and/or 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 being selected from H, methyl, ethyl, hexyl, tert-butyl, Br, Y = H, Br, " ∗ " representing those site(s) of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. B-O-A-[-O-B'-] a representing the monomer backbone as linkage between the reactive (meth)acrylate moieties, a = 0 or 1, A being selected from: A being always attached as aryl-alkyl ether onto B and/or 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 being selected from H, methyl, ethyl, hexyl, tert-butyl, Br, Y = H, Br, " ∗ " representing those site(s) of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. B' being always attached as alkyl ester onto the (meth)acrylate reactive moiety, b' = 2 to 6, R = H, methyl, X being selected from H, methyl, ethyl, hexyl, tert-butyl, Br, Y = H, Br, " ∗ " representing those site(s) of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer. <EOS>