Adhesive bonding composition and use thereof

An adhesive dental composition comprising:

• Polymerizable monomer (1),
• Polymerizable monomer (2) comprising an acidic moiety,
• Initiator component(s),
• Filler component(s) in an amount of less than about 15 wt.-% with respect to the whole weight of the composition,
• the polymerizable monomer (1) being characterized by formula (I)
• with:
• B-O-A-[-O-B′-]a representing an unsymmetrical 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:
• *—(CH2)b—*, *—(CH2—CH2—O—CH2—CH2)—*, *—(CH2—CH2—O—CH2—CH2—CH2)—*,
• B being always attached as alkyl ester onto the (meth)acrylate reactive moiety,
• b=2 to 6,
• B′ being selected from *—(CH2)b′—*, *—(CH2—CH2—O—CH2—CH2)—*,
• 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,
• “*” representing those site(s) of a moiety of the monomer, where that moiety is bonded to another moiety of the monomer.