Compositions for dental composites with tricyclo[5.2.1.02.6]decane derivatives

Dental composites comprising

• monomers,
• crosslinking agents,
• fillers,
• initiators, wherein
• A:
• the proportion of crosslinking agent is formed in an amount of more than 50% by acrylate monomers with a TCD urethane structure having the general formula
• in which
• A is a straight-chain or branched aliphatic radical with 2 to 20 carbon atoms, the radical containing, optionally, 1 to 3 oxygen bridges, an aromatic radical with 6 to 24 carbon atoms, an araliphatic radical with 7 to 26 carbon atoms or a cycloaliphatic radical with 6 to 26 carbon atoms,
• r represents the number of chains issuing from A and an integer of 2 to 6,
• R1 and R2 are identical and represent hydrogen or are different and represent hydrogen and methyl,
• n represents, for each chain issuing from A, independently an integer of 0 to 5,
• X represents the group
• in which
• R4 and R5 are identical or different and represent hydrogen, halogen, lower alkoxy, lower alkyl or trifluoromethyl,
• Z may contain a divalent straight-chain or branched aliphatic hydrocarbon radicals of 3 to 15 carbon atoms which, optionally, may contain 1 to 3 oxygen bridges atoms and, optionally, may be substituted by 1 to 4 additional (meth)acrylate radicals, R2, R3 are exclusively hydrogen, and
• B exhibits the cytotoxicity of the hardened composite corresponding to the standard requirements according to ISO 10993-5 and DIN EN ISO 7405, has the assessment “no cytotoxic potential”.