Aesthetic dental filling material having high curing depth

A dental material characterized in that it comprises

• (a) at least one radically polymerizable monomer,
• (b) ytterbium trifluoride with a volume-averaged particle size (D50 value) of ≤25 nm, measured as detailed in the description, as a radiopaque filler,
• (c) at least one inorganic filler,
• (d) at least one composite filler, and
• (e) at least one initiator for the radical polymerisation comprising a photoinitiator,
• wherein the dental material contains a radically-polymerizable monomer (a) comprising a mixture of
• (a-1) 20 to 80 wt. % of at least one urethane dimethacrylate,
• (a-2) 10 to 40 wt. % of at least one bisphenol A derivative,
• (a-3) optionally up to 40 wt. % of at least one tricyclic dimethacrylate,
• (a-4) optionally up to 20 wt. % of other monomers which do not fall into one of the groups (a-1) to (a-3) and (a-5), and
• (a-5) optionally up to 8 wt. % of at least one chain regulator, in each case based on the total mass of component (a),
• wherein the refractive index of the monomer component (a) is equal to or at most 0.03 greater than the refractive index of the filler (c), and wherein the refractive index of the monomer component (a) is equal to or at most 0.025 greater than the refractive index of the filler (d).