Dental composite material

Polymerisable dental composite material, comprising:

• (i) an inorganic filler component comprising:
• (i.1) 70 to 84% by weight of at least one dental glass, wherein
• a) the dental glass has an average particle size d50 of 1.8 μm, or
• b) the dental glass comprises a mixture of dental glasses having an average particle size, with i) d50 of 2 to 8 μm, ii) d50 of 1.0 to 2.0 μm, and iii) d50 of 0.5 μm to 2 μm, the fractions of i) to ii) to iii) being present in a ratio of 1 to 4:1:4 to 8, and
• (i.2) 2 to 10% by weight amorphous metal oxide,
• (ii) a mixture of at least three different urethane acrylates, the mixture comprising
• 10 to 18% by weight of at least one urethane acrylate having a bivalent alicyclic group of the idealised formula I
• and/or mixtures of said urethanes of formula I, as well as optionally mixtures of the isomers of the afore-mentioned compounds with R1 and R2 each independently selected from H and alkyl having 1 to 8 C-atoms, and
• 3 to 8% by weight of at least one further di-functional urethane acrylate and/or urethane (alkyl) acrylate having a bivalent alkylene group and not satisfying formula I, and
• 0.2 to 2% by weight of at least one at least tetra-functional dendritic urethane methacrylate comprising
• tetra- to deca-functional dendritic urethane methacrylates,
• (iii) 0.01 to 2% by weight of at least one substance selected from the group consisting of di-methacrylic esters of polyethers, tri-, tetra- or multi-functional methacrylic esters of polyethers and bis-(2′-oxa-3′-oxo-pentyl-4′-ene) tetrahydrodicyclopentadiene and isomers thereof,
• (iv) 0.01 to 10% by weight of at least one initiator, of an initiator system, as well as optionally of at least one stabiliser, and optionally of at least one pigment,
• wherein each % by weight is based on a total weight of the composite material, the total weight of the composite material amounting to 100% by weight.