Dental materials based on low-viscosity radically polymerizable monomers with a high refractive index

A dental material, comprising at least one radically polymerizable, difunctional phenylene sulfide according to Formula I,

• in which
• X, Y independently of each other in each case are absent or are 0 or NR6,
• R1, R2 independently of each other in each case are H, a linear or branched C1 to C10 alkyl radical, —OR7, —SR8, Cl or Br,
• R3 is absent or is a C1-C10 alkylene radical, which can be interrupted by O or S,
• R4 is absent or is a C1-C10 alkylene radical, which can be interrupted by O or S,
• R5 is H or a C1-C5 alkyl radical,
• R6, R7, R8 independently of each other in each case are H or a linear or branched C1 to C10 alkyl radical,
• a, b, c, d independently of each other in each case are 0 or 1 and
• e is 1 or 2,
• at least one mono- or multifunctional (meth)acrylate, and
• at least one filler in an amount of 65-85% of the dental material.