Dental Composites with a Low Shrinkage Tension and High Flexural Strength

1 . Dental composite materials having a total filler content of 70 to 95% by weight and comprising:

a) 0.5 to 10% by weight of non-agglomerated nanofillers with particle sizes of 1 to 50 nm in a filler component;

b) particulate dental glass, at least 60% by weight of a filler mixture of 50 to 90% coarsely and 10 to 50% finely particulate dental types of glass in a ratio, of finely particulate to coarsely particulate of 1:4 to 1:30 in the filler component;

c) as monomer component, a monomer mixture comprising

i. 60-80% by weight bis-GMA and a member of the group of TCD-di-HEMA or TCD-di-HEA

ii. 10 to 18% by weight UDMA

iii. the remainder being TEDMA and/or multifunctional crosslinking agents;

d) up to 1% by weight of initiator(s) and

e) optionally, in the filler component, at least one further dental glass with a particle size which differs from the coarsely and finely particulate dental types of glass; wherein the proportion of TCD monomers in the total composition is 1-15% by weight and a quotient of flexural strength/shrinkage tension is >/=35.

2 . Dental composite materials according to claim 1 , wherein the proportion of TCD monomers in the total composition is 10-15% by weight.

3 . Dental composite materials according to claim 1 , wherein the quotient of flexural strength/shrinkage tension is >/=40.

4 . Dental composite materials according to claim 1 , wherein the quotient of flexural strength/shrinkage tension is >/=50.