Highly cross-linked networks for dental applications obtained by photocuring of tris[2-(acryloyloxy)ethyl]isocyanurate, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate, and pentaerythritol triacrylate

Highly cross-linked networks have been obtained by photoinitiated camphorqu inone-amine polymerization of tris [2-(acryloyloxy)ethyl] isocyanurate alon e and/or with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate or pent aerythritol triacrylate, which can be considered a new class of dental rest orative resins. The most effective coinitiators in this system are amines s uch as ethyl-4-dimethylaminobenzoate, N,N-dimethyl-benzylamine, and 2,4,6-t ris(dimethylaminomethyl)phenol. The volume shrinkages of polymerized sample s were 8%-13%. The hardness of photocured resins in the presence of an inor ganic filler (aluminum/fluoro/silicate glass, Ketac-Fil) was slightly less than that of a restorative composite material (Z100 MP).