Abstract
Compositions of seven visible light-cured composite resins were examined, and amounts of monomer eluted from these cured resins were measured by means of high performance liquid chromatography. As base monomer of these materials, Tri-EDMA, Bis-GMA, Bis-MPEPP and/or UDMA were used as similar as the conventional chemically-cured composite resins. For one material, new monomer, Di(methacryloxymethylene)-tricyclo [5.2.1.02, 6 decane was contained. Inorganic filler contents of these materials varied from brand to brand, and were in the range of 32 to 80wt%. Two kinds of these used the conventional large fillers, the size of which were in the range of about 0.2 to 20μm. Other five kinds used microfillers, and four kinds of these contained the organic composite fillers. The amounts of residual monomer eluted from these visible light-cured composite resins with one-month acetone extraction, were about 2 to 7 times that of the chemically-cured composite resin. In a comparison of amounts of monomer eluted from seven visible light-cured resins, that of two kinds which contained the conventional fillers in quantity were lower than that of the other five microfilled composites.
