Influence of the Photoinitiator Concentration on the Mechanical and Optical Properties of Dental Resins

The dependence of the photoinitiator concentration on degree conversion, mechanical properties and colour appearance dental materials was studied. Alterations due to changes in were-undertaken. Test samples prepared by photopolymerizing BisGMA TEGDMA presence camphorquinone (CQ) were submitted analyses, i.e., compressive diametral tensile strength Barcol hardness tests CIELAB analysis. showed a levelling off at concentrations around 0.5% remained those values up 1.0%, whereas DTS didn´t show any variation over that range concentrations. experiments with CQ system its intense absorption yellow region. results indicate photopolymerization systems containing CQ/EDB as between 0.5 1.0% present similar properties.