Effect of camphorquinone (CQ) photoinitiator on the dental properties of polymeric dental restorative composites (PDRC) was investigated. The surface of the barium silicate filler (avg. diameter: 1 μm) was treated with γ-methacryloxypropyl-trimethoxysilane to improve the interfacial behavior between the resin matrix and filler. A visible light system was utilized to activate the resin matrix in PDRC and the contents of CQ were varied from 0.1 to 1.0 wt% based on 2,2'-bis-[4-(3-methacryloxy-2-hydroxypropoxy)phenyl]propane/triethyleneglycoldimethacrylate (70/30 wt%/wt%) resin matrix. From the experimental results, it was discovered that the PDRC prepared using 0.5 wt% of CQ based on the resin matrix resulted in the finest dental properties.