Abstract
A new photocurable composite resin for dental restorations was synthesized using a monovinyl acrylate diluent. Its polymerization shrinkage, shrinkage stress, degree of conversion, and mechanical properties were investigated and compared to those of a conventional composite resin synthesized using a triethyleneglycol dimethacrylate diluent as well as three commercial resins: Tetric N-Ceram, Neofil, and Gradia Direct. The polymerization shrinkage and shrinkage stress of the new composite resin were statistically lower than those of the conventional resin (p<0.05), but not those of the commercial resins (p>0.05). The degree of conversion of the new resin was statistically better than all other tested resins (p<0.05) except the Neofil resin (p>0.05). The mechanical properties of the resins were not statistically different (p>0.05). Overall, the new composite resin exhibited less polymerization shrinkage, lower shrinkage stress, a higher degree of conversion, and similar mechanical properties to the other resins, demonstrating its potential for clinical application.
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