Fracture Toughness Comparison of Three Indirect Composite Resins Using 4-Point Flexural Strength Method

Abstract

Within the limitations of this study, the results showed that high temperature-pressure polymerization can increase resistance to crack propagation and subsequently improve the clinical service of indirect composite restorations. Although we do not know the filler volume percentage of HIPC, it seems that filler volume percentage of the composite is inversely correlated with fracture toughness.