Fracture toughness and cyclic fatigue resistance of resin composites with different filler size distributions

Influence of different curing modes on flexural properties, fracture toughness, and wear behavior of dual-cure provisional resin-based composites

“…K IC indicates the ability of a material to resist crack propagation 29) , and is related to the chipping and bulk fracture of dental materials in clinical situations 27) . Therefore, KIC is an informative when attempting to predict the longevity of provisional restorations in the intraoral environment.…”

Reliability, failure probability, and strength of resin-based materials for CAD/CAM restorations

“…Brittle materials, such as ceramics and composites, are very sensitive to the presence of flaws 15,19 . These flaws act as stress concentrators and are often characterized as scratches, non-uniform matrix and filler interface, foreign bodies, pores, and other innate defects.…”

“…Resin composites used for direct restorations can present high elastic modulus and fracture strength. In addition, these materials can have a subcritical crack growth susceptibility coefficient as high as 40, resulting in high resistance to slow crack growth 15,16,24 . However, they have some inherent drawbacks such as polymerisation shrinkage, shrinkage stress, and limited depth of cure.…”

Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

“…29 Ornaghi et al also found that the fracture toughness of resin composite containing 78 wt% glass particles with a size of 1.9 µm was higher than that of resin composites containing smaller particles; they attributed the increase in fracture toughness to crack deflection. 30 Asar et al found that adding Al 2 O 3 , TiO 2 and ZrO 2 fillers with average sizes of 12.4, 9.6 and 8.6 µm, respectively, at different percentages (1% TiO 2 and 1% ZrO 2 , 2 wt% Al 2 O 3 , 2 wt% TiO 2 and 2 wt% ZrO 2 ) significantly increased the fracture toughness of poly(methyl methacrylate) (PMMA) denture base composites. 31 In the study, the fracture toughness of the test groups was significantly higher than that of control group (p < 0.05).…”