IADR Abstract Archives
Mechanical Properties of Novel Fiber-reinforced Flowable Composite Resin, everX Flow
Objectives: everX Posterior was released in 2013 as a putty-type fiber-reinforced composite resin and has shown excellent fracture toughness that in turns positively impacts the strength and durability of the restorations. Meanwhile, clinicians have desired the improvement of usability and cavity-wall adaptation of this product. Therefore, we developed a new fiber-reinforced flowable composite resin, everX Flow (EXF), for dentin replacement. In this study, mechanical properties of EXF and other composite resins were evaluated.
Methods: EXF (GC), SureFil SDR (SDR, Dentsply Sirona), SureFil SDR Flow+ (SDRF+, Dentsply Sirona), Tetric EvoFlow Bulk Fill (TEF, Ivoclar Vivadent), Filtek Bulk Fill Flowable Restorative (FBF, 3M) and x-tra base (XTB, VOCO) were evaluated in this study. The specimens were prepared in accordance with ISO 4049:2019, and three-point bending test was conducted with a crosshead speed of 1mm/min (n=5). Results were analyzed by Tukey-Kramer method (p<0.01).
Results: EXF showed the highest flexural strength and flexural modulus among all composite resins evaluated in this study and their values were 171±10MPa and 11.4±0.4GPa, respectively. The flexural modulus of EXF was improved by the blended short fiber, and it was possible to make its flexural modulus close to that of dentin compared to other products. In addition, EXF specimens after the three-point bending test did not break in two pieces, suggesting that the fiber blended in EXF prevented crack propagation.
Conclusions: These results suggest that high flexural strength, high flexural modulus and fiber reinforcement of EXF reduce the risk of fracture and chipping of restorations made of EXF.
Methods: EXF (GC), SureFil SDR (SDR, Dentsply Sirona), SureFil SDR Flow+ (SDRF+, Dentsply Sirona), Tetric EvoFlow Bulk Fill (TEF, Ivoclar Vivadent), Filtek Bulk Fill Flowable Restorative (FBF, 3M) and x-tra base (XTB, VOCO) were evaluated in this study. The specimens were prepared in accordance with ISO 4049:2019, and three-point bending test was conducted with a crosshead speed of 1mm/min (n=5). Results were analyzed by Tukey-Kramer method (p<0.01).
Results: EXF showed the highest flexural strength and flexural modulus among all composite resins evaluated in this study and their values were 171±10MPa and 11.4±0.4GPa, respectively. The flexural modulus of EXF was improved by the blended short fiber, and it was possible to make its flexural modulus close to that of dentin compared to other products. In addition, EXF specimens after the three-point bending test did not break in two pieces, suggesting that the fiber blended in EXF prevented crack propagation.
Conclusions: These results suggest that high flexural strength, high flexural modulus and fiber reinforcement of EXF reduce the risk of fracture and chipping of restorations made of EXF.
