Fracture Behavior of Short Fiber-Reinforced Direct Restorations in Large MOD Cavities

The aim of this research was to study the impact using a short fiber-reinforced composite (SFRC) core on fatigue performance and fracture behavior direct large posterior restorations. Moreover, influence consistency (flowable or packable) occlusal coverage assessed. A total 100 intact molars were collected randomly distributed into five groups (n = 20). Deep mesio-occlusal-distal (MOD) cavities prepared in all groups. After adhesive treatment rebuilding missing interproximal walls with conventional composite, specimens four experimental restored by an SFRC (everX Flow), which applied cured either bulk oblique layers (each 2 mm thick). Packable (G-aenial Posterior) flowable Injectable) composites used as final layer. control group only packable composite. Fatigue survival measured for cyclic loading machine until occurred 25,000 cycles achieved. Kaplan–Meyer analyses conducted, followed pairwise log-rank post hoc comparisons. static load-bearing capacity surviving teeth tested universal testing machine. Fracture patterns evaluated visually. There no statistically significant (p > 0.05) difference terms between All showed significantly higher capacities compared < 0.05). differences regarding resistance among Regarding pattern during analysis, that received dominantly restorable type fracture, while presented non-restorable type. use reinforcing MOD restorations promising achievements behavior.