Can fiber-reinforced resin composites alone substitute adhesively luted intraradicular post and core materials under static and dynamic loading?

This study investigated the load bearing capacity of intraradicular posts and core materials under static dynamic loading. Human teeth with single root (N = 154, n 14 per sub group) were endodontically prepared randomly divided into six groups: CON: Sound premolars; TP: Titanium post (Flat Head T); FRCP: Indirect E-glass FRC (FRC Postec Plus); FRCC: Fiber-reinforced resin composite (Everex Posterior) as core; RCW: Hybrid (Tetric) woven fiber network (EverNet) between canal RC: material. Groups TP, FRCP luted adhesively in (Panavia 21), while other groups bonded directly to dentin. In FRCP, RCW, material was hybrid composite. The then restored CAD/CAM (ArtBlock Temp). While half specimens each group fractured after 4 weeks water storage, subjected chewing simulation (x1.200.000; 5–55 °C). Data for Finitial (N) Fmax analyzed using 2-way ANOVA Tukey’s tests (alpha 0.05). Fracture strength values significantly affected by type (p < 0.05) fatigue conditions After cyclic loading, lower TP (222.70) RCW (238.60), compared (335.50 ? 377.20) (742.11). presented mainly cohesive failure crown adhesive detachment from showed predominantly irreparable failures.