Suitability of Direct Resin Composites in Restoring Endodontically Treated Teeth (ETT).

(1) Background: The in vitro study aimed to investigate mechanical characteristics of resin composites and their suitability in direct restauration of endodontically treated teeth (ETT). (2) Methods: 38 endodontically treated premolars with occlusal access cavities were directly restored using the following resin composites and adhesives: Tetric Evo Ceram + Syntac classic ( = 10), Venus Diamond + iBond Total-Etch ( = 10), Grandio + Solobond M ( = 9), Estelite Sigma Quick + Bond Force ( = 9). After thermocycling, the elastic modulus, shear-bond-strength, fracture load (Fmax) and fracture mode distribution were evaluated.