Compare and evaluate fracture strength of endodontically treated mandibular premolar teeth restored using different...

The optimal method for restoring endodontically treated teeth remains a subject of ongoing clinical debate. While prefabricated posts are frequently recommended to support final restorations, their necessity and overall effectiveness continue to be a point of professional controversy. Therefore, it is of interest to evaluate the effect of fiber posts on the fracture resistance of endodontically treated mandibular premolars, where 60 standardized mandibular premolars were restored using and divided into three groups: Group A (no post), roup B (glass fiber post) and Group C (carbon fiber post). A universal testing machine was used to apply axial force and determine the failure point of each specimen. Thus, we show that the highest fracture strength is maintained when teeth are restored without a post, provided sufficient natural tooth structure is preserved. In cases where a post is required, glass fiber systems demonstrated statistically significant superiority over carbon fiber alternatives. Consequently, the study concludes that posts do not reinforce the tooth structure but are primarily for restoration retention, with glass fiber being the preferred material for its strength and aesthetic properties.