Retrospective Investigation of The Relationship Between Coronal Restoration and Quality of Root Canal Fillings and Apical Periodontitis in a Specific Turkish Population

Objective: The purpose of this study was to retrospectively assess the prevalence and efficacy of endodontic treatments in Turkish subpopulations, as well as the relationship between the type of coronal restorations, procedural errors, and their association with the periapical status of treated teeth. Methods: Cone beam computed tomography (CBCT) images of 500 patients were analyzed. A total of 10500 teeth were evaluated and 1185 of those had received root canal therapy. Periapical condition, coronal restoration, and root canal quality of these teeth were evaluated. Periapical status was evaluated by two observers regarding to CBCT periapical index scoring system. The chi-square test was used to evaluate all data for statistical analysis. Results: Healthy periapical status was seen in 44.9% of endodontically treated teeth. Teeth with procedural errors (broken instrument, untreated canal, perforation, ledge formation, short or overfilled canals, inadequate filling) showed more periapical pathosis than teeth with good endodontic treatment (p<0.05). Additionally, it was found that teeth with sufficient coronal restoration had lower prevalence of apical periodontitis. However, existence of post did not effect periapical status (p<0.05). Conclusion: The effectiveness of the root canal treatment and the periapical status were considerably influenced by the quality of coronal restoration.