Influence of length of root canal obturation on apical periodontitis detected by periapical radiography and cone beam computed tomography.

Introduction: The verification of the best length of root canal instrumentation and obturation still is controversial theme in endodontics. The purpose of this study was to determine the influence of length of root canal obturation on apical periodontitis (AP) detected by periapical radiography and cone beam computed tomography (CBCT).

Methods: A total of 503 root canal obturations were evaluated by using periapical radiography and CBCT.

Prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults.

The aim of this study was to assess the prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults. A total of 1,372 periapical radiographs of endodontically treated teeth were analyzed based on the quality of root filling, status of coronal restoration and presence of posts associated with apical periodontitis (AP). Data were analyzed statistically using odds ratio, confidence intervals and chi-square test.