Prevalence of Technical Errors in a Sample of Endodontically Treated Teeth: a CBCT Analysis

Success in endodontic treatment is directly related to proper diagnosis and neutralization of microorganisms using mechanical and chemical methods and full canal obturation. Given that technical errors can affect the success of treatment and cone beame CT can detect these errors perfectly, the aim of this study was to determine the frequency of technical errors in root canal treatment using CBCT

In this descriptive-analytical study, 1067 endodontically treated roots in CBCT stereotypes were investigated. Fine-grained diagnostic radiographies were investigated in coronal, sagittal and axial planes. Filling length errors (tip to tip obturation, underfilling, overfilling, voide), errors during preparation (perforations, transport, broken instruments, missed canal and vertical root fracture) were recorded. The data were analyzed by Chi-square and Fisher's exact test

Moreover, the highest technical errors occurred were transport (23.8%), overfilling (21.2%), underfilling (21.1%) and voide (17.8%) and the lowest technical error occurred was zipping (0.3%). The highest technical errors occurred in the anterior regions including single canal teeth (18.7%) and single canal premolar (11.4%) and the lowest technical errors were found in the buccal and lingual canal of double canal canines (4 %). The frequency of radiographic lesions (p = 0.005) and the expansion of PDL (p <0.001) were significantly different between different dental areas; however, the frequency of resorption was not significantly different between different dental areas (p = 0.11).

The highest observed error was in the anterior area of a canal and the lowest error rate determined by the CBCT was related to the two canal canine (buccal) and two canal canine (lingual). transport, short-term filling, and void were the most endodontic errors and the lowest ones were related to zipping cousing with broken file and post perforation  in the root canal treatment.