evaluation of apical third enlargements to twice and thrice larger than initial apical binding file in final treatment outcome.

Root canal treatment is a critical procedure in endodontics, aimed at eliminating microorganisms and pathological debris from the root canal system to prevent reinfection and ensure the health of the periradicular tissues. A total of 180 patients with asymptomatic apical periodontitis (PAI score >3) were included in this randomized clinical trial. Patients were divided into two main groups, each with three subgroups based on the biomechanical preparation of the canals using different file sizes and tapers.