Comparative Evaluation of Different File Systems in Postoperative Pain

Postoperative pain is a frequent complication associated with root canal treatment. The apical extrusion of irrigant and debris, including bacteria and necrotic tissue, may lead to postoperative pain, periapical inflammation, and flare-ups. The instrumentation technique and the file design may affect the amount of debris extrusion. The aim of this study was to evaluate the influence of instrumentation techniques on the incidence and intensity of postoperative pain after single-visit root canal treatment.