The Effects of EndoActivator on Postoperative Pain and Root Canal Treatment Success

Aim: To evaluate postoperative pain and radiographic healing of asymptomatic posterior teeth with chronic apical periodontitis following root-canal treatment performed using EndoActivator for irrigation activation. Methodology: In this clinical trial, root-canal treatment was performed on 140 posterior teeth with chronic apical periodontitis. After routine canal preparation, patients were assigned to either a control group treated using conventional needle irrigation (CNI) without activation or to sonic irrigation activation with EndoActivator. All treatment was completed in a single visit. Patients provided self-assessments of the severity of postoperative pain at 1, 2,3 and 7 days using a Verbal Rating Scale (VRS) and Wong Baker Face Scale. Patients were recalled at 12 months for clinical and radiographic examinations. Periapical healing was evaluated using a periapical index (PAI), with scores of 1 or 2 considered to represent treatment success and scores of 3, 4, or 5 to represent treatment failure. Data were analyzed using one-way ANOVA and Kruskal-Wallis tests, with differences of P \< 0.05 considered statistically significant.