Postoperative Pain Intensity After Using Different Instrumentation Techniques: a Randomized Clinical Study

Aim The aim of this clinical study was to evaluate the influence of the instrumentation techniques on the incidence and intensity of postoperative pain in single-visit root canal treatment. Methodology Ninety patients with single root/canal and non-vital pulps were included. The patients were assigned into 3 groups according to root canal instrumentation technique used; the modified step-back (stainless-steel hand files, HF), reciprocal (WaveOne, WO), and rotational (ProTaper Next, PTN). Root canal treatment was carried out in a single visit and the severity of postoperative pain was assessed by 4-point pain intensity scale. All the participants were called through phone at 12, 24 and 48 h to obtain the pain scores. Data were analyzed by the Kruskal-Wallis test.