The effect of two rotary and two reciprocating NiTi systems on postoperative pain after root canal retreatment on single-rooted incisor teeth: A randomized controlled trial.

Abstract

AIM\nThis randomized clinical trial aimed to assess the effect of two rotary (ProTaper Retreatment + ProTaper Gold and Hyflex EDM) and two reciprocating (Reciproc Blue and WaveOne Gold) NiTi systems on postoperative pain after root canal retreatment on single-rooted incisor teeth.\n\n\nMETHODOLOGY\nOne hundred and eighty patients scheduled for root canal retreatment were randomly assigned to one of the four groups according to the NiTi system (ProTaper Retreatment + ProTaper Gold, Hyflex EDM, Reciproc Blue or WaveOne Gold) used for removal of root canal fillings and further canal preparation. The working length was determined to be 1 mm shorter than the 0.0 mark of the apex locator. Root canals were filled with gutta-percha and epoxy resin-based root canal sealer using a lateral condensation technique. The teeth were restored using a resin composite material. A single operator performed the retreatments in a single visit. The incidence and intensity of postoperative pain were rated on a numeric rating scale by patients at 24, 48, and 72 h after retreatment. The number of analgesic tablets (400 mg Ibuprofen) taken by patiens was also recorded. Data were analysed using Mann - Whitney U, Wilcoxon, and chi-square tests.\n\n\nRESULTS\nFor the intensity of postoperative pain, the difference between the four groups was not significantly different (P > 0.05). No significant difference was found between the groups in terms of analgesic medication intake (P > 0.05).\n\n\nCONCLUSIONS\nThe rotary and reciprocating NiTi systems tested in this study were associated with similar levels of postoperative pain and intake of analgesics following root canal retreatment on single-rooted incisor teeth completed in one visit.