Postoperative Pain After Root Canal Preparation Using Different Engine-driven Systems

A hundred twenty patients who had an asymptomatic mandibular molar teeth with periapical lesion were included. For each patient, teeth were prepared with Reciproc Blue or Protaper Universal instruments. Each tooth was obturated with gutta-percha and resin-based sealer using single cone technique for mesial roots and for distal roots single cone and cold lateral compaction technique. Root canal treatment was performed in a single visit. Postoperative pain was assessed as no, mild, moderate, or severe at 6, 12, 24, 48, 72 hours and 7 days after obturation.