Effects of Different Irrigation Activation Techniques on the Healing of Large Periapical Lesions

After the teeth were isolated with a rubber dam, the endodontic access cavity was opened. Then, #10-15 K-type hand files were inserted into the canals, and after determining point 0.0 with the electronic apex locator, the working length was determined to be 0.5 mm shorter than this point and confirmed radiographically. When a discrepancy was observed, the apex locator was considered correct. The root canals were prepared with ProTaper Next up to 3 sizes larger than the initial diameter via a torque-controlled endodontic motor in 300 rpm/2-5.2 Ncm rotation mode. Between each file, the canals were irrigated with 5 ml of 2.5% NaOCl. In retreatment cases, after opening the access cavity under rubber dam isolation, the guta percha was removed with RT files, and the rest of the procedure was performed in the same manner as for primary root canal treatment.