Comparative Evaluation of Efficacy of Two Different Techniques in Removing Intracanal Medicament (Calcium Hydroxide) From the Root Canal System: An in Vitro Scanning Electron Microscope Study

Hydroxide (CaOH ) from the root canal by using a scanning electron microscope. Thirty extracted single- 2 Methods: rooted teeth were divided randomly into 2 groups. Canal instrumentation was done, and the teeth were filled with Ca(OH) paste. One week later, 2 techniques were used for Ca(OH) removal. In the first group, the canals were cleaned 2 2 with a master apical file. The second group was irrigated using the and ProUltra (Dentsply Tulsa, Tulsa,OK) system (Ultrasonic irrigation device). Both the groups were irrigated with 3 mL (18%) EDTA and 2 mL (1%) NaOCl for 1 minute. The canal walls were viewed, and the remaining amount of Ca(OH) was evaluated using a scanning electron 2 microscope. A scoring system was used to assess the amount of residue Ca(OH) on each third of the canal. The obtained 2 data for comparisons between the master apical file and Ultrasonic irrigation device were statistically analyzed. Results: Conclusions: To compare the 2 devices, the results were statistically analyzed. None of the two investigated techniques removed the Ca(OH) dressing completely. However, the Ultrasonic irrigation System showed better results 2 in removing Ca(OH) in each third of the root canals in comparison with the MAF technique.