Capar, et al.8 (2014) compared CH removal efficiency of EndoVac, Self-Adjusting File (SAF), PUI and conventional irrigation techniques from artificial standardized grooves. They reported that PUI was more effective than other groups when NaOCl was used. Ahmetoglu, et al.1 (2013) compared CH removal efficiency of PUI, SAF and conventional irrigation methods by SEM. Researchers found that PUI was more effective than SAF and traditional irrigation. These results support our research. PUI technique is based on the transmission of acoustic energy to an irrigation solution. The agitation increases the penetration of irrigant to the irregular canal areas and the CH removal capacity of the irrigation solution. Similarly, van der Sluis, et al.30 (2007) investigated the efficiency of CH removal of various irrigation processes and found that PUI with NaOCl was more effective than PUI with water and syringe irrigation with NaOCl.