The XP-endo Finisher is newly introduced NiTi file to improve efficacy of final irrigation procedure. The canal must be shaped at least ISO 25 file to use XP-endo Finisher. The instrument is stabile in martensite form at room temperature and can be bent to the desired shape. The instrument changes its phase to austenite when the temperature reaches the body temperature3,29. We believe that only one study31 compared the effectiveness of the XP-endo Finisher on CH removal. In contrast to our findings, Wigler, et al.31 (2016) reported that no significant difference was found between PUI and XP-endo Finisher on the removal of CH from simulated irregularities in the apical third of root canals. However, previous studies showed its superior debris removal ability from the root canal walls3,20.