Effect of Finisher Gentlefile brush, XP-endo Finisher and ultrasonic irrigation for the removal of calcium hydroxide paste from root canal

Eliminating residual calcium hydroxide [Ca(OH)2] intracanal medicament from the walls of a root canal presents a persistent obstacle that can impede the establishment of a proper fluid-tight seal during obturation. The effective removal of these medicaments from the canal walls has consistently posed a significant challenge. Consequently, several systems have been developed and assessed in order to address this issue. Therefore, it is of interest to compare the efficacy of Finisher Gentlefile Brush, XP-endo Finisher and Passive Ultrasonic Irrigation (PUI) on the removal of an oil-based Ca(OH)2 paste. 60 human mandibular extracted premolars were selected and underwent preparation with Pro Taper Gold rotary file system till size F5. The canals were dried and filled with Metapex and stored for a week. Further, the specimens were divided into 3 groups depending upon the Metapex removal protocols, namely, Finisher Gentlefile Brush, XP-endo Finisher, and PUI. Afterward, the specimens were sectioned buccolingually. Evaluation of remnants was done with a scoring system under a dental microscope at 25x magnification. The data was analyzed using the Chi-square test (p