Supplementary solvent irrigation efficacy on filling remnants removal comparing XP-endo Finisher R vs IrriSafe

Abstract

This study aimed to compare the efcacy of XP-endo Finisher R and IrriSafe, with a solvent mixture of Methyl ethyl ketone/Tetrachloroethylene (MEK/TCE), in the removal of root flling residues. Twentyfour human mandibular incisors were pair-matched by micro-computed tomography according to volume and aspect ratio. After retreatment, specimens were allocated to two experimental groups (n= 12), according to the supplementary instrument used. The volume of residual flling material after each irrigating step and the time for retreatment was calculated. Statistical analyses were carried out using Mann–Whitney test, with a signifcance level of 5%. The volume of initial root canal flling material between the groups was similar (p> 0.05). With the fnal irrigation protocol (NaOCl and EDTA) the volume of the flling remnants decreased signifcantly (p< 0.05) with no diferences between IrriSafe or XP-endo Finisher R (p> 0.05). The additional solvent mixture MEK/TCE increased the efciency of flling materials reduction, regardless of the agitating instruments employed, IrriSafe or XP-endo Finisher R (p< 0.05). There was no diference between the two groups regarding the time (p= 0.149). Both supplementary instruments were efective in the reduction of flling remnants. The additional step with a solvent mixture of MEK/TCE enabled a total recovery of patency and the achievement of cleaner canals, independently of the agitation instrument.