Effectiveness of XP-endo Finisher R and xilol for gutapercha removal from root canal

Abstract

INTRODUCTION: During endodontic retreatment, gutta-percha removal is essential to achieve an acceptable
cleaning and shaping of the root canal. The D-Race/I Race and XP-endo Finisher R (FKG) mechanized
instruments are used for gutapercha removal.

OBJECTIVES: To compare, ex vivo, the removal of gutta-percha from the root canal with the D-Race/I Race
system, with that obtained with the supplementary instrument XP-endo Finisher R and xilol, in premolars.
MATERIAL AND METHODS: Ten premolars, with a single root canal, filled with gutta-percha and AH26
sealer were used for this study. For gutta-percha removal, the sample was divided into Group A: without xilol
and Group B: with xilol. The D-Race/I Race system were used and the root canals were irrigated with sodium
hypochlorite. Finally, XP-endo Finisher R was used. Three radiographs were taken: the first, with the filling of
the root canal; the second after using D-Race/I Race and the third, after XP-endo Finisher R instrumentation.
Radiopaque areas of the canal were measured with Image Pro-Plus v6 Software. Data was evaluated using
variance analysis with repeated measurements (ANOVA-MR). In all cases the significance level will be p<0.05.
RESULTS: D-Race/I Race system removed 51.6% of gutta-percha from the root canal and XP-endo Finisher
R 69.4%, increasing the removal of gutta-percha up to 55,5% and 83,3% respectively, when xilol was used.
The difference was statistically significant (p < 0,05).
CONCLUSIONS: The use of xilol and the supplementary file XP-endo Finisher R in the final stage of
endodontic retreatment increased the removal of gutta-percha from the root canal of premolars.