The efficacy of three different file systems in removal of root filling residue that remains in oval root canal after the use of protaper retreatment files: An In vitro cone-beam computed tomography study

Abstract

Aims: The aim of this study is to evaluate the efficacy of supplementary file system in the removal of gutta-percha and sealer from the root canal system. Subjects and Methods: Forty-five oval single-rooted mandibular premolars were prepared up to size F2 (DENTSPLY ProTaper) and obturated with gutta-percha and sealer and randomly divided into Group I, Group II and Group III (n = 15). Each group was retreated with ProTaper retreatment files and then additionally retreated with Supplementary files, XP EndoFinisher R file, ProTaper F3 and F4 and WaveOne large, respectively. The cone-beam computed tomography scans were taken after obturation, during the first stage retreatment and second stage retreatment to compare the volume of root filling residue that remained after different stages of retreatment. Statistical Analysis Used: ANOVA and Tukey's multiple comparison tests were used to compare the data. Results: Group I exhibited least root canal residue (P 0.05). Conclusions: The ProTaper retreatment files, coupled with XP EndoFinisher R file, results in the better removal of the root canal fillings during endodontic retreatment procedure.

Keywords

• gutta-percha removal
• reciprocating
• root canal retreatment
• rotary
• xp endofinisher r file