title: 3D analysis of D-RaCe and self-adjusting file in removing filling materials from curved root canals instrumented and filled with different techniques.
abstract: The aim of this study was to compare the efficacy of D-RaCe files and a self-adjusting file (SAF) system in removing filling material from curved root canals instrumented and filled with different techniques by using microcomputed tomography (micro-CT). The mesial roots of 20 extracted mandibular first molars were used. Root canals (mesiobuccal and mesiolingual) were instrumented with SAF or Revo-S. The canals were then filled with gutta-percha and AH Plus sealer using cold lateral compaction or thermoplasticized injectable techniques. The root fillings were first removed with D-RaCe (Step 1), followed by Step 2, in which a SAF system was used to remove the residual fillings in all groups. Micro-CT scans were used to measure the volume of residual filling after root canal filling, reinstrumentation with D-RaCe (Step 1), and reinstrumentation with SAF (Step 2). Data were analyzed using Wilcoxon and Kruskal-Wallis tests. There were no statistically significant differences between filling techniques in the canals instrumented with SAF (P = 0.292) and Revo-S (P = 0.306). The amount of remaining filling material was similar in all groups (P = 0.363); all of the instrumentation techniques left filling residue inside the canals. However, the additional use of SAF was more effective than using D-RaCe alone.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Inonu University, 44280 Malatya, Turkey.
authors.forename: Neslihan
authors.initials: N
authors.lastname: Simsek
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Inonu University, 44280 Malatya, Turkey.
authors.forename: Fuat
authors.initials: F
authors.lastname: Ahmetoglu
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Inonu University, 44280 Malatya, Turkey.
authors.forename: Ali
authors.identifier: 0000-0002-6834-4307
authors.initials: A
authors.lastname: Keles
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Inonu University, 44280 Malatya, Turkey.
authors.forename: Elcin Tekin
authors.initials: ET
authors.lastname: Bulut
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Akdeniz University, 07058 Antalya, Turkey.
authors.forename: Kursat
authors.initials: K
authors.lastname: Er
mesh_terms: D003762:Dental Instruments; D003793:Dental Restoration, Permanent; D006801:Humans; D012387:Root Canal Filling Materials; D012390:Root Canal Therapy
chemical_list: D012387:Root Canal Filling Materials