3D Analysis of D-RaCe and Self-Adjusting File in Removing Filling Materials from Curved Root Canals Instrumented and Filled with Different Techniques

• Published in: TheScientificWorld 2014-01, Vol.2014 (2014), p.1-7
• Main Authors: Bulut, Elçin Tekın, Er, Kursat, Keleş, Ali, Şımşek, Neslihan, Ahmetoglu, Fuat
• Format: Article
• Language: English
• Subjects: Analysis; Dental Instruments; Dental materials; Dental matrices; Dental Restoration, Permanent; Dentistry; Dentists; Equipment and supplies; Humans; Instrumentation; Methods; Properties; Root Canal Filling Materials; Root Canal Therapy; Studies; Teeth
• ISSN: 2356-6140; 1537-744X; 1537-744X
• DOI: 10.1155/2014/836513

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.