Influence of heat treated files on conserving the remaining dentin thickness during endodontic retreatment – An invitro CBCT study

Abstract

ObjectivesNon-surgical endodontic retreatment is to be a conservative option over endodontic surgery in case of recurrent infections. Root canal retreatment procedures needs to be initiated faster and proficiently with proper root canal retreatment files. The main aim of this study is to evaluate the remaining root dentin thickness post Gutta Percha (GP) retrieval from the root canal after using two different rotary instruments. Materials and methodsA total of sixty extracted single rooted teeth were chosen. Shaping and Cleaning was done Step Back (Telescopic) technique with apical preparation ofsize 40 k File. Irrigation was carried out using NaOCl (3 %)and Ethyelenediamine tetraacetic acid (EDTA) to clear the smear layer. The canals were dried using paper points and obturation was completed using lateral compaction technique with AH plus resin sealer. Upon completing the obturation, it was categorized into two groups: Group I- ProTaper retreatment files (PTR) and Group II- Solite RS3(S-RS3) Retreatment files. Cone Beam Computed Tomography (CBCT) was used to assess the remaining dentin thickness post gutta-percha retrieval at 3,5 and 7 mm respectively. To test the significance between groups independent t test was used. ResultsIt can be noted from the results that more amount of remaining dentin thickness was seen after using Solite RS3 files at 3 mm, 5 mm and 7 mm on the mesial side compared to ProTaper retreatment files (p < 0.05). There is no statistically significant difference seen between the files at three levels on the distal side (p > 0.05). ConclusionWithin the limitations of the study, it can be concluded that Solite RS3 files have the potential to preserve the remaining dentin thickness. However, more studies including various other parameters should be performed to arrive at a definitive conclusion.