Abstract
The objective of this study was to evaluate the efficacy of reciprocating instruments in the removal of bioceramic and epoxy resin-based sealers using micro-CT analysis. Root canals of 40 extracted human teeth were instrumented with a size R25 Reciproc instrument. Specimens were randomly divided into two groups (n = 20) according to the root canal filling material. In the first group, root canals were obturated with AH Plus sealer and Reciproc R25 gutta-percha. In the second group, a combination of bioceramic gutta-percha (TotalFill BC) and bioceramic sealer (TotalFill BC) was used. After one week, the retreatment of all specimens was performed using Reciproc instruments. To analyze the differences in the filling remnants, specimens were scanned in a micro-CT device after obturation and after the retreatment procedure. Statistical analysis was performed using the Mann–Whitney U test (p < 0.05). A combination of bioceramic sealer and bioceramic gutta-percha was more effectively removed from canals using a reciprocating instrument, with a filling remnants volume of 4.01 ± 3.13 mm3, in comparison to the combination of epoxy resin-based sealer and gutta-percha (6.96 ± 2.70 mm3) (p < 0.05). A reciprocating instrument was more effective in removing bioceramic sealers than epoxy resin-based sealers, although none of the root canal filling materials were completely removed from the root canals.
Highlights
Published: 5 November 2021The main goal of endodontic treatment is thorough chemo-mechanical debridement and removal of any inflamed, necrotic, or infected tissue so that root canals can be shaped and filled, ensuring a hermetic seal and preventing reinfection of the endodontic space [1]
A reciprocating instrument was more effective in removing bioceramic sealers than epoxy resin-based sealers, none of the root canal filling materials were completely removed from the root canals
A combination of bioceramic and bioceramic gutta-percha wasset more removed from root canals using a reciprocating instrument, with a filling remnant volume of 4.01 ± 3.13 mm3, in comparison to a combination of epoxy resin-based sealer and guttapercha (6.96 ± 2.70 mm3 ), (Tables 2 and 3)
Summary
The main goal of endodontic treatment is thorough chemo-mechanical debridement and removal of any inflamed, necrotic, or infected tissue so that root canals can be shaped and filled, ensuring a hermetic seal and preventing reinfection of the endodontic space [1]. According to the available literature, endodontic treatment is fairly predictable, and the success of primary endodontic treatment ranges from 86% to 98% [2]. In cases of failure or inadequate endodontic treatment, root canal retreatment is indicated [3]. Root canal filling materials are removed from the root canals, followed by cleaning, shaping, and adequately obturating the endodontic space. According to one published review article, the success rate of endodontic retreatment is 78%, which is lower than the previously reported primary endodontic treatment success rate [7].a prospective study by [2] reported similar success rates for primary endodontic treatment (82.8%) and nonsurgical retreatment (80.1%) when the clinical procedures were
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