https://doi.org/10.32067/GIE.2024.38.01.02
Apical transportation and surface characteristics of thermally-treated reciprocating instruments after endodontic reintervention
Changes after reintervention
Accepted: 24 January 2024
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Aim: To evaluate the apical transportation and surface characteristics of two thermally-treated reciprocating instruments after endodontic reintervention.
Methodology: Images of 42 resin blocks containing simulated canals were obtained. After instrumentation (WaveOne Gold Primary - 25.07), the simulated canals were obturated and new images were obtained. The blocks were distributed into two groups (n=21), WaveOne Gold (Medium - 35.06) and Reciproc Blue (R40 - 40.06). Each instrument was used for filling material removal and re-instrumentation of three simulated canals. After reintervention, new images of the blocks were obtained and superimposed on the initial ones to calculate the apical transportation. The surface characteristics of the instruments before and after continuous use were performed under [Scanning Electron Microscope (SEM)]. The Kruskal-Wallis test was applied to the data and complemented by Dunn's multiple comparison test (p<0.05).
Results: Both systems had similar apical transportation values, with no significant difference (p>0.05). WaveOne Gold with no use and after the first use showed a greater number of defects than Reciproc Blue with no use and after two uses (p<0.001). Reciproc Blue had a significant increase in the number of defects after the third use (p<0.001).
Conclusions: WaveOne Gold and Reciproc Blue systems provided minimal and similar apical transportation. The number of defects was greater for the WaveOne Gold system, which increased after endodontic reintervention.
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