Evaluation of the Quality of Canal Obturation Using the Continuous Wave Method after Shaping with Different NiTi Rotary Instruments by Micro-CT

Abstract

Objective The aim of this article was to evaluate the influence of mesial root canal preparation of mandibular molars with the reciprocal systems (RCP) and self-adjusting file (SAF) in the incidence of voids spaces in endodontic obturation performed by modified continuous wave compaction (MCWC) technique, through images obtained in micro-computed tomography (micro-CT).

Materials and Methods Mesial roots of 15 mandibular molars, with two independent root canals, were divided into three groups (n = 5/roots), according to the endodontic instrumentation strategy (RCP, SAF, and twisted file [TWF]). After the root canals (n = 10, for each instrumentation system) were filled with MCWC, images of each specimen were obtained by micro-CT followed by three-dimensional reconstruction. The percentage of voids was obtained (in mm³) in relation of the total volume, cervical–middle, and apical thirds.

Statistical Analysis The data obtained were submitted to statistical analysis by Kruskal–Wallis and Dunn tests (p < 0.05).

Results With respect to the total volume of root canal, TWF demonstrated a lower percentage in comparison to SAF (p < 0.05). No significant difference was obtained between TWF and RCP or RCP and SAF (p > 0.05). In the apical third, RCP showed a smaller percentage of voids when compared with SAF (p < 0.05); however, TWF demonstrated similarity with RCP and SAF (p > 0.05). The middle–cervical third exhibited no statistically difference between TWF and RCP or RCP and SAF (p > 0.05), whereas TWF was lower than SAF (p < 0.05).

Conclusion Root canal preparation of mesial root of mandibular molars with TWF provides a lower incidence of voids in the endodontic filling performed by MCWC.

Keywords

endodontic - X-ray Micro-CT - root canal filling - root canal preparation

Publikationsverlauf

Artikel online veröffentlicht:
30. Januar 2024

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