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. 2020 Feb;14(1):70-76.
doi: 10.1055/s-0040-1701393. Epub 2020 Jan 31.

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

Mohamed Mohamed Elashiry  1   2 , Shehab Eldin Saber  2   3 , Salma Hasan Elashry  2   4
Affiliations

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

Mohamed Mohamed Elashiry et al. Eur J Dent. 2020 Feb.

Abstract

Objectives: To evaluate the shaping ability of four different single-file systems using micro-computed tomography (micro-CT).

Materials and methods: Eighty mesiobuccal and mesiolingual canals of permanent mandibular molars were randomly assigned to four groups according to the file used; WaveOne Gold, RECIPROC Blue, HyFlex EDM, and One Shape (n = 20). The samples were scanned using micro-CT for the preinstrumentation record; then the canals were instrumented and scanned for the postinstrumentation records.

Statistical analysis: The data were then analyzed statistically using one-way analysis of variance (ANOVA) with the level of significance set at α = 0.05.

Results: The results of canal centering ratio and canal transportation showed that no significant difference was found among the four file groups at the middle and the coronal levels. However, a significant difference was found at the apical level (p < 0.05), where WaveOne Gold showed the best centering ratio and the least amount of canal transportation. The change in the canal volume was significant at the coronal level (p < 0.05), whereas the change in the canal volume was higher for the HyFlex EDM group than the other groups. No significant difference was found between the other groups at the apical level, middle level, or in the total percentage of canal volume.

Conclusion: WaveOne Gold produced a more centralized canal preparation with a lesser amount of transportation at the apical level. HyFlex EDM showed the highest canal volumetric change at the coronal level. The interim design of the endodontic files has a high impact on the behavior of the file inside the root canal.

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Conflict of interest statement

This work should be attributed to Dental College of Georgia, Augusta University, Georgia, United States.All authors have contributed significantly and are in agreement with the manuscript.None declared.

Figures

Fig. 1
Fig. 1
Cross-sectional reconstructed images showing the measurements taken on the preinstrumentation and postinstrumentation images at the apical, middle, and coronal levels. On the figure: X denotes the shortest distance from the mesial aspect of the root to the periphery of the prepared canal. X’ denotes the shortest distance from the mesial aspect of the root to the periphery of the unprepared canal. The same for Y and Y’.
Fig. 2
Fig. 2
Cross-sectional reconstructed images showing the preinstrumentation, postinstrumentation, and the superimposed images at the three different canal levels. The red color in the superimposed images indicate the difference in the canal parameters after instrumentation.
Fig. 3
Fig. 3
Representative 3D reconstructed images showing the total canal volume; before instrumentation in red color, after instrumentation in green color, and the superimposed image of the pre- and postinstrumentation micro-CT images in two different views: buccal and mesial. 3D, three-dimensional; CT, computed tomography.
See this image and copyright information in PMC

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