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. 2024 Feb 22:21:12.
eCollection 2024.

Evaluation of apical transportation and centering ability of three single-file systems in severely curved canals using micro-computed tomography

Seyed Mohsen Hasheminia  1 , Samaneh Soltani  2 , Fateme Mohamadian  3 , Masoud Saatchi  4 , Seyed Mohsen Sadeghi  5
Affiliations

Evaluation of apical transportation and centering ability of three single-file systems in severely curved canals using micro-computed tomography

Seyed Mohsen Hasheminia et al. Dent Res J (Isfahan). .

Abstract

Background: This study aimed to compare the apical transportation and centering ability of One Curve, HyFlex EDM, and EdgeFile X1 in curved mesiobuccal and mesiolingual canals of mandibular first molars.

Materials and methods: In this in vitro experimental study, 60 mesiobuccal and mesiolingual canals of the mandibular first molars with a minimum length of 19 mm and 25°-40° curvature were randomly divided into three groups (n = 20) for root canal preparation with One Curve, HyFlex EDM, and EdgeFile X1. After access cavity preparation and confirming the glide path, the baseline micro-computed tomography (micro-CT) scans were obtained, and the root canals were instrumented with the respective systems according to the manufacturers' instructions. Apical transportation and centering ability were assessed at 1, 3, 5, and 7 mm from the apex by comparing pre- and postinstrumentation micro-CT scans. One-way ANOVA, independent t-test, and Duncan's post hoc test were used to statistically compare the groups, and data were analyzed by SPSS version 24 (alpha = 0.05).

Results: The three groups were not significantly different regarding apical transportation at 5 and 7 mm from the apex (P > 0.05). At 1 mm level, One Curve caused significantly lower apical transportation; while, at 3 mm level, HyFlex EDM resulted in significantly higher apical transportation (P < 0.05). No significant difference was noted in the centering ability of the three groups at 1, 3, and 5 mm from the apex (P > 0.05). At 7 mm level, EdgeFile X1 showed significantly lower centering ability (P < 0.05).

Conclusion: One Curve caused lower canal transportation in the apical third compared with EdgeFile and HyFlex EDM, but no significant difference was noted among the three in the coronal third of the roots.

Keywords: Root canal preparation; X-ray microtomography; root canal therapy.

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Conflict of interest statement

The authors of this manuscript declare that they have no conflicts of interest, real or perceived, financial or non-financial in this article.

Figures

Figure 1
Figure 1
Micro-computed tomography scans of mesiobuccal and mesiolingual canal orifices before (left) and after (right) root canal preparation.
Figure 2
Figure 2
Micro-computed tomography scans of mesiobuccal and mesiolingual canal orifices before (left) and after (right) root canal preparation after applying the “Find Edges” filter in ImageJ software.
Figure 3
Figure 3
Measurement of a1, a2, b1, and b2 for the calculation of apical transportation and centering ability at 7 mm from the apex.
Diagram 1
Diagram 1
The mean centering ability at different levels from the apex in the three groups.
See this image and copyright information in PMC

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