Abstract
BackgroundShaping ability of a file plays an important role during instrumentation in an endodontic treatment. This study aimed to compare the shaping ability of OneShape (OS), Hero Shaper (HS), and Revo-S (RS) instruments in simulated L-shaped canals.MethodsForty-eight simulated L-shaped canals were prepared to an apical size of 25 using OS, HS, and RS (all from Micro-Mega SA, Besançon, France), (n = 16 canals/group) systems. The amount of resin removed after each canal's preparation was measured and compared after producing a composite image made from the superimposition of pre and post-instrumented canals. Canal aberrations and the preparation time were also recorded. The data were statistically analysed by using ANOVA, Tukey, and Chi-square tests.ResultsOne file fractured during instrumentation in the RS group. A significant difference was found at the apical end of the prepared simulated canal between the groups, with RS showing the least amount of resin removal from the inner side of the canals and HS showing the highest amount of resin removal from the outer side (P < 0.05). Regarding the total width of the canals after preparation, a significant difference was found between the groups at the apical end and the straight portion of the canals, and RS removed the least amount of resin at the straight portion of the canals (P < 0.05). No statistically significant differences were found between the different instruments regarding canal aberrations' incidence (P > 0.05).ConclusionsAll of the files showed a tendency to straighten the canals, whereas OS files maintained the original canal curvatures well.
Highlights
Shaping ability of a file plays an important role during instrumentation in an endodontic treatment
The OneShape (OS; Micro Méga, Besançon, France) is a single-file canal preparation system made of conventional NiTi alloy that works on full clock rotation
Simulated canals Forty-eight simulated L-shaped canals were used in this study (Endo Training Block-S; Dentsply Maillefer, Ballaigues, Switzerland, with 0.02 taper, 0.15 mm apical diameter, 17 mm length, and 40 curvature)
Summary
Shaping ability of a file plays an important role during instrumentation in an endodontic treatment. The OneShape (OS; Micro Méga, Besançon, France) is a single-file canal preparation system made of conventional NiTi alloy that works on full clock rotation. This system was introduced to the market after two reciprocating single-file systems named WaveOne (Dentsply Maillefer, Ballaigues, Switzerland) and Reciproc (VDW, Vakili‐Gilani et al BMC Oral Health (2021) 21:378. The OS file has a tip size of 25 and a constant taper of 0.06 with different cross-sections along its length, changing from S-shaped to concave triangular shape near the tip This system requires only one file working in a clockwise rotation to prepare the canals up to the apical size of 25. The file has features such as Anti Breakage Control (ABC) and asymmetric file design, which is claimed by the manufacture to increase the safety of the system [5]
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