Abstract
Introduction
The present study aimed to compare the torsional strength of the initial files of
the Mtwo (VDW, Munich, Germany) and novel Rotate systems (VDW, Munich, Germany) with
the ProGlider (Dentsply Sirona, Ballaigues, Switzerland) and R-Pilot (VDW) glide path
instruments.
Methods
The Mtwo (10/.04), ProGlider (16/.02), R-Pilot (12.5/.04), and Rotate (15/.04) glide
path files were compared regarding their torsional strength, which was tested using
a specially designed test device (N = 20). The data obtained were statistically analyzed at 5% significance level using
1-way analysis of variance and the post hoc Tukey test. The fragment surfaces and
separated instruments were examined with ×50, ×100, and ×1000 magnification under
a scanning electron microscope.
Results
The R-Pilot group showed the highest torsional strength value among all groups (P < .05), whereas there was no significant difference between the torsional strength
values of the Mtwo and ProGlider groups (P > .05). The Rotate group had the lowest torsional strength among all groups (P < .05). The Mtwo group showed the lowest angle of rotation among all groups (P < .05).
Conclusions
Although the R-Pilot glide path file exhibited the highest torsional strength in all
groups, Rotate showed the highest angle of rotation. Differences in torsional resistance
of the instruments may be associated with their manufacturing methods and design features.
Key Words
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Article info
Publication history
Published online: February 25, 2021
Identification
Copyright
© 2021 American Association of Endodontists.
