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DOI

10.1016/j.jds.2023.02.015

First Page

1598

Last Page

1603

Abstract

Abstract Background/purpose The glide path instruments are the introductory instruments into the canals; thus, they should be durable enough to withstand torsional stress/screw-in force. This study aimed to investigate the torque and screw-in force of TruNatomy Glider (TN), ProGLIDER (PG), Hyflex EDM (EDM) and Dent Craft RE (RE) glide path instruments in single- and double-curved canals. Materials and methods Each instrument brand was divided into two groups (n = 7 each) according to the canal configuration. Torque and screw-in force were recorded during automated instrumentation of simulated resin canals with XSmart IQ cordless motor after the canal patency was checked with a #10 K-file. The values were statistically analyzed using the Kolmogorov-Smirnov test followed by the Kruskal Wallis test and the Mann-Whitney U test with Bonferroni correction ( α = 0.05). Results TN produced significantly higher torque than RE in single-curved canals and PG in double-curved canals ( P < 0.05). EDM yielded significantly higher screw-in force than TN and RE in single-curved canals ( P < 0.05), but there was no significant difference in double-curved canals ( P > 0.05). A significant effect of different canal configurations was only detected for screw-in force in EDM ( P < 0.05). Conclusion TN in single-curved canals and RE in double-curved canals yielded higher torque values, while EDM exhibited greater screw-in force in both canal configurations. No effect of different canal configurations was detected for torque, but a significant impact was detected for screw-in force in EDM.

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