Basic Research| Volume 47, ISSUE 6, P970-975, June 2021

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Comparison of the Torsional Resistance of 4 Different Glide Path Instruments

Published:February 25, 2021DOI:



      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.


      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.


      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).


      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.

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        • Cheung G.S.
        • Liu C.S.
        A retrospective study of endodontic treatment outcome between nickel-titanium rotary and stainless steel hand filing techniques.
        J Endod. 2009; 35: 938-943
        • Cheung G.S.
        Instrument fracture: mechanisms, removal of fragments, and clinical outcomes.
        Endod Topics. 2009; 16: 1-26
        • Shen Y.
        • Cheung G.S.
        • Bian Z.
        • et al.
        Comparison of defects in ProFile and ProTaper systems after clinical use.
        J Endod. 2006; 32: 61-65
        • Sattapan B.
        • Nervo G.J.
        • Palamara J.E.
        • et al.
        Defects in rotary nickel-titanium files after clinical use.
        J Endod. 2000; 26: 161-165
        • West J.D.
        The endodontic Glidepath: “secret to rotary safety”.
        Dent Today. 2010; 29: 86-88
        • Ruddle C.J.
        • Machtou P.
        • West J.D.
        Endodontic canal preparation: innovations in glide path management and shaping canals.
        Dent Today. 2014; 33: 118-123
        • Hartmann R.C.
        • Peters O.A.
        • De Figueiredo J.A.
        • Rossi-Fedele G.
        Association of manual or engine-driven glide path preparation with canal centring and apical transportation: a systematic review.
        Int Endod J. 2018; 51: 1239-1252
        • Gambarini G.
        • Plotino G.
        • Sannino G.
        • et al.
        Cyclic fatigue of instruments for endodontic glide path.
        Odontology. 2015; 103: 56-60
        • Pasqualini D.
        • Mollo L.
        • Scotti N.
        • et al.
        Postoperative pain after manual and mechanical glide path: a randomized clinical trial.
        J Endod. 2012; 38: 32-36
        • Patino P.V.
        • Biedma B.M.
        • Liebana C.R.
        • et al.
        The influence of a manual glide path on the separation rate of NiTi rotary instruments.
        J Endod. 2005; 31: 114-116
        • De-Deus G.
        • Belladonna F.G.
        • Souza E.M.
        • et al.
        Scouting ability of 4 pathfinding instruments in moderately curved molar canals.
        J Endod. 2016; 42: 1540-1544
        • Elnaghy A.M.
        • Elsaka S.E.
        Evaluation of the mechanical behaviour of PathFile and ProGlider pathfinding nickel-titanium rotary instruments.
        Int Endod J. 2015; 48: 894-901
        • Nakagawa R.K.
        • Alves J.L.
        • Buono V.T.
        • et al.
        Flexibility and torsional behaviour of rotary nickel-titanium PathFile, RaCe ISO 10, Scout RaCe and stainless steel K-File hand instruments.
        Int Endod J. 2014; 47: 290-297
        • Keskin C.
        • Inan U.
        • Demiral M.
        • et al.
        Cyclic fatigue resistance of R-Pilot, WaveOne Gold Glider, and ProGlider glide path instruments.
        Clin Oral Investig. 2018; 22: 3007-3012
        • Ertugrul I.F.
        • Orhan E.O.
        Cyclic fatigue and energy-dispersive X-ray spectroscopy examination of the novel ROTATE instrument.
        Microsc Res Tech. 2019; 82: 2042-2048
        • Orhan E.O.
        • Ertuğrul İ.F.
        • Tosun S.
        Monotonic torsional resistance and fatigue resistance of novel SCOPE RS instruments.
        Microsc Res Tech. 2021; 84: 62-70
        • Keskin C.
        • Sivas Yilmaz Ö.
        • Keleş A.
        • İnan U.
        Comparison of cyclic fatigue resistance of Rotate instrument with reciprocating and continuous rotary nickel-titanium instruments at body temperature in relation to their transformation temperatures.
        Clin Oral Investig. 2021; 25: 151-157
        • American Dental Association Council on Dental Materials
        Instruments and equipment. Revised American National Standards Institute/American Dental Association specification no. 28 for root canal files and reamers, type K (revised 2008).
        American Dental Association, Chicago, IL2008
        • Peters O.A.
        Current challenges and concepts in the preparation of root canal systems: a review.
        J Endod. 2004; 30: 559-567
        • Peters O.A.
        • Paque F.
        Current developments in rotary root canal instrument technology and clinical use: a review.
        Quintessence Int. 2010; 41: 479-488
        • Plotino G.
        • Grande N.M.
        • Cordaro M.
        • et al.
        A review of cyclic fatigue testing of nickel-titanium rotary instruments.
        J Endod. 2009; 35: 1469-1476
        • Kim H.C.
        • Kwak S.W.
        • Cheung G.S.
        • et al.
        Cyclic fatigue and torsional resistance of two new nickel-titanium instruments used in reciprocation motion: Reciproc versus WaveOne.
        J Endod. 2012; 38: 541-544
        • Pedulla E.
        • Lo Savio F.
        • Boninelli S.
        • et al.
        Torsional and cyclic fatigue resistance of a new nickel-titanium instrument manufactured by electrical discharge machining.
        J Endod. 2016; 42: 156-159
        • Lopes H.P.
        • Gambarra-Soares T.
        • Elias C.N.
        • et al.
        Comparison of the mechanical properties of rotary instruments made of conventional nickel-titanium wire, M-wire, or nickel-titanium alloy in R-phase.
        J Endod. 2013; 39: 516-520
        • Bahia M.G.
        • Melo M.C.
        • Buono V.T.
        Influence of simulated clinical use on the torsional behavior of nickel-titanium rotary endodontic instruments.
        Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006; 101: 675-680
        • Capar I.D.
        • Kaval M.E.
        • Ertas H.
        • et al.
        Comparison of the cyclic fatigue resistance of 5 different rotary pathfinding instruments made of conventional nickel-titanium wire, M-wire, and controlled memory wire.
        J Endod. 2015; 41: 535-538
        • Arias A.
        • Singh R.
        • Peters O.A.
        Differences in torsional performance of single- and multiple-instrument rotary systems for glide path preparation.
        Odontology. 2016; 104: 192-198
        • Zupanc J.
        • Vahdat-Pajouh N.
        • Schafer E.
        New thermomechanically treated NiTi alloys - a review.
        Int Endod J. 2018; 51: 1088-1103
        • Inan U.
        • Keskin C.
        Torsional resistance of ProGlider, Hyflex EDM, and One G glide path instruments.
        J Endod. 2019; 45: 1253-1257
        • Alcalde M.P.
        • Duarte M.A.
        • Bramante C.M.
        • et al.
        Torsional fatigue resistance of pathfinding instruments manufactured from several nickel-titanium alloys.
        Int Endod J. 2018; 51: 697-704
        • Silva E.
        • Hecksher F.
        • Antunes H.D.
        • et al.
        Torsional fatigue resistance of blue-treated reciprocating instruments.
        J Endod. 2018; 44: 1038-1041
        • De-Deus G.
        • Silva E.J.
        • Vieira V.T.
        • et al.
        Blue thermomechanical treatment optimizes fatigue resistance and flexibility of the Reciproc files.
        J Endod. 2017; 43: 462-466
        • Seto B.G.
        • Nicholls J.I.
        • Harrington G.W.
        Torsional properties of twisted and machined endodontic files.
        J Endod. 1990; 16: 355-360
        • Kell T.
        • Azarpazhooh A.
        • Peters O.A.
        • et al.
        Torsional profiles of new and used 20/.06 GT series X and GT rotary endodontic instruments.
        J Endod. 2009; 35: 1278-1281
        • Lopes H.P.
        • Elias C.N.
        • Amaral G.
        • et al.
        Torsional properties of pathfinding instruments.
        Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011; 112: 667-670