Torsional Resistance of Three ProTaper Rotary Systems

Overview

Journal BMC Oral Health

Publisher Biomed Central

Specialty Dentistry

Date 2019 Jun 23

PMID 31226984

Citations 6

Authors

Abdullah Alqedairi

Hussam Alfawaz

Bader Abualjadayel

Mohammad Alanazi

Ahmad Alkhalifah

Ahmed Jamleh

Affiliations

Soon will be listed here.

Abstract

Background: The aim of this study is to compare the torsional resistance of the available ProTaper rotary systems, namely, ProTaper Universal (PTU), ProTaper Next (PTN), and ProTaper Gold (PTG).

Methods: A total of 195 files from the three systems distributed into 13 groups (PTU-S1, PTU-S2, PTU-F1, PTU-F2, PTU-F3, PTG-S1, PTG-S2, PTG-F1, PTG-F2, PTG-F3, PTN-X1, PTN-X2 and PTN-X3) were subjected to torsional fatigue until failure. The torsional test was performed according to ISO 3630-1, where each file was placed in a straight position to eliminate the influence of cyclic fatigue. The Kruskal-Wallis test was conducted to compare the mean maximum torques and angular deflections at fracture for the groups, and the Mann-Whitney test was performed for pairwise comparisons. The significance level was set at 0.05 and the fractured surfaces were examined under a scanning electron microscope.

Result: Among the tested files, PTG-S1 had the lowest torsional fatigue resistance, whereas PTU-F2 and PTU-F3 had the highest torsional resistance. The scanning electron microscope showed typical features of torsional failure.

Conclusion: The new ProTaper systems (PTG and PTN) did not show improved torsional resistance in comparison with PTU.

Citing Articles

Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel-Titanium Instruments.

Omori S, Ebihara A, Hirano K, Kasuga Y, Unno H, Nakatsukasa T Materials (Basel). 2022; 15(19).

PMID: 36234189 PMC: 9571549. DOI: 10.3390/ma15196850.

Radiographic assessment of endodontic mishaps in an undergraduate student clinic: a 2-year retrospective study.

Matoug-Elwerfelli M, Abdou A, Almutairi W, Alhuthayli M, Aloyaynaa S, Almohareb R PeerJ. 2022; 10:e13858.

PMID: 35945941 PMC: 9357366. DOI: 10.7717/peerj.13858.

Effect of NaOCl and EDTA irrigating solutions on the cyclic fatigue resistance of EdgeTaper Platinum instruments.

Alfawaz H, Alqedairi A, Alhamdan M, Alkhzim N, Alfarraj S, Jamleh A BMC Oral Health. 2022; 22(1):195.

PMID: 35599316 PMC: 9125847. DOI: 10.1186/s12903-022-02215-0.

Design, Metallurgical Features, and Mechanical Behaviour of NiTi Endodontic Instruments from Five Different Heat-Treated Rotary Systems.

Martins J, Silva E, Marques D, Rito Pereira M, Vieira V, Arantes-Oliveira S Materials (Basel). 2022; 15(3).

PMID: 35160955 PMC: 8840527. DOI: 10.3390/ma15031009.

Evidence for reduced torsional resistance of rotary files under curved position.

Jamleh A, Almedlej R, Alomar R, Almayouf N, Alfadley A, Alfouzan K Saudi Dent J. 2021; 33(7):614-619.

PMID: 34803309 PMC: 8589599. DOI: 10.1016/j.sdentj.2020.07.005.

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