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CC BY 4.0 · Eur J Dent
DOI: 10.1055/s-0045-1806949
Original Article

Multimethod Analysis of a Novel NiTi Rotary System: Cyclic Fatigue, Buckling Resistance, and Bending Tests

Alyne Rouse Rocha
1   Departamento de Endodontia, Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, São Paulo, Brazil
,
Ana Grasiela Limoeiro
2   Department of Dentistry, Endodontics and Dental Materials, Bauru Dental School, University of São Paulo, Bauru, Brazil
,
Iris Nogueira Seckler
1   Departamento de Endodontia, Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, São Paulo, Brazil
,
Bárbara Rebeca Alves 
1   Departamento de Endodontia, Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, São Paulo, Brazil
,
Adriana Jesus Soares
3   Department of Endodontics, Piracicaba School of Dentistry, State University of Campinas, Piracicaba, Brazil
,
Samuel Nogueira Lima
4   Department of Endodontics, Mário Juca University Center, Maceió, Alagoas, Brazil
,
Victor Talarico Vieira
5   Department of Endodontics, Grande Rio University (UnigranRio), Rio de Janeiro, Brazil
,
Marília Fagury Videira Marceliano-Alves 
6   Department of Endodontics, Post- Graduate Program in Dentistry, Nova Iguaçu, Brazil
7   Department of Endodontics, Maurício de Nassau University Centre (UNINASSAU), Rio de Janeiro, Brazil
8   Department of Dental Research Cell, Dr. D. Y. Patil Vidyapeeth, Pune, India
,
Wayne Martins Nascimento
1   Departamento de Endodontia, Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, São Paulo, Brazil
,
Luis Cardoso Rasquin
9   Department of Endodontics, Federal University of Bahia, Brazil
,
Marcos Frozoni
1   Departamento de Endodontia, Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, São Paulo, Brazil
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Abstract

Objective

Instruments are susceptible to deformation and/or fracture, which may represent a failure in endodontic treatment. This study assessed the mechanical properties of nickel-titanium rotary instruments through cyclic fatigue, buckling resistance, and 45° bending tests.

Material and Methods

One hundred and twenty rotary instruments were divided into three groups: Super Flexi Files Blue (SFB; 20/.04), TruNatomy Small (TN; 20/.04), and ProTaper Ultimate Shaper (PTU; 20/.04). They underwent cyclic fatigue tests at fixed and manufacturer-specified speeds, along with buckling and bending tests. SFB files exhibited the greatest cyclic fatigue resistance with the longest time to fracture and highest number of cycles to failure (NCF), followed by TN and PTU. For PTU and TN, reducing rotation speed increased time to fracture and NCF, while SFB showed reduced values with speed increase.

Results

TN exhibited the highest buckling resistance, whereas PTU had superior performance in the bending test. Rotation speed significantly affected cyclic fatigue resistance, with SFB being the most resistant overall. TN demonstrated notable buckling resistance and flexibility.

Conclusion

The rotational speed significantly affects the resistance of instruments to cyclic fatigue and that the SFB file is the most resistant file to cyclic fatigue. The TN file proved to be the most resistant and flexible.

Keywords

endodontic - bending strength - fracture - resistance

Authors' Contribution

Conceptualization: A.R., I.N.S., and M.F.; data curation: W.M.N., B.R.A., and A.G.L.; formal analysis: S.N.L., W.M.N., and A.G.L.; investigation: V.T.V., A.R., and M.F.; methodology: A.R., M.F., A.G.L., and W.M.N.; project administration: V.T.V., A.G.L., and W.M.N.; supervision: A.J.S., A.G.L. and W.M.N.; validation: all authors; visualization: all authors; writing—original draft: all authors; writing—review and editing: A.G.L. and M.F.




Publikationsverlauf

Artikel online veröffentlicht:
23. April 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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  • References

  • 1 Alcalde MP, Tanomaru-Filho M, Bramante CM. et al. Cyclic and torsional fatigue resistance of reciprocating single files manufactured by different nickel-titanium alloys. J Endod 2017; 43 (07) 1186-1191
    CrossrefPubMedSuche in Google Scholar
  • 2 Gündoğar M, Özyürek T. Cyclic fatigue resistance of OneShape, HyFlex EDM, WaveOne Gold, and Reciproc Blue nickel-titanium instruments. J Endod 2017; 43 (07) 1192-1196
    CrossrefPubMedSuche in Google Scholar
  • 3 Silva EJNL, Ajuz NC, Martins JNR. et al. Multimethod analysis of three rotary instruments produced by electric discharge machining technology. Int Endod J 2023; 56 (06) 775-785
    PubMedSuche in Google Scholar
  • 4 Özyürek T. Cyclic fatigue resistance of Reciproc, WaveOne, and WaveOne gold nickel-titanium instruments. J Endod 2016; 42 (10) 1536-1539
    PubMedSuche in Google Scholar
  • 5 Silva EJNL, Martins JNR, Ajuz NC. et al. Design, metallurgy, mechanical properties, and shaping ability of 3 heat-treated reciprocating systems: a multimethod investigation. Clin Oral Investig 2023; 27 (05) 2427-2436
    PubMedSuche in Google Scholar
  • 6 Lima SN. Guia dos Principais Sistemas Mecanizados. Endodontia [online] 2022; 1 (01) 1-112
    Suche in Google Scholar
  • 7 Martins JNR, Silva EJNL, Marques D. et al. Comparison of five rotary systems regarding design, metallurgy, mechanical performance, and canal preparation-a multimethod research. Clin Oral Investig 2022; 26 (03) 3299-3310
    CrossrefPubMedSuche in Google Scholar
  • 8 Mustafa M, Attur K, Bagda KK, Singh S, Oak A, Kathiria N. An appraisal on newer endodontic file systems: a narrative review. J Contemp Dent Pract 2022; 23 (09) 944-952
    PubMedSuche in Google Scholar
  • 9 Riyahi AM, Bashiri A, Alshahrani K, Alshahrani S, Alamri HM, Al-Sudani D. Cyclic fatigue comparison of TruNatomy, Twisted File, and ProTaper next rotary systems. Int J Dent 2020; 2020: 3190938
    PubMedSuche in Google Scholar
  • 10 Nagendrababu V, Murray PE, Ordinola-Zapata R. et al. PRILE 2021 guidelines for reporting laboratory studies in endodontology: a consensus-based development. Int Endod J 2021; 54 (09) 1482-1490
    PubMedSuche in Google Scholar
  • 11 Silva E, Oliveira de Lima C, Vieira V, Antunes H, Lima Moreira EJ, Versiani M. Cyclic fatigue and torsional resistance of four martensite-based nickel titanium reciprocating instruments. Eur Endod J 2020; 5 (03) 231-235
    PubMedSuche in Google Scholar
  • 12 ASTM. Standard Test Method for Tension Testing of Nickel-Titanium Superelastic Materials. West Conshohocken, PA, USA: ASTM; 2007: 1-3
    Suche in Google Scholar
  • 13 Martins JNR, Silva EJNL, Marques D. et al. Characterization of the file-specific heat-treated ProTaper Ultimate rotary system. Int Endod J 2023; 56 (04) 530-542
    PubMedSuche in Google Scholar
  • 14 Ali A, Gözen NU, Kul AKAK, Chhabra N. Stationary fatigue resistance of various rotary instruments with different alloys after preparing three root canals. Eur Endod J 2021; 6 (03) 278-283
    PubMedSuche in Google Scholar
  • 15 Chan WSS, Gulati K, Peters OA. Advancing Nitinol: from heat treatment to surface functionalization for nickel-titanium (NiTi) instruments in endodontics. Bioact Mater 2022; 22: 91-111
    PubMedSuche in Google Scholar
  • 16 Fukumori Y, Nishijyo M, Tokita D, Miyara K, Ebihara A, Okiji T. Comparative analysis of mechanical properties of differently tapered nickeltitanium endodontic rotary instruments. Dent Mater J 2018; 37 (04) 667-674
    PubMedSuche in Google Scholar
  • 17 Pedullà E, Franciosi G, Ounsi HF, Tricarico M, Rapisarda E, Grandini S. Cyclic fatigue resistance of nickel-titanium instruments after immersion in irrigant solutions with or without surfactants. J Endod 2014; 40 (08) 1245-1249
    PubMedSuche in Google Scholar
  • 18 Chien PYH, Martins JNR, Walsh LJ, Peters OA. Mechanical and metallurgical characterization of nickel-titanium wire types for rotary endodontic instrument manufacture. Materials (Basel) 2022; 15 (23) 8367
    PubMedSuche in Google Scholar
  • 19 De-Deus G, Silva EJNL, Vieira VTL. et al. Blue Thermomechanical treatment optimizes fatigue resistance and flexibility of the Reciproc files. J Endod 2017; 43 (03) 462-466
    CrossrefPubMedSuche in Google Scholar
  • 20 Martins JNR, Silva EJNL, Marques D. et al. Design, metallurgical features, and mechanical behaviour of NiTi Endodontic instruments from five different heat-treated rotary systems. Materials (Basel) 2022; 15 (03) 1009
    PubMedSuche in Google Scholar
  • 21 Moreira EJL, Silva EJNL, Belladonna FG, Maciel AC, Vieira VTL, De-Deus G. Mechanical performance of original; yellowish and blueish ProFile instruments: isolating heat-treatment as a variable. Braz Dent J 2022; 33 (04) 47-53
    PubMedSuche in Google Scholar
  • 22 Miccoli G, Seracchiani M, Del Giudice A. et al. Fatigue resistance of two nickel-titanium rotary instruments before and after ex vivo root canal treatment. J Contemp Dent Pract 2020; 21 (07) 728-732
    PubMedSuche in Google Scholar
  • 23 Elnaghy AM, Elsaka SE, Elshazli AH. Dynamic cyclic and torsional fatigue resistance of TruNatomy compared with different nickel-titanium rotary instruments. Aust Endod J 2020; 46 (02) 226-233
    PubMedSuche in Google Scholar
  • 24 Peters OA, Arias A, Choi A. Mechanical properties of a novel nickel-titanium root canal instrument: stationary and dynamic tests. J Endod 2020; 46 (07) 994-1001
    PubMedSuche in Google Scholar
  • 25 Gündoğar M, Uslu G, Özyürek T, Plotino G. Comparison of the cyclic fatigue resistance of VDW.ROTATE, TruNatomy, 2Shape, and HyFlex CM nickel-titanium rotary files at body temperature. Restor Dent Endod 2020; 45 (03) e37
    PubMedSuche in Google Scholar
  • 26 Lopes WSP, Vieira VTL, Silva EJNL. et al. Bending, buckling and torsional resistance of rotary and reciprocating glide path instruments. Int Endod J 2020; 53 (12) 1689-1695
    PubMedSuche in Google Scholar
  • 27 Pedullà E, Carlesi T, Pappalardo A. et al. Impact of pecking amplitude on cyclic fatigue of new nickel-titanium files. Clin Exp Dent Res 2024; 10 (01) e811
    PubMedSuche in Google Scholar
  • 28 Díaz-Flores García V, Pimienta Vázquez MI, Tejedor B, Suárez A, Freire Y. Comparative study of torsional and bending stress in NiTi, graphene, and GUM metal endodontic files by finite element analysis. Comput Biol Med 2024; 170: 108017
    PubMedSuche in Google Scholar
  • 29 Kasuga Y, Kimura S, Maki K. et al. Phase transformation and mechanical properties of heat-treated nickel-titanium rotary endodontic instruments at room and body temperatures. BMC Oral Health 2023; 23 (01) 825
    PubMedSuche in Google Scholar
  • 30 Silva EJNL, Martins JNR, Ajuz NC. et al. A multimethod assessment of a new customized heat-treated nickel-titanium rotary file system. Materials (Basel) 2022; 15 (15) 5288
    PubMedSuche in Google Scholar
  • 31 Gürler K, Yilmaz S, Dumani A, Yoldas O. Comparison of cyclic fatigue resistance of three different single-file systems after clinical use. BMC Oral Health 2024; 24 (01) 1482
    PubMedSuche in Google Scholar
  • 32 Greco K, Paolone G, Cicero G. et al. Cyclic fatigue resistance of four heat-treated nickel-titanium files in severely curved simulated canals: an in vitro study. J Clin Med 2024; 13 (19) 5739
    PubMedSuche in Google Scholar
  • 33 El-Anwar MI, Yousief SA, Kataia EM, El-Wahab TMA. Finite element study on continuous rotating versus reciprocating nickel-titanium instruments. Braz Dent J 2016; 27 (04) 436-441
    CrossrefPubMedSuche in Google Scholar
  • 34 Almohareb RA, Barakat RM, Basuhail HM. et al. Quality of life in patients with endodontically treated teeth: a retrospective study at an educational hospital. Healthcare (Basel) 2024; 12 (22) 2248
    PubMedSuche in Google Scholar