Multimethod Analysis of a Novel NiTi Rotary System: Cyclic Fatigue, Buckling Resistance, and Bending Tests
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.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. TN exhibited the highest buckling resistance, whereas speed significantly affected cyclic fatigue resistance, with SFB being the most resistant overall. TN demonstrated notable buckling resistance and flexibility.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.
Authors
- Samuel Nogueira Lima (ORCID: https://orcid.org/0000-0001-7152-9567)
- Víctor Talarico Leal Vieira (ORCID: https://orcid.org/0000-0001-6434-2622)
- Irís Nogueira Bincelli Seckler (ORCID: https://orcid.org/0000-0001-9355-8158)
- Adriana de Jesus Soares (ORCID: https://orcid.org/0000-0002-8078-1606)
- A. Rocha
- Marília Fagury Videira Marceliano‐Alves (ORCID: https://orcid.org/0000-0002-2917-5934)
- Wayne Martins Nascimento (ORCID: https://orcid.org/0000-0003-4201-4710)
- Marcos Frozoni (ORCID: https://orcid.org/0000-0001-8001-4063)
- Ana Grasiela da Silva Limoeiro (ORCID: https://orcid.org/0000-0003-4633-720X)
- Luís Cardoso Rasquin (ORCID: https://orcid.org/0000-0002-5797-9999)
- Bárbara Rebeca Alves (ORCID: https://orcid.org/0009-0009-0888-1942)
Institutions
- Universidade Federal da Bahia (BR)
- Universidade de São Paulo (BR)
- Universidade Estadual de Campinas (UNICAMP) (BR)
- Universidade Unigranrio (BR)
- Universidade Iguaçu (BR)
- Dr. D.Y. Patil Vidyapeeth, Pune (IN)
- Faculdade São Leopoldo Mandic (BR)
- Centro Universitário Maurício de Nassau (BR)
- Dr D Y Patil Dental College & Hospital (IN)
Publication Details
- Journal
- European Journal of Dentistry
- Published
- 2025-04-23
- DOI
- https://doi.org/10.1055/s-0045-1806949
- Citations
- 1
- Primary Topic
- Endodontics and Root Canal Treatments
- Type
- article
- Field-Weighted Citation Impact
- 1.79