Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files

Restorative Dentistry & Endodontics
E PedullàLuca Testarelli

Abstract

To evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental). One hundred and sixty new M3 Rotary and M3 Pro Gold files (sizes 20/0.04 and 25/0.04) were used. Torque and angle of rotation at failure (n = 20) were measured according to ISO 3630-1. Cyclic fatigue resistance was tested by measuring the number of cycles to failure in an artificial stainless steel canal (60° angle of curvature and a 5-mm radius). The metallurgical characteristics were investigated by differential scanning calorimetry. Data were analyzed using analysis of variance and the Student-Newman-Keuls test. Comparing the same size of the 2 different instruments, cyclic fatigue resistance was significantly higher in the M3 Pro Gold files than in the M3 Rotary files (p < 0.001). No significant difference was observed between the files in the maximum torque load, while a significantly higher angular rotation to fracture was observed for M3 Pro Gold (p < 0.05). In the DSC analysis, the M3 Pro Gold files showed one prominent peak on the heating curve and 2 prominent peaks on the cooling curve. In contrast, the M3 Rotary files showed 1 small peak on the heating curve and 1 small peak on the cooling c...Continue Reading

References

Feb 1, 1997·Journal of Endodontics·J P PruettD L Carnes
Mar 30, 2001·Advances in Dental Research·B Kasemo, J Gold
Jun 13, 2002·International Endodontic Journal·O A Peters, F Barbakow
Jul 23, 2005·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Maria Guiomar A Bahia, Vicente Tadeu Lopes Buono
Oct 24, 2006·Journal of Endodontics·Peter Parashos, Harold H Messer
Jul 16, 2010·Journal of Endodontics·Giulio GaviniCelso Luiz Caldeira
Jul 16, 2010·Journal of Endodontics·Su-Young ParkHyeon-Cheol Kim
Feb 19, 2011·Journal of Endodontics·Jiwan YumHyeon-Cheol Kim
Jun 22, 2011·Journal of Endodontics·Ya ShenMarkus Haapasalo
Oct 18, 2011·Journal of Endodontics·Ya ShenMarkus Haapasalo
Jan 25, 2012·International Endodontic Journal·G PlotinoG Gambarini
Dec 12, 2012·Journal of Endodontics·Elizabeth Ninan, David W Berzins
Feb 14, 2013·Journal of Endodontics·Jung-Hong HaHyeon-Cheol Kim
Sep 3, 2013·International Endodontic Journal·E PedullàE Rapisarda
Nov 28, 2013·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Gianlucca GambariniLuca Testarelli
Aug 26, 2014·Journal of Endodontics·Gianluca PlotinoGianluca Gambarini
Feb 26, 2016·Implant Dentistry·Bruno Ramos ChrcanovicAnn Wennerberg
Mar 20, 2016·Journal of Endodontics·Rafaela Andrade de VasconcelosOve A Peters
Dec 15, 2016·Bioinorganic Chemistry and Applications·JinWook ChoiSeokWoo Chang
Jan 31, 2017·Journal of Endodontics·Eugenio PedullàCarlos G Adorno

❮ Previous
Next ❯

Citations

May 28, 2019·International Endodontic Journal·E J N L SilvaH S Antunes
Feb 4, 2021·International Journal of Dentistry·Suhad Jabbar Hamed Al-NasrawiJulfikar Haider

❮ Previous
Next ❯

Methods Mentioned

BETA
differential scanning calorimetry
scanning electron microscopy

Software Mentioned

Power
AutoCAD
GraphPad
Prism

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.