Finite element analysis of rotary nickel‐titanium endodontic instruments: A critical review of the methodology

2021 ◽  
Author(s):  
Philip Y‐H Chien ◽  
Laurence J Walsh ◽  
Ove A Peters
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Critical Review ◽  
Nickel Titanium ◽  
Element Analysis

A PARADIGM SHIFT FOR TORSIONAL STIFFNESS OF NICKEL-TITANIUM ROTARY INSTRUMENTS: A FINITE ELEMENT ANALYSIS.

2021 ◽  
Author(s):  
Zanza Alessio ◽  
Seracchiani Marco ◽  
Di Nardo Dario ◽  
Reda Rodolfo ◽  
Gambarini Gianluca ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Paradigm Shift ◽  
Nickel Titanium ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rotary Instruments

scholarly journals Finite element analysis comparing WaveOne Gold and ProTaper Next endodontic file segments subjected to bending and torsional load

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Amira Galal Ismail ◽  
Mohamed Hussein Abdelfattah Zaazou ◽  
Manar Galal ◽  
Nada Omar Mostafa Kamel ◽  
Mohamed Abdulla Nassar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Clinical Situation ◽  
Nickel Titanium ◽  
Behavioral Differences ◽  
Element Analysis ◽  
Torsional Resistance ◽  
Computer Tomography Scanning ◽  
Cantilever Bending

Abstract Background The objective of this study was to assess the bending and torsional properties of two nickel-titanium endodontic files with equivalent sizes and various designs and alloys using finite element analysis, ProTaper Next®X2 (PTN) size 25 with 0.06 taper and WaveOne Gold® (WOG) primary size 25 with 0.07 taper. Methodology Two-dimensional models of the two files PTN and WOG were created using computer tomography scanning and stereomicroscope to produce a three-dimensional digital model. Instrument behavior under bending or torsional conditions was numerically analyzed in SolidWorks software package. Result ProTaper Next® revealed higher flexibility than WaveOne Gold® when exposed to cantilever bending but showed higher stress accumulation than WOG. In terms of torsional resistance, PTN also revealed higher torsional resistance than WOG. Conclusion The geometry of the instrument, thermomechanical treatment of the alloy, and its composition affect the mechanical behavior (bending and torsion) of nickel titanium rotary files. Hence, being aware of these behavioral differences, each clinician will be able to use the adequate file according to the clinical situation in addition to the manufacturer’s instructions.

Comparison of the Mechanical Behavior between Controlled Memory and Superelastic Nickel-Titanium Files via Finite Element Analysis

2013 ◽  
Vol 39 (11) ◽  
pp. 1444-1447 ◽  
Author(s):  
Leandro de Arruda Santos ◽  
Maria Guiomar de Azevedo Bahia ◽  
Estevam Barbosa de Las Casas ◽  
Vicente Tadeu Lopes Buono
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Nickel Titanium ◽  
Element Analysis

Stress distribution in rotary nickel titanium instruments - a finite element analysis

2007 ◽  
Vol 10 (4) ◽  
pp. 112 ◽  
Author(s):  
Vinoo Subramaniam ◽  
R Indira ◽  
MR Srinivasan ◽  
P Shankar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Nickel Titanium ◽  
Element Analysis

Comparative Evaluation of Stress Distribution in Experimentally Designed Nickel-titanium Rotary Files with Varying Cross Sections: A Finite Element Analysis

2018 ◽  
Vol 44 (4) ◽  
pp. 654-658 ◽  
Author(s):  
Shadir Bughari Basheer Ahamed ◽  
Purushothaman Pranav Vanajassun ◽  
Kothandaraman Rajkumar ◽  
Sekar Mahalaxmi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Cross Sections ◽  
Comparative Evaluation ◽  
Nickel Titanium ◽  
Element Analysis

Fatigue Behavior of Ni-Ti Alloy Endodontic Files under Ultrasonic Unconstrained Condition

2009 ◽  
Vol 417-418 ◽  
pp. 77-80
Author(s):  
Hui Min Zhou ◽  
Qing Fen Li ◽  
Yu Feng Zheng ◽  
Li Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Fatigue Cracks ◽  
Nickel Titanium ◽  
Experimental Results ◽  
Secondary Phases ◽  
Element Analysis ◽  
Ultrasonic Fatigue

Nickel-titanium alloy are extensively used in engineering and biomedical fields for their excellent properties of shape-memory, super-elasticity and biocompatibility. Their fatigue performance has been attracted increasingly attention, because they are often used under cyclic conditions. In this paper, the ultrasonic fatigue behavior of nickel-titanium endodontic files under unconstrained condition has been studied using the self-designed ultrasonic fatigue testing equipment. The vibration and harmonious response properties of nickel-titanium endodontic files are also analyzed using finite element method. Experimental results show that the average ultrasonic fatigue life of nickel-titanium endodontic files under unconstrained conditions is more than 108. Fracture of the files always occurred at the position about 2 -3 mm near the file tip. Results of finite element analysis show that the maximum stress of the nickel-titanium endodontic files located at the position about 2 -3 mm near the file tip, where is prone to generate fatigue cracks. The results of finite element analysis are consistent with the experimental results. The scanning electronic microscope (SEM) results show that the ultrasonic fatigue cracks always initiated at the surfaces of the files, where the secondary phases or impurities existed and induced fatigue cracks under repeated stress.

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