Influence of simulated clinical use on the torsional behavior of nickel-titanium rotary endodontic instruments

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
Maria Guiomar Azevedo BahiaVicente Tadeu Lopes Buono

Abstract

The aim of this study was to assess the influence of cyclic deformation up to one half and three quarters of the fatigue life of NiTi rotary endodontic instruments on their behavior in torsion. Thirty sets of 0.04 and 0.06 ProFile instruments in sizes #20, #25, and #30 were randomly divided into 3 groups: 1 contained 10 sets of new files, torsion tested to failure, while the other 2 groups, with 10 sets each, were first submitted to fatigue tests of up to one half and three fourths of their fatigue life, respectively, in geometrical conditions similar to those of the clinical practice and then torsion tested for rupture. Statistical analysis of the values obtained for the torque to failure and maximum angular deflection, using the Student t test at the 95% confidence level, showed that the cyclic deformation of instruments of up to one half and three fourths of their fatigue life gives rise to a significant reduction in these parameters. The simulated clinical use of ProFile instruments for shaping curved canals adversely affects their torsional properties.

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Citations

Dec 15, 2015·Journal of Endodontics·Asım DaneBanu Uysal
Mar 15, 2012·Journal of Endodontics·Ju-Yeong KimHyeon-Cheol Kim
Jan 30, 2015·International Endodontic Journal·I D Çapar, H Arslan
Jul 19, 2011·Journal of Endodontics·Evandro Pires VieiraMaria Guiomar de Azevedo Bahia
Nov 26, 2010·Journal of Endodontics·Sung-Yeop YouWoocheol Lee
Sep 2, 2009·Journal of Endodontics·Tina KellBettina Basrani
Dec 17, 2008·Journal of Endodontics·Alexandre Sandri CâmaraMaria Guiomar de Azevedo Bahia
Sep 16, 2009·International Endodontic Journal·E P VieiraM G A Bahia
Jan 26, 2008·International Endodontic Journal·M C C MeloM G A Bahia
Aug 14, 2008·International Endodontic Journal·M G A BahiaV T L Buono
Mar 19, 2011·International Endodontic Journal·R P HussneM G A Bahia
Jul 21, 2011·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Snježana GlavičićJosipa Borčić
Oct 20, 2012·International Endodontic Journal·L C BragaM G A Bahia
Mar 13, 2014·Scanning·Ahmed JamlehHideaki Suda
Sep 26, 2006·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Renata de Castro MartinsBelo Horizonte
Feb 19, 2011·Journal of Endodontics·Jiwan YumHyeon-Cheol Kim
Jul 16, 2010·Journal of Endodontics·Su-Young ParkHyeon-Cheol Kim
Aug 25, 2016·Journal of Applied Oral Science : Revista FOB·Rafael Rodrigues Soares de MagalhãesMaria Guiomar de Azevedo Bahia
Dec 11, 2017·Clinical Oral Investigations·Murilo Priori AlcaldeRodrigo Ricci Vivan
Jun 8, 2012·Dental Materials Journal·Ahmed JamlehHideaki Suda
Oct 31, 2019·Brazilian Oral Research·Rodrigo Ricci VivanMarco Antonio Hungaro Duarte
Feb 20, 2021·Brazilian Oral Research·Edson Jorge Lima MoreiraEmmanuel João Nogueira Leal da Silva
Mar 1, 2021·Journal of Endodontics·Özlem Sivas YilmazHikmet Aydemir
Mar 24, 2010·Journal of Endodontics·Isabella Faria da Cunha PeixotoMaria Guiomar de Azevedo Bahia
Dec 10, 2019·Journal of Endodontics·Vasfiye IsikHyeon-Cheol Kim

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