Effects of raw material and rotational speed on the cyclic fatigue of ProFile Vortex rotary instruments

Journal of Endodontics
Yong GaoWilliam Ben Johnson

Abstract

This in vitro study compared the cyclic fatigue resistance of ProFile Vortex rotary instruments (DENTSPLY Tulsa Dental, Tulsa, OK) made of two different raw materials: M-Wire and regular superelastic wire (SE-wire) at two different rotational speeds. Two rotary-based Profile Vortex instruments with taper 0.04 and 0.06 (25 mm in length and #30 in size) were compared. Cyclic fatigue testing was performed by rotating instruments in an artificially constructed stainless steel canal with a 5-mm radius and a 90 degrees angle of curvature at two different test frequencies: 300 and 500 rpm. The time to failure was recorded, and the total number of cycles to failure was calculated and compared for a total of 160 samples. Statistical analysis was performed with one-way analysis of variance and the Tukey test for individual comparisons (confidence level of p < 0.05). Fracture surfaces of broken instruments were also observed under scanning electron microscopy. Over 50% of broken files made of SE-wire exhibited multiple crack initiation sites compared with the single crack initiation on files made of M-Wire. Overall, there were significant differences in rotary instruments made of different materials (p < 0.001). However, for rotary instru...Continue Reading

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Citations

Mar 29, 2014·Journal of Endodontics·Les CampbellMarkus Haapasalo
Nov 19, 2013·Journal of Endodontics·Juan José Pérez-HiguerasJosé C de la Macorra
Feb 14, 2013·Journal of Endodontics·Jung-Hong HaHyeon-Cheol Kim
Nov 14, 2012·Journal of Endodontics·Jeffrey R BurroughsVan T Himel
Nov 14, 2012·Journal of Endodontics·Ya ShenMarkus Haapasalo
Jun 19, 2012·Journal of Endodontics·Dina Al-SudaniGianluca Gambarini
Apr 21, 2012·Journal of Endodontics·Jason BouskaFang Qian
Apr 21, 2012·Journal of Endodontics·Giulio GaviniDirce Akemi Sacaguti Kawakami
Oct 18, 2011·Journal of Endodontics·Ya ShenMarkus Haapasalo
Jun 22, 2011·Journal of Endodontics·Ya ShenMarkus Haapasalo
Apr 24, 2015·Dental Materials Journal·Shaymaa E Elsaka, Amr M Elnaghy
Apr 7, 2015·Journal of Endodontics·Ya ShenMarkus Haapasalo
Jan 18, 2014·International Endodontic Journal·W HuT Svec
Sep 3, 2013·International Endodontic Journal·E PedullàE Rapisarda
Jan 8, 2014·International Endodontic Journal·A M Elnaghy
Nov 28, 2013·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Gianlucca GambariniLuca Testarelli
Feb 19, 2016·Journal of Dental Research, Dental Clinics, Dental Prospects·Swati SharmaPankaj Kharade
Apr 5, 2014·International Endodontic Journal·Y ShenM Haapasalo
Aug 13, 2014·Journal of Endodontics·Erika Sales Joviano PereiraMaria Guiomar de Azevedo Bahia
Dec 24, 2014·Journal of Endodontics·Amr M Elnaghy, Shaymaa E Elsaka
Aug 28, 2016·Journal of Endodontics·Gülşah UsluUğur İnan
Nov 5, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Erika S J PereiraVicente T L Buono
Nov 3, 2016·International Endodontic Journal·F FerreiraM Zaccaro Scelza
Jan 30, 2015·Brazilian Oral Research·Vitor Cesar NakamuraGiulio Gavini

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