Potential relationship between design of nickel-titanium rotary instruments and vertical root fracture

Journal of Endodontics
Hyeon-Cheol KimByung-Min Kim

Abstract

Nickel-titanium (NiTi) rotary files can produce cleanly tapered canal shapes with low tendency of transporting the canal lumen. Because NiTi instruments are generally perceived to have high fracture risk during use, new designs have been marketed to lower fracture risks. However, these design variations may also alter the forces on a root during instrumentation and increase dentinal defects that predispose a root to fracture. This study compared the stress conditions during rotary instrumentation in a curved root for three NiTi file designs. Stresses were calculated using finite element (FE) analysis. FE models of ProFile (Dentsply Maillefer, Ballaigues, Switzerland; U-shaped cross-section and constant 6% tapered shaft), ProTaper Universal (Dentsply; convex triangular cross-section with notch and progressive taper shaft), and LightSpeed LSX (Lightspeed Technology, Inc, San Antonio, TX; noncutting round shaft) were rotated within a curved root canal. The stress and strain conditions resulting from the simulated shaping action were evaluated in the apical root dentin. ProTaper Universal induced the highest von Mises stress concentration in the root dentin and had the highest tensile and compressive principal strain components at ...Continue Reading

Citations

May 28, 2014·Journal of Endodontics·Hend Mahmoud Abou El Nasr, Karim Galal Abd El Kader
Nov 19, 2013·Journal of Endodontics·Hyeon-Cheol KimByung-Min Kim
Jul 17, 2012·Journal of Endodontics·Mirela Sangoi BarretoCarlos Alexandre Souza Bier
Jan 30, 2015·International Endodontic Journal·I D Çapar, H Arslan
Jul 19, 2011·Journal of Endodontics·Evandro Pires VieiraMaria Guiomar de Azevedo Bahia
Dec 17, 2014·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Ugur AydinCihan Yildirim
Jan 14, 2011·International Endodontic Journal·T von ArxF R Tay
Oct 11, 2013·International Endodontic Journal·V AshwinkumarN Velmurugan
Oct 1, 2015·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Ahmed JamlehHideaki Suda
Aug 5, 2014·International Endodontic Journal·J H HaH C Kim
Jun 4, 2015·European Journal of Dentistry·Bilge Gulsum NurIsmail Davut Capar
Jun 13, 2015·Journal of Conservative Dentistry : JCD·Deepa Deepak ShoriSwapnil Pandey
Jun 9, 2016·Interface Focus·Amre R Atmeh, Timothy F Watson
Jan 31, 2017·Journal of Endodontics·Eugenio PedullàCarlos G Adorno
Dec 17, 2016·Brazilian Dental Journal·Gustavo De-DeusMarco Aurélio Versiani
Aug 26, 2014·Journal of Endodontics·Ismail Davut CaparBanu Uysal
Mar 16, 2018·The Open Dentistry Journal·Victor Feliz PedrinhaPatrícia de Almeida Rodrigues
Mar 25, 2019·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Tina RödigMarta Rizk
Apr 27, 2019·International Endodontic Journal·A R PradeepKumarA Kishen
Nov 17, 2016·Restorative Dentistry & Endodontics·Jung-Hong HaHyeon-Cheol Kim
Oct 10, 2014·Journal of Conservative Dentistry : JCD·Zvi Metzger

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