Effect of environment on fatigue failure of controlled memory wire nickel-titanium rotary instruments

Journal of Endodontics
Ya ShenMarkus Haapasalo

Abstract

This study examined the fatigue behavior of 2 types of nickel-titanium (NiTi) instruments made from a novel controlled memory NiTi wire (CM wire) under various environment conditions. Three conventional superelastic NiTi instruments of ProFile (Dentsply Maillefer, Ballaigues, Switzerland), Typhoon (Clinician's Choice Dental Products, New Milford, CT), and DS-SS0250425NEYY (Clinician's Choice Dental Products) and 2 new CM wire instruments of Typhoon CM and DS-SS0250425NEYY CM were subjected to rotational bending at the curvature of 35° in air, deionized water, 17% EDTA, or deionized water after immersion in 6% sodium hypochlorite for 25 minutes, and the number of revolutions of fracture (N(f)) was recorded. The fracture surface of all fragments was examined by a scanning electron microscope. The crack-initiation sites and the percentage of dimple area to the whole fracture cross-section were noted. Two new CM Wire instruments yielded an improvement of >4 to 9 times in N(f) than conventional NiTi files with the same design under various environments (P < .05). The fatigue life of 3 conventional superelastic NiTi instruments was similar under various environments, whereas the N(f) of 2 new CM Wire instruments was significantly lon...Continue Reading

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Oct 18, 2011·Journal of Endodontics·Ya ShenMarkus Haapasalo

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Citations

Mar 29, 2014·Journal of Endodontics·Les CampbellMarkus Haapasalo
Oct 22, 2013·Journal of Endodontics·Leandro de Arruda SantosVicente Tadeu Lopes Buono
Dec 12, 2012·Journal of Endodontics·Elizabeth Ninan, David W Berzins
Mar 20, 2016·Journal of Endodontics·Rafaela Andrade de VasconcelosOve A Peters
Jul 31, 2014·International Endodontic Journal·M Alfoqom AlazemiP M H Dummer
Jul 5, 2016·Journal of the Formosan Medical Association = Taiwan Yi Zhi·Chih-Wen ChiChow-Shing Shin
Jan 31, 2017·Journal of Endodontics·Gustavo De-DeusNicola Maria Grande
Aug 26, 2014·Journal of Endodontics·Lígia Carolina Moreira BragaMaria Guiomar de Azevedo Bahia
Mar 27, 2018·International Endodontic Journal·J ZupancE Schäfer
Aug 15, 2018·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Nicholas Chandler, Deepak Chellappa
May 28, 2019·International Endodontic Journal·E J N L SilvaH S Antunes
Jan 22, 2013·International Endodontic Journal·Y ShenM Haapasalo
Apr 5, 2014·International Endodontic Journal·Y ShenM Haapasalo
May 17, 2018·Restorative Dentistry & Endodontics·Eugenio PedullàLuca Testarelli
Oct 27, 2018·Brazilian Oral Research·Giulio GaviniGeorge Táccio de Miranda Candeiro
Aug 15, 2019·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Hüseyin Sinan TopçuoğluHacer Balkaya
Jan 8, 2021·Journal of Dental Research, Dental Clinics, Dental Prospects·Hakan ArslanEbru Tepecik
Dec 23, 2021·European Journal of Dentistry·Alexandra Aparecida TanomaruMarcos Frozoni

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