Cyclic and Torsional Fatigue Resistance of Reciprocating Single Files Manufactured by Different Nickel-titanium Alloys

Journal of Endodontics
Murilo P AlcaldeRodrigo Ricci Vivan

Abstract

The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the following reciprocating single-file systems: ProDesign R 25.06 (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), Reciproc R25 (VDW GmbH, Munich, Germany), and Unicone L25 (Medin SA, Nové Město in Moravě, Czech Republic). Sixty instruments of the ProDesign R, Reciproc R25, and Unicone L25 systems (n = 20) were used. Cyclic fatigue resistance was tested measuring the time to failure in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature (n = 10). Torque and angle of rotation at failure of new instruments (n = 10) in the 3 mm from the tip portion were measured during torsional testing according to ISO 3630-1. The fractured surface of each fragment was examined by scanning electron microscopy. Data were analyzed using 1-way analysis of variance and Tukey tests, and the level of significance was set at 5%. The cyclic fatigue resistance values of ProDesign R 25.06 were significantly higher than the other groups (P < .05). Reciproc R25 showed higher fatigue resistance than Unicone L25 (P < .05). In relation to the torsional test, the ProDesign R 25.06 and Unicone L25 systems showed higher angular rotation u...Continue Reading

Citations

Feb 3, 2018·Clinical Oral Investigations·Emmanuel João Nogueira Leal SilvaEdson Jorge Lima Moreira
Mar 12, 2018·Clinical Oral Investigations·Camila Galletti EspirMário Tanomaru-Filho
Dec 27, 2018·International Endodontic Journal·C B SantosE J N L Silva
Oct 31, 2019·Brazilian Oral Research·Rodrigo Ricci VivanMarco Antonio Hungaro Duarte
Apr 18, 2019·Brazilian Oral Research·Carlos Roberto Emerenciano BuenoEloi Dezan-Júnior
Aug 9, 2020·International Endodontic Journal·W S P LopesF R Pires
Apr 30, 2021·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Giulio GaviniMarco Antonio Húngaro Duarte
Sep 9, 2020·Journal of Endodontics·Jorge N R MartinsMarco Aurélio Versiani

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