Evaluation of the mechanical protperties of an experimental nickel-titanium instrument manufactured by EDM technology

• Grant number: 19/25312-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2020
• End date: December 31, 2020
• Field of knowledge: Health Sciences - Dentistry - Endodontics
• Principal Investigator: Murilo Priori Alcalde
• Grantee: Beatriz Alves Barzotti
• Host Institution: Centro Universitário Sagrado Coração (UNISAGRADO). Instituto das Apóstolas do Sagrado Coração de Jesus (IASCJ). Bauru , SP, Brazil

Abstract

The aim of this study is to evaluate the cyclic and torsional fatigue resistance of Nickel-Titanium rotary instruments manufactured by EDM technology: Hyflex EDM 25.~ (Coltene, Whaladent AG) e Mk Life Prototype 25.06 (Mk Life, Porto Alegre). The instruments were reciprocated until fracture occurred in an artificial stainless steel canal with a 600 angle and a 5-mm radius of curvature (n=10). The torsional test evaluated the torque and angle of rotation at the failure of the instruments (n=10) in the portion 3 mm from the tip according to ISO 3630-1. The fractured surface of each fragment was observed by using scanning electron microscopy (SEM). (AU)