1Lecturer Assistant, Department of Conservative and Cosmetic Dentistry, Collage of Dentistry, University of Baghdad, Baghdad, Iraq
2Lecturer, Department of Conservative and Cosmetic Dentistry, Collage of Dentistry, University of Baghdad, Baghdad, Iraq
3Lecturer, Department of Conservative, Al-Bayan University, Baghdad, Iraq
4Dentist, General Practitioner, Ministry of Health, Baghdad, Iraq
This study aimed to compare the resistance to cyclic fatigue of Protaper Next, 2Shape and HyFlex EDM and assess the effect of glyde. A total of 30 new Protaper Next, 2Shape and HyFlex EDM were tested. From each brand 10 files were tested with glyde. The cyclic fatigue test was performed using a specially designed endodontic motor. Resistance to fracture was determined by recording the time. The study concluded that HyFlex EDM recorded the highest value of resistance to cyclic fatigue than 2Shape and Protaper Next respectively. Glyde may reduce the resistance to cyclic fatigue in all brands of files also was concluded in this study.
Cyclic fatigue, Glyde, Reciprocating instruments
