History of Medicine


An Open Access Journal

The effect of sterilization cycle on cyclic fatigue resistance of rotary files (in vitro study)

Mohammed Hamoudi Alsunboli
Al-Bayan University /College Of Dentistry/Iraq
Seemaa abdulameer kadhem
Al-Bayan University /College Of Dentistry/Iraq
Ahmed Saad
Al-Bayan University /College Of Dentistry/Iraq



Files' cutting efficiency, cyclic fatigue resistance, surface roughness, and accumulation of dentinal debris on them, among other characteristics, can all be affected by the repetitive autoclaving and sterilization. Cutting efficiency, also referred to as an instrument's ability to extract dentine from a canal, is one of its qualities.

Aim of study:

The study's objective is to ascertain how autoclave sterilization affects the cycle fatigue resistance (CFR) of two various rotary nickel-titanium (NiTi) systems.


The Edge File and Fanta File rotary endodontic instrument groups were chosen. Each group (n = 42) was split into 3 subgroups (n = 14 each), Based on the amount of autoclaving cycles (0, 1, 2 cycles). The tools went through an autoclave without being used. 


The result appeared different significant between the two group and sub group with the different cycle of sterilization that used with it with the length of fractures and time that recorded in each group.


cyclic of sterilization appeared to have considerably varied cycle fatigue resistance for various lengths of fractures and durations, according to the comparison between the two evaluated instruments.

Keywords: sterilization cycle; rotary files; fatigue resistance ,


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I.M. Sechenov

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