Title
Cyclic fatigue resistance in NiTi files by four different sterilization methods
Authors
Markapurapu Baba Sainadh*, Satyam Martha, R Punithavathy, M Sri Ramya, Kondapalli Haritha, Amulya Jalumuru
Affiliation
Department of Pediatric and Preventive Dentistry, Lenora Institute of Dental Sciences, Rajamahendravaram, Andhra Pradesh, India; *Corresponding author
Markapurapu Baba Sainadh - E-mail: drmbsainadh@gmail.com
Satyam Martha - E-mail: drsatyammartha@gmail.com
Punithavathy R - E-mail: punithanaren@gmail.com
M Sri Ramya - E-mail: maganti.sriramya@gmail.com
Kondapalli Haritha - E-mail: kharithabds826@gmail.com
Amulya Jalumuru - E-mail: amulyajalumuru8@gmail.com
Article Type
Research Article
Date
Received January 1, 2026; Revised January 31, 2026; Accepted January 31, 2026, Published January 31, 2026
Abstract
The cyclic fatigue resistance of Pedoflex NiTi files that have been exposed to four sterilization techniques. Hence, a total of fifty Pedoflex NiTi rotary instruments were selected at random and were assigned to five groups according to the type of the sterilization method used and five sterilization cycles carried out in each group. After the sterilization procedure, the evaluation of all files under cyclic fatigue resistance was done on a simulated curved canal model up to fracture. It was discovered that nickel-titanium alloy was very susceptible to thermal and mechanical stresses. Autoclave sterilization with the help of thermal treatment improved the crystallographic arrangement of the alloy and led to greater flexibility. The repeated cycles do not significantly reduce fatigue life and that autoclaving may even enhance cyclic fatigue resistance, thereby supporting evidence-based decisions on safe reuse of heat-treated pediatric NiTi instruments in high-volume clinical settings.
Keywords
Pediatric endodontics, NiTi rotary files, cyclic fatigue resistance, sterilization, autoclave, sodium hypochlorite, glass bead sterilization, ethyl alcohol.
Citation
Sainadh et al. Bioinformation 22(1): 219-223 (2026)
Edited by
Vini Mehta
ISSN
0973-2063
Publisher
License
This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.
