Home Subscription Services

Endodontic Practice Today
ENDO Home Page
About the Editor
Editorial Board
Author Guidelines
Submission Form
Reprints / Articles
Official Site
Quintessence Publishing: Journals: ENDO


ENDO - Endodontic Practice Today

Edited by Bun San Chong and Edgar Schäfer

Official Publication of the Belgian Association for Endodontology and Traumatology (BAET) and the French Society of Endodontics (SFE)

ISSN (print) 1753-2809 • ISSN (online) 1753-2817


Fall 2019
Volume 13 , Issue 3

Pages: 247–253
Share Abstract:

Cyclic fatigue and torsional resistance of heat-treated One Curve compared with different nickel-titanium rotary instruments

Amr M. Elnaghy, Shaymaa E. Elsaka

Objective: The present study compared the cyclic fatigue and torsional resistance of size 25/0.06 taper of One Curve (OC), 2Shape (TS), ProFile Vortex (PV) and OneShape (OS) instruments.

Materials and methods: The cyclic fatigue resistance of instruments was tested in simulated canals with 90-degree angle of curvature until fracture. The number of cycles to fracture (NCF) was recorded. The torsional resistance was determined by counting the number of load applications before instrument fracture. Data were statistically analysed and Weibull analysis was conducted on NCF data. Statistical significance was set at P < 0.05.

Results: OC had the highest NCF between the tested instruments (P < 0.001). Nevertheless, OS showed the highest torsional resistance compared with other instruments (P < 0.001). The predicted cycles of OC were 238 cycles for 99% survival. On the other hand, OS instruments had the lowest predicted cycles (60 cycles) compared with other instruments.

Conclusion: OC instrument (C-Wire) had a higher cyclic fatigue resistance but a lower torsional resistance. TS and PV heat-treated nickel-titanium (NiTi) alloys enhanced the cyclic fatigue resistance of rotary instruments compared with OS conventional NiTi instruments. OS instruments displayed superior torsional resistance compared with other instruments.

Full Text PDF File | Order Article


  © 2020 Quintessence Publishing Co Inc

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog