A Comparison of Nickel-titanium Rotary Instruments Manufactured Using Different Methods and Cross-sectional Areas: Ability to Resist Cyclic Fatigue

Overview

Journal Oral Surg Oral Med Oral Pathol Oral Radiol Endod

Publisher Elsevier

Specialties Dentistry
General Surgery

Date 2010 Mar 23

PMID 20303058

Citations 15

Authors

So-Ram Oh

Seok-Woo Chang

Yoon Lee

Yu Gu

Won-Jun Son

WooCheol Lee

Seung-Ho Baek

Kwang-Shik Bae

Gi-Woon Choi

Sang-Min Lim

Kee-Yeon Kum

Affiliations

Soon will be listed here.

Abstract

Objective: This study examined the effect of the manufacturing methods (ground, electropolished, and twisted) and the cross-sectional area (CSA) of nickel-titanium (NiTi) rotary instruments on their cyclic fatigue resistance.

Study Design: A total of 80 NiTi rotary instruments (ISO 25/.06 taper) from 4 brands (K3, ProFile, RaCe, and TF) were rotated in a simulated root canal with pecking motion until fracture. The number of cycles to failure (NCF) was calculated. The CSA at 3 mm from the tip of new instruments of each brand was calculated. The correlation between the CSA and NCF was evaluated. All fractured surfaces were analyzed using a scanning electron microscope to determine the fracture mode.

Results: The TF instruments were the most resistant to fatigue failure. The resistance to cyclic failure increased with decreasing CSA. All fractured surfaces showed the coexistence of ductile and brittle properties.

Conclusion: The CSA had a significant effect on the fatigue resistance of NiTi rotary instruments.

Citing Articles

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Revolutionizing endodontics: Advancements in nickel-titanium instrument surfaces.

Agrawal P, Chandak M, Nikhade P, Patel A, Bhopatkar J J Conserv Dent Endod. 2024; 27(2):126-133.

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Evaluation of cyclic fatigue and bending test for different Nickle-Titanium files.

Ramadan F, AbuMostafa A, AlHarith D PLoS One. 2023; 18(8):e0290744.

PMID: 37624849 PMC: 10456180. DOI: 10.1371/journal.pone.0290744.

Effect of different axial speed patterns on cyclic fatigue resistance of rotary nickel-titanium instruments.

Thu M, Ebihara A, Maki K, Nishijo M, Kimura S, Nakatsukasa T BMC Oral Health. 2022; 22(1):617.

PMID: 36529721 PMC: 9761994. DOI: 10.1186/s12903-022-02639-8.

: From heat treatment to surface functionalization for nickel-titanium (NiTi) instruments in endodontics.

Chan W, Gulati K, Peters O Bioact Mater. 2022; 22:91-111.

PMID: 36203965 PMC: 9520078. DOI: 10.1016/j.bioactmat.2022.09.008.