Evaluation of the resistance to cyclic fatigue among ProTaper Next, ProTaper Universal, and Vortex Blue rotary instruments.
ORCiD
Dr. Ove A. Peters: 0000-0001-5222-8718
Department
Endodontics
Document Type
Article
Publication Title
Journal of Endodontics
ISSN
0099-2399
Volume
40
Issue
8
DOI
10.1016/j.joen.2013.12.033
First Page
1190
Last Page
1193
Publication Date
8-1-2014
Abstract
INTRODUCTION: The purpose of this study was to compare the fracture resistance to cyclic fatigue of ProTaper Next (PTN; Dentsply Tulsa Dental Specialties, Tulsa, OK), ProTaper Universal (PTU, Dentsply Tulsa Dental Specialties), and Vortex Blue (VB, Dentsply Tulsa Dental Specialties) rotary instruments.
METHODS: Twenty instruments each of PTN X1-X5, PTU S1-F5, and VB 20/04-50/04 were rotated until fracture in a simulated canal of 90° and a 5-mm radius using a custom-made testing platform. The number of cycles to fracture (NCF) was calculated. Weibull analysis was used to predict the maximum number of cycles when 99% of the instrument samples survive.
RESULTS: VB 20/04-30/04 had significantly higher NCF than PTU S1-F5 and PTN X1-X5. VB 35/04-45/04 had significantly higher NCF than PTU S2-F5 and PTN X2-X5. PTN X1 had higher NCF than PTU S1-F5. PTN X2 had higher NCF than PTU F2-F5. The Weibull distribution predicted the highest number of cycles at which 99% of instruments survive to be 766 cycles for VB 25/04 and the lowest to be 50 cycles for PTU F2.
CONCLUSIONS: Under the limitations of this study, VB 20/04-45/04 were more resistant to cyclic fatigue than PTN X2-X5 and PTU S2-F5. PTN X1 and X2 were more resistant to cyclic fatigue than PTU F2-F5. The Weibull distribution appears to be a feasible and potentially clinically relevant model to predict resistance to cyclic fatigue.
Recommended Citation
Nguyen, H. H.,
Fong, H.,
Paranjpe, A.,
Flake, N. M.,
Johnson, J. D.,
&
Peters, O. A.
(2014).
Evaluation of the resistance to cyclic fatigue among ProTaper Next, ProTaper Universal, and Vortex Blue rotary instruments..
Journal of Endodontics, 40(8), 1190–1193.
DOI: 10.1016/j.joen.2013.12.033
https://scholarlycommons.pacific.edu/dugoni-facarticles/346
