Page 17 - SPEMD_59-2

Revista Portuguesa de Estomatologia,
Medicina Dentária e Cirurgia Maxilofacial

rev port estomatol med dent cir maxilofac. 2018;59(2):75-79

Original research

Cyclic fatigue resistance of ProTaper Gold and
comparison with ProTaper Universal instruments

a,
b
Fátima Pereira *, Rui F. Martins , António Ginjeira c
a Private practice
b UNIDEMI, Department of Mechanical and Industrial Engineering, Faculdade de Ciência e Tecnologia, Universidade Nova de Lisboa (FCT-UNL),
Lisboa, Portugal
c Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal

a r t i c l e i n f o a b s t r a c t

Article history: Objectives: The purpose of this study was to characterize the cyclic fatigue resistance of the
Received 3 October 2017 ProTaper Gold system and to compare it with the fatigue resistance of ProTaper Universal
Accepted 29 September 2018 system.
Available online 10 October 2018 Methods: A mechanical device simulate a root canal system with a radius of curvature of
4.7 mm and an angle of curvature of 45˚ was used to perform the rotational bending tests.
Keywords: Sizes F2 and F3 of ProTaper Gold and ProTaper Universal instruments constituted 4 experi-
Endodontics mental groups that were analyzed with a rotational speed of 300 rpm and a torque of 4 N.cm.
Fatigue resistance Time to fracture was recorded and number of cycles to fracture was calculated. Statistical
Nickel-titanium Instruments analysis was carried using Kolmogorov-Smirnov, T-student and U Mann-Whitney tests (p<0.05).
ProTaper Gold Results: ProTaper Gold F2 group showed higher number of cycles to fracture than ProTaper
ProTaper Universal Universal F2 group (p<0.05). Concerning F3 instruments, the same tendency could be stated:
number of cycles to fracture of ProTaper Gold F3 group was statistically higher (p<0.05).
Conclusions: ProTaper Gold system has proven to be more fatigue resistant than ProTaper
Universal. Furthermore, instruments with higher diameters showed lower number of cycles
to fracture. (Rev Port Estomatol Med Dent Cir Maxilofac. 2018;59(2):75-79)
© 2018 Sociedade Portuguesa de Estomatologia e Medicina Dentária.
Publicado por SPEMD. Este é um artigo Open Access sob uma licença CC BY -NC -ND
(http://creativecommons.org/licenses/by -nc -nd/4.0/).

* Corresponding author.
Correio eletrónico: fatimapereira@campus.ul.pt (Fátima Pereira).
http://doi.org/10.24873/j.rpemd.2018.09.232
1646-2890/© 2017 Sociedade Portuguesa de Estomatologia e Medicina Dentária. Published by SPEMD.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).