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Publisher: Peytchinski Publishing
ISSN: 1312-773X (Online)
Issue: 2018, vol. 24, issue2
Subject Area: Dental Medicine
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DOI: 10.5272/jimab.2018242.2014
Published online: 06 June 2018
Original article
J of IMAB. 2018 Apr-Jun;24(2):2014-2019
Evaluation of deformation and fracture of three single-file NiTi rotary instruments: ProTaper F2, WaveOne Primary and OneShape in simulated curved canals
Mina A. Shenouda
, Wafaa Ahmed Omar Segari, Siza Y. Zakhari,
Department of Endodontics, Faculty of Oral and Dental Medicine, Cairo University, Egypt.
ABSTRACT:
Purpose. The aim of the current study was to compare the incidence of deformation and fracture in three single-file NiTi instruments: ProTaper F2, WaveOne Primary and OneShape.
Methods. Fifteen instruments were equally divided into three groups: ProTaper F2 in reciprocation, WaveOne Primary in reciprocation and OneShape in continuous rotation. Each instrument was used to prepare standardized simulated curved canals in resin blocks until fracture had occurred. Following each canal preparation, the instruments were examined for deformation both by naked eye inspection and stereomicroscopic examination. The average number of canals prepared until the first incidence of cracks and the average lifespan of the instruments were calculated. Data were analysed using one-way ANOVA and two-sample t-test.
Results. There was no statistically significant difference between ProTaper and WaveOne instruments in both the incidence of cracks and the average lifespan (P > 0.05). OneShape instruments had a significantly delayed incidence of cracks and a longer lifespan than both ProTaper and WaveOne instruments (P < 0.05); however, OneShape instruments showed a noticeable early plastic deformation.
Conclusion: PT F2 instrument was comparable to WO Primary instrument in terms of fracture resistance, while OS instrument had more fracture resistance than both PT F2 and WO Primary instruments.
Keywords: crack, deformation, fracture, simulated canals, single-file,
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Please cite this article as: Shenouda MA, Segari WAO, Zakhari SY. Evaluation of deformation and fracture of three single-file NiTi rotary instruments: ProTaper F2, WaveOne Primary and OneShape in simulated curved canals. J of IMAB. 2018 Apr-Jun;24(2):2014-2019. DOI: 10.5272/jimab.2018242.2014
Correspondence to: Mina Aziz Shenouda; 63, Ain Shams Str., Cairo, Egypt 11761; E-mail: mina.shenouda@dentistry.cu.edu.eg ,
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Received: 25 February 2018
Published online: 06 June 2018