Cyclic fatigue resistance of novel Genius and Edgefile nickel-titanium reciprocating instruments

Bueno, Carlos Roberto Emerenciano; Cury, Marina Tolomei Sandoval; Vasques, Ana Maria Veiga; Sivieri-Araújo, Gustavo; Jacinto, Rogério de Castilho; Gomes‐Filho, João Eduardo; Cintra, Luciano Tavares Ângelo; Dezan, Elói

doi:10.1590/1807-3107bor-2019.vol33.0028

Cited by 9 publications

(13 citation statements)

References 42 publications

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“…In the present study, the resistance to cyclic fatigue of each NiTi rotary file, which was tested by using static models since they met the standard conditions. The superiority of the static models include mostly in reducing variables, like the amplitude of axial movements (17).…”

Section: Discussionmentioning

confidence: 99%

Comparison of the resistance to cyclic fatigue of One Curve, One Shape, 2Shape and EdgeFile X3 files in simulated single and S-shaped (double) curvatures

Adıgüzel

Öztekin

2020

Int Dent Res

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Aim: To evaluate the fracture resistance to cyclic fatigue of One Curve (Micro-Mega, Besancon, Cedex, France), One Shape (Micro-Mega), 2Shape (Micro-Mega) and EdgeFile X3 (EdgeEndo, Albuquerque, NM) files in simulated root canals. Methodology: One hundred and sixty nickel-titanium endodontic files were tested in simulated canals with single and s-shaped (double) curvatures. The One Curve (25/.06), One Shape (25/.06), 2Shape (25/.06) and EdgeFile X3 (25/.06) files were assessed (n=20 for each test). All the files were rotated up to fracture occurred. The number of cycles to fracture (NCF) was determined and also, the length of the fractured file part was measured. For statistical analysis, one-way analysis of variance and Tukey HSD tests were used (p < 0.05). Results: NCF for all instrument groups were significantly higher in the single curvature canal compared to the s-shaped curvature canal (p < 0.05). The EdgeFile X3 had the highest fatigue resistance in both curvature groups. The NCF of the One Curve were higher than that of the One Shape and 2Shape files (p < 0.05). In the s-shaped curvature canal, the files inclined to fracture more often in the apical curvature compared to the coronal curvature. There was no statistically considerable difference in the length of the fractured parts among the four experiment groups in either the single or s-shaped canal curvatures (p > 0.05). Conclusion: Within the limitations of this study, fracture resistance to cyclic fatigue was the highest for the EdgeFile X3 group followed by the One Curve group and lowest for the 2Shape and One Shape group. How to cite this article: Adıgüzel M, Öztekin F. Comparison of the resistance to cyclic fatigue of One Curve, One Shape, 2Shape and EdgeFile X3 Files in simulated single and S-shaped (double) curvatures. Int Dent Res 2020;10(2):55-59. https://doi.org/10.5577/intdentres.2020.vol10.no2.5 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

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Section: Discussionmentioning

confidence: 99%

Comparison of the resistance to cyclic fatigue of One Curve, One Shape, 2Shape and EdgeFile X3 files in simulated single and S-shaped (double) curvatures

Adıgüzel

Öztekin

2020

Int Dent Res

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“…CF resistance of instruments made of M‐Wire and Gold technology has been tested before, but information about CF behaviour of instruments made of the recently developed Fire‐Wire in reciprocation motion is limited (). Studies comparing ProTaper Universal and ProTaper Gold instruments, identical instruments made with M‐Wire and Gold technology, found superior CF for Gold proprietary processing ().…”

Section: Discussionmentioning

confidence: 99%

Resistance to cyclic fatigue of reciprocating instruments determined at body temperature and phase transformation analysis

et al. 2019

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The purpose of this study was to compare cyclic fatigue (CF) resistance of reciprocating instruments at body temperature and relate the findings to their martensitic transformation temperatures. Contemporary nickel-titanium (NiTi) reciprocating instruments WaveOne Primary, WaveOne Gold Primary and EdgeFile X1 (n = 20 each and #25 tip diameter) were tested for CF resistance at body temperature (37 AE 1°C). Instruments were actioned according to manufacturer guidelines until fracture occurred in a simulated canal (angle of curvature = 60°, radius of curvature = 3 mm and centre of curvature = 5 mm from the tip). Time to fracture was recorded, and data analysed using Weibull analysis. Two instruments of each were tested using differential scanning calorimetry (DSC) to assess phase transformation temperatures. Reciprocating instruments manufactured with new alloys seem to be safer to CF than those manufactured with traditional M-Wire at body temperature. Martensitic transformation temperatures seem not to relate with fatigue behaviour for reciprocating motions.

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“…The surface of the EDM processed files is harder, instruments are more resistant to the fractures, due to significantly enhanced resistance to cyclic and torsional fatigue [ 6 ]. EdgeFile (EdgeEndo, Albuquerque, NM, USA) endodontic instruments are made from Fire-Wire™ annealed heat-treated NiTi alloy, which increases flexibility, flexural strength and resistance to cyclic fatigue of the files [ 14 ]. The controlled memory wire, which is used for grounding of the instruments, ensures the better centering ability of the files during rotation and less root canal transportation in comparison to traditional NiTi alloys [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Micro-computed tomography (µCT) has been widely used for the two- and three-dimensional (2D, 3D) evaluation of shaped root canals due to the noninvasiveness, repeatability and high accuracy of the technique [ 7 , 11 ]. The assessment of cyclic fatigue resistance and subsequent fractographic analysis of the fractured fragments using scanning electron microscopy (SEM) is the most commonly used methods to evaluate the resistance to fractures and topographic profile of the surfaces of the separated instruments [ 13 , 14 ]. The published scientific data regarding the 3D (volume, area, unprepared surfaces) and 2D (canal transportation, the thickness of the remaining dentin) changes in root canal geometry as well as a cyclic fatigue resistance of thermally-treated instruments is still lacking and controversial [ 12 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Shaping and Centering Ability, Cyclic Fatigue Resistance and Fractographic Analysis of Three Thermally Treated NiTi Endodontic Instrument Systems

et al. 2020

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The better understanding of the clinically important behavioral features of new instrument systems has an important significance for the clinical endodontics. This study aimed to investigate the shaping and centering ability as well as cyclic fatigue resistance of HyFlex CM (CM), HyFlex EDM (EDM) and EdgeFile (EF) thermally treated nickel–titanium (NiTi) endodontic instrument systems. Sixty curved root canals of the mesial roots of mandibular molars were randomly assigned into three groups (n = 20) and shaped using CM, EDM and EF files up to the size 40 and taper 04 of the instruments. µCT scanning of the specimens before and after preparation was performed and the morphometric 2D and 3D parameters were evaluated in the apical, middle and coronal thirds of root canals. In each group, 40.04 instruments (n = 20) were subjected to the cyclic fatigue resistance test in artificial root canals at 37 °C temperature until fractures occurred, and the number of cycles to failure (NCF) was calculated. The fractographic analysis was performed using a scanning electron microscope, evaluating topographic features and surface profiles of the separated instruments. The one-way analysis of variance with post hoc Tuckey’s test was used for statistical analysis of the data; the significance level was set at 5%. All systems prepared the comparable percentage of root canal surface with the similar magnitude of canal transportation in all root thirds (p > 0.05), but demonstrated significantly different resistance to cyclic fatigue (p < 0.05). The most resistant to fracture was EF, followed by EDM and CM. The length of the fractured fragments was not significantly different between the groups, and fractographic analysis by SEM detected the typical topographic features of separated thermally treated NiTi instrument surfaces.

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Cyclic fatigue resistance of novel Genius and Edgefile nickel-titanium reciprocating instruments

Abstract: Marina Tolomei Sandoval CURY (a) Ana Maria Veiga VASQUES (a) Gustavo SIVIERI-ARAÚJO (a) Rogério Castilho JACINTO (a) João Eduardo GOMES-FILHO (a) Luciano Tavares Angelo CINTRA (a) Eloi DEZAN-JÚNIOR (a)

Cited by 9 publications

References 42 publications

Comparison of the resistance to cyclic fatigue of One Curve, One Shape, 2Shape and EdgeFile X3 files in simulated single and S-shaped (double) curvatures

Comparison of the resistance to cyclic fatigue of One Curve, One Shape, 2Shape and EdgeFile X3 files in simulated single and S-shaped (double) curvatures

Resistance to cyclic fatigue of reciprocating instruments determined at body temperature and phase transformation analysis

Shaping and Centering Ability, Cyclic Fatigue Resistance and Fractographic Analysis of Three Thermally Treated NiTi Endodontic Instrument Systems

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