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, Mehmet; Öztekin, Faruk

doi:10.5577/intdentres.2020.vol10.no2.5

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…These differences can be related to the different thermal treatment approaches of alloys of the instruments subjected to the fatigue test. Previous investigations are in agreement with the findings, demonstrating superior or even exceptional resistance of the Fire-Wire™ NiTi alloy EdgeFiles to cyclic fatigue in comparison to other thermally treated or conventional NiTi instruments at the 37 • C testing temperature [37,38]. In this investigation, the EDM files demonstrated better resistance to cyclic fatigue in comparison with CM instruments, and these results are in concordance with previous findings [39].…”

Section: Discussionsupporting

confidence: 92%

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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Section: Discussionsupporting

confidence: 92%

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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“…If Af is higher than the body temperature, the file will be in a mixed martensitic state, Rphase and austenitic structure. 5 Therefore, heat treated files demonstrated a significant increase in flexibility and flexural fatigue resistance in intra-canal temperature.…”

Section: Introductionmentioning

confidence: 99%

An in-vitro comparative study of cyclic fatigue resistance of twisted files, Hyflex cm, Hyflex edm and Edgefile X3 after immersion in sodium hypochlorite and/or sterilization

Sinha¹,

Das²,

Bhattacharyya³

et al. 2021

IJCE

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The purpose of this study was to assess the effects of sodium hypochlorite (NaOCl) immersion and sterilization on the cyclic fatigue resistance of four heat-treated nickel-titanium (NiTi) rotary instruments. Materials and Methods: Two hundred and forty new nickel-titanium endodontic files were tested for cyclic fatigue resistance in simulated canals. 25/.06 Twisted Files (Sybron Endo, Orange, CA, USA), 25/.06 Hyflex CM (Coltene Whaledent, Cuyahoga Falls, OH), 25/~Hyflex EDM (Coltene, Whaledent Pvt Ltd) and 25/.06 EdgeFile X3 (EdgeEndo, Albuquerque, NM, USA) files were divided into 4 subgroups (n = 15) for each brand. Subgroup 1 (control group) included new instruments that were not immersed in NaOCl or subjected to autoclave sterilization. Subgroup 2 were composed of instruments dynamically immersed for 3 minutes in 5.25% NaOCl solution. Subgroup 3 consisted of instruments that underwent 3 cycles of autoclave sterilization at 121 • C under 15 psi for 15 minutes. Subgroup 4 recruited instruments that received a cycle of both dynamic immersion in NaOCl solution for 3 minutes and 3 cycles of autoclave sterilization. All the files were rotated till fracture occurred. The means and standard deviations of the number of cycles to failure (NCF) were calculated and statistically analyzed using ANOVA with post-hoc Games Howell test. (P < .001). Results: Comparison among the four investigated instruments indicated statistically significant difference of NCF (P > .001). EdgeFile X3 files exhibited highest cyclic fatigue resistance, followed by Hyflex EDM files, Hyflex CM files and lowest resistance exhibited by Twisted Files in all the subgroups. There was also statistical significant difference (P < .001) when comparing the instruments in respect to the four treatment protocols (subgroups). Instruments undergoing dynamic immersion in NaOCl solution for 3 minutes followed by 3 cycles of autoclave sterilization did influence the cyclic fatigue of NiTi files tested, which showed a significant increase of cyclic fatigue resistance for all the four different heat-treated instruments when compared with the control group. Conclusions: Within the limitations of this study, fracture resistance to cyclic fatigue was the highest for the EdgeFile X3 group followed by Hyflex EDM group, Hyflex CM group and lowest for Twisted File group in all the subgroups. Instruments undergoing dynamic immersion in NaOCl solution for 3 minutes followed by 3 cycles of autoclave sterilization did influence.

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“…EdgeFile system was manufactured using Firewire technology that is responsible for its improved CFR over the other file systems. [ 24 ]…”

Section: Discussionmentioning

confidence: 99%

Effect of autoclaving on the cyclic fatigue resistance of nickel-titanium rotary instruments: An in vitro study

et al. 2021

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Aim: The aim of the study is to determine the effect of autoclaving on the cyclic fatigue resistance (CFR) in respect to three different rotary nickel-titanium (NiTi) systems. Methods: Three rotary NiTi files with different manufacturing process were selected and arranged into three groups. Group 1: Neolix Neoniti files ( n = 15), Group 2: Edge Files ( n = 15), Group 3: NeoendoFlex files ( n = 15). Each group was then subdivided into three subgroups containing 5 samples each based on the number of cycles of autoclaving (0, 1, 5 cycles). The instruments were subjected to autoclave without usage. The files of size 25, taper 6%, and 25 mm length were taken. After the autoclaving cycles, the files were rotated in cyclic fatigue testing device with simulated canal curvature of 60° until file separation. Time taken for the instrument separation (in minutes) was multiplied by the number of rotations per minute to attain the mean number of cycles to failure for every file. The obtained results were subjected to statistical analysis using two-way ANOVA and Newman–Keuls multiple post hoc procedures. Results: Neolix Neoniti files exhibited the maximum CFR (98.80) than EdgeFiles (80.47) and Neoendo Flex files (41.80) ( P = 0.0001). Reduction in CFR was observed with increase in the number of cycles of autoclaving (i.e., 0, 1, 5 cycles). Conclusion: Autoclaving has a negative influence on the CFR of the rotary NiTi files used. Neolix Neoniti files exhibited greater CFR than EdgeFiles and Neoendo Flex files.

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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

Cited by 5 publications

References 21 publications

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

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

An in-vitro comparative study of cyclic fatigue resistance of twisted files, Hyflex cm, Hyflex edm and Edgefile X3 after immersion in sodium hypochlorite and/or sterilization

Effect of autoclaving on the cyclic fatigue resistance of nickel-titanium rotary instruments: An in vitro study

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