Comparison between Single-file Rotary Systems: Part 2—The Effect of Length of the Instrument Subjected to Cyclic Loading on Cyclic Fatigue Resistance

Azim, Adham A.; Tarrosh, Mohamed; Azim, Katharina A.; Piasecki, Lucila

doi:10.1016/j.joen.2018.07.021

Cited by 14 publications

(15 citation statements)

References 24 publications

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“…Previous studies showed that XPS has excellent resistance to cyclic fatigue compared to WOG [19][20][21][22]. However, the torque at failure was found to be very low (0.84 ± 0.11 N·cm) [21] which is due to the file design.…”

Section: Discussionmentioning

confidence: 91%

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Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

Alfadley

Alrajhi

Alissa

et al. 2020

International Journal of Dentistry

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e aim of this study was to assess the shaping ability of the XP Shaper (XPS) file in severely curved canal models under simulated body temperature and compare it with that of the WaveOne Gold (WOG) file. Ninety-six simulated root canals were equally distributed into XPS and WOG systems to be shaped by eight files each. Files were assessed under a stereomicroscope prior to canal shaping to detect deformation if any. e canals were shaped at 35 ± 1°C using the X-Smart Plus motor. Images of the canals were obtained before and after instrumentation using a stereomicroscope to measure the amount of removed resin from both the inner and outer curvature sides at apex (0 mm) and 3 mm and 6 mm from the apex. e shaping time was calculated. e data were statistically analyzed by the independent t-test at 5% significance level. e XPS and WOG systems shaped the canals in 37.0 ± 9.5 and 62.6 ± 11.3 seconds (P < 0.05), respectively. At the apex level, the amount of resin removal in both sides did not show a significant difference between the tested groups (P > 0.05). At 3 mm and 6 mm levels, the WOG removed more resin than XPS at both sides (P < 0.05). In XPS, deformation was observed in four files: one file after the first use, one file after the fourth use, and two files after the sixth use. In WOG, two files were deformed: one file after the fifth use and one file after the sixth use. One XPS file was fractured after the sixth use. In short, XPS and WOG files can be used in shaping severely curved canals as they showed the ability to maintain the original shape with minimal transportation. Both file systems showed signs of deformation after use with a lower number of deformed files observed in WOG throughout the experiment.

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Section: Discussionmentioning

confidence: 91%

“…XPS achieves a final apical preparation of at least 30/0.04 [17][18][19]. XPS was found to have superior cyclic fatigue performance compared to other file systems [19][20][21][22]. WaveOne Gold (WOG; Dentsply Sirona, York, PA) system is an updated version of the WaveOne (WO; Dentsply Sirona) single-file system.…”

Section: Introductionmentioning

confidence: 99%

Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

Alfadley

Alrajhi

Alissa

et al. 2020

International Journal of Dentistry

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“…To optimally analyze the properties of a heat treatment, it should be used the same designed instruments at the same conditions due to remove bias caused by different volumes of the alloy, cross-sectional shape and cutting performance (21,23). Cross-sectional design and type of mechanical movement are considered crucial factors in the affection of cyclic fatigue resistance of an endodontic instrument (24,25).…”

Section: Discussionmentioning

confidence: 99%

Differences in cyclic fatigue lifespan between two different heat treated NiTi endodontic rotary instruments: WaveOne Gold vs EdgeOne Fire

Gambarini¹,

Galli²,

Nardo³

et al. 2019

J Clin Exp Dent

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Background: Aim of this study is to investigate the cyclic fatigue resistance of the Gold treated WaveOne Gold and the Firewire treated EdgeOne Fire instruments. The null hypotesis was that there were no differences between the lifespan of Gold treated and FireWire treated instruments when subjected to cyclic fatigue tests. Material and Methods: 40 new NiTi instruments with a length of 25 mm were tested: 20 Wave One Gold Medium (WOG), tip size 35 and variable taper (Dentsply Maillefer, Ballaigues, Switzerland) and 20 Edge One Fire (EOF) (EdgeEndo, Albuquerque, New Mexico) tip size 35 and the same variable taper. A mobile support for the electric handpiece and a stainless-steel block containing the artificial canals were used. The same artificial root canal with a 90 degrees angle of curvature and 2 mm radius of curvature was used for all the tested instruments and the WOG counter-clock wise reciprocating motion with an engaging angle of 150° and a disengaging angle of 30° at 300 rpm, was selected for the test. All instruments were inserted at the same length (18mm) and then rotated in the same reciprocating motion until fracture occurred: the time was stopped as soon as the fracture was visible and video-recorded with a 1/100 sec chronometer. Differences among groups were statistically evaluated with an analysis of variance test ANOVA (significance level was set at p<0.05). Results: Mean values of time to fracture (TtF) for EOF instruments were 28,00 seconds (SD +/-2,64) and for WOG instruments were 14,67 seconds (SD +/-2,41). Statistical analysis found significant differences between the TtF of the two instruments (p<0,05). Conclusions: Firewire instruments resulted to be about two times more resistant to cyclic fatigue when compared with identical instruments made with Gold treatment.

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“…In the last decades, considerable progress in endodontic instruments, equipment and materials has resulted in simpler, safer and more efficient root canal procedures. For instance, single-file nickel-titanium systems prevent cross-infections and optimize root canal treatment (Azim, et al, 2018a;Azim, et al, 2018b). Single-file systems have gained wide interest and a growing body of evidence regarding physical and microbiological features supports the choice of these instruments for endodontic therapy.…”

Section: Introductionmentioning

confidence: 99%

“…Single-file systems have gained wide interest and a growing body of evidence regarding physical and microbiological features supports the choice of these instruments for endodontic therapy. Most current single-file systems are available in different tapers and usually exhibit innovative manufacturing processes that provide great flexibility such as XP-Endo Shaper (FKG Dentaire, La Chaux-de-Fonds, Switzerland), Reciproc Blue (VDW GmbH, Munich, Germany), and ProDesign Logic (Easy Equipamentos Odontológicos, Belo Horizonte, MG, Brazil) (Azim, et al, 2018b).…”

Section: Introductionmentioning

confidence: 99%

Bacterial removal in flattened root canals with different tapers of ProDesign Logic single-file system

Sandini

Godoy

Prado

et al. 2021

RSD

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Objective: This study evaluated the bacterial removal in flattened root canals after preparation with different tapers of ProDesign Logic instruments. Methodology: Fifty-five mandibular incisors with flattened root canals were contaminated with a pure culture of Enterococcus faecalis ATCC 29212 for 21 days at 37ºC. Root canals preparation was performed using ProDesign Logic and 0.9% sterile saline solution for irrigation. The specimens were randomly allocated to three experimental groups (n = 15) according to the taper of the instrument used: 25.03, 25.04, or 25.06. Intracanal bacteriological samples were taken before (S1) and after (S2) preparation and the number of colony-forming units per milliliter (CFU/mL) was calculated. Differences in bacterial counts before and after treatment, within each group, were analyzed by the paired t-test. Groups were compared by ANOVA with a post hoc test. The level of significance was set at p <0.05. Results: Mature biofilm formation was confirmed at root canal walls by scanning electron microscopy. Bacterial colonies were significantly reduced in all experimental groups at S2 compared to S1 (p <0.001). No significant difference was observed between groups regarding the percentage of bacterial reduction (p >0.05). Conclusion: Preparation of flattened root canals using ProDesign Logic instruments with tapers of 0.03, 0.04 and 0.06 resulted in similar planktonic and bacterial biofilm reduction. None of the instruments rendered root canals completely free of bacteria.

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Comparison between Single-file Rotary Systems: Part 2—The Effect of Length of the Instrument Subjected to Cyclic Loading on Cyclic Fatigue Resistance

Cited by 14 publications

References 24 publications

Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

Differences in cyclic fatigue lifespan between two different heat treated NiTi endodontic rotary instruments: WaveOne Gold vs EdgeOne Fire

Bacterial removal in flattened root canals with different tapers of ProDesign Logic single-file system

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