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Studies X7

Evaluation of the Amount of Root Canal Dentin Removed and Apical Transportation Occurrence after Instrumentation with ProTaper Next, OneShape, and EdgeFile Rotary Systems

Abstract

Introduction

The aim of this study was to evaluate the amount of root canal dentin removed and apical transportation occurrence after instrumentation of mesiobuccal canals of maxillary molars with ProTaper Next (PTN [Dentsply Maillefer, Ballaigues, Switzerland]), OneShape (OS [MicroMega, Besançon, France]), and EdgeFile (EF [Edge Endo, Albuquerque, NM]) rotary systems.

Methods

Twenty-seven mesiobuccal canals of maxillary molars were used. Canals were randomly divided into 3 groups for canal preparation: PTN, EF X3, or OS (n = 9 for each group). Micro–computed tomographic imaging was used to measure apical transportation (mm) and the volume of dentin removed (mm3). The amount of dentin removed was measured for the coronal portion and for the whole canal length. Superposition of pre- and postoperative cross-sectional apical slices were used to measure apical transportation at 1 mm from the apex; the differences were evaluated using the Kruskal-Wallis test and Wilcoxon analysis. The Spearman correlation coefficient was used to display the relationship between variables for each group. The significance level was set at P < .05.

Results

The percentages of the amount of dentin removed on the coronal portion and the amount removed for the whole canal length were statistically similar between groups (P > .05). The average amount of apical transportation for the PTN, OS, and EF X3 were 0.197, 0.263, and 0.218 mm, respectively. Statistically, there were no significant differences between the 3 rotary instruments for apical transportation.

Conclusions

The amount of dentin removed for the coronal third portion and the whole canal length was similar for the PTN, OS, and EF X3 rotary instruments. Although there were differences in the sizes of apical enlargement, no apical transportation was observed in any of the instrumentation systems.

Click Here for the published JOE article.

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Studies

Differences in cyclic fatigue lifespan: WaveOne Gold vs EdgeOne Fire.

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

Gambarini G, Galli M, Di Nardo D, Seracchiani M, Donfrancesco O, Testarelli L.

J Clin Exp Dent. 2019 July 1;11(7):e609-e613.
* Article Number: 55839
* Publication Types: research-article
* Article section: Operative Dentistry and Endodontics

Abstract

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 electrichandpiece and a stainless-steel block containing the artificial canals were used. The same artificial root canal witha 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-re- corded with a 1/100 sec chronometer. Differences among groups were statistically evaluated with an analysis ofvariance 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 WOGinstruments were 14,67 seconds (SD +/- 2,41). Statistical analysis found significant differences between the TtF ofthe 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.

Key words: Endodontics, NiTi, Waveone Gold, EdgeOne Fire, Cyclic Fatigue.

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

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Studies

Quantitative Analysis of the Antimicrobial Efficacy of Two Rotary Files

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Studies

Cyclic Fatigue and Torsional Failure of EdgeTaper Platinum Endodontic Files at Simulated Body Temperature

Ahmed Jamleh, BDS, MSc, PhD, Amjad Alghaihab, DMD,
Abdulmohsen Alfadley, BDS, MSc, FRCD(C), Hussam Alfawaz, BDS, MS, Abdullah Alqedairi, BDS, MS, and Khalid Alfouzan, BDS, MSEd

Introduction: The aim of this in vitro study was to compare the cyclic fatigue resistance and torsional resis-tance of EdgeTaper Platinum (ETP) with those of Pro-Taper Gold (PTG) at simulated body temperature.

 

Methods: ETP and PTG files with #25 tip size were selected. Cyclic fatigue tests were performed in a stain-less steel artificial canal until file fracture occurred. The time to fracture was recorded. For the torsional resis-tance testing, the apical 5 mm of the file was firmly secured with acrylic resin, and the assembly was fixed over torque gauge device. A uniform torsional stress was applied with continuous rotation motion until frac-ture occurred. The torque at failure was recorded. Both experiments were conducted at 35 1 C. Fractured sur-faces were tested via scanning electron microscopy. Sta-tistical analysis was performed using independent Student t test at 5% significance level.

Results: The ETP had superior cyclic fatigue resistance than PTG (P < .01). However, it exhibited lower torsional resis-tance (P < .05). The ETP and PTG showed typical fea-tures of cyclic and torsional fatigue behavior under scanning electron microscopy.

Conclusions: The ETP exhibited superior resistance to cyclic fatigue but failed to show any improvement in the torsional resistance compared with PTG. (J Endod 2019;45:611–614)

Read Full Study Here: Cyclic Fatigue and Torsional Failure of EdgeTaper Platinum Endodontic Files at Simulated Body Temperature

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Studies

Clinicians Report – Highly Rated by Evaluators

CR Highly Rated August 2015.pdf

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Studies

Comparison in Cyclic Fatigue Resistance Between EdgeTaper Platinum and ProTaper Gold After One and Three Stimulated Clinical Uses

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Studies

Analysis of Single File Rotary and Reciprocating Glidepath Systems

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Studies

Mechanical Properties of Various Glide Path Instruments

Highlights

•Cyclic resistance, torsional resistance, and bending stiffness of glide path files made of different alloys were compared using custom devices.

•EdgeGlidePath made from heat-treated wire showed higher cyclic resistance than ProGlider and One G.

•One G made from conventional NiTi wire showed higher torsional resistance than EdgeGlidePath and ProGlider.

•One G made from conventional NiTi wire showed higher bending stiffness than EdgeGlidePath and ProGlider.

Abstract

Introduction

The aim of this study was to compare the cyclic fatigue, torsional resistance, and bending stiffness of single-file glide path preparation nickel-titanium instruments.

Methods

ProGlider (#16/progressive taper; Dentsply Sirona, Ballaigues, Switzerland), One G (#14/.03; Micro-Mega, Besancon, France), and EdgeGlidePath (#16/progressive taper; Edge Endo, Albuquerque, NM) were tested. For the bending stiffness test, the instrument was bent to a 45° angle along the main axis while 3 mm of the tip was secured. Cyclic fatigue resistance was measured during pecking movement, whereas the file was rotated within a reproducible simulated canal with a 3-mm radius and a 90° angle of curvature. The ultimate torsional strength and toughness were evaluated using a custom device. While tightly holding the end of the file at 3 mm, a rotational load of 2 rpm speed was applied until fracture. The results were analyzed using 1-way analysis of variance and Tukey post hoc comparison. A microscopic inspection was performed on the surface of a separate instrument using a scanning electron microscope.

Results

EdgeGlidePath showed superior cyclic fatigue resistance compared with the other systems. One G showed higher maximum torsional strength than the others. One G showed the largest distortion angle and the highest toughness followed by EdgeGlidePath and ProGlider (P < .05). One G also showed larger bending stiffness than the others, whereas EdgeGlidePath showed a larger residual angle than the others (P < .05).

Conclusions

Conventional wire showed higher toughness and torsional resistance than M-Wire and heat-treated nickel-titanium instruments. However, heat-treated wire showed higher cyclic resistance than conventional wire and M-Wire.

 

Read Full Study Here: Mechanical Properties of Various Glide Path Preparation Nickel-titanium Rotary Instruments

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Transportation Study

For printable PDF version click here: Cone-beam Computed Tomographic Analysis of Canal Transportation and Centering Ability of Single-file Systems

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AAE18 Research Evaluates EdgeEndo® Files

Abstracts of Research

These abstracts are Oral and Poster Research that will be presented at AAE18 . Abstracts evaluated EdgeEndo® files, with the majority of studies evaluating the EdgeTaper Platinum™ vs ProTaper® Gold. Abstracts appear as they were submitted by the presenters. The letters in the upper left corner represent the type of presentation: OR for Oral Research Presentation, PR for Research Presentation.

All studies show EdgeEndo® files are better or just as good!

 

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