Cyclic fatigue analysis of <scp>R</scp>eciproc <scp>R</scp>25® instruments with different kinematics

Arslan, Hakan; Alsancak, Meltem; Doğanay, Ezgi; Karataş, Ertuğrul; Çapar, İsmail Davut; Ertaş, Hüseyin

doi:10.1111/aej.12115

Cited by 16 publications

(16 citation statements)

References 12 publications

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“…The results showed that WO instrument used in reciprocating motion had a greater resistance to cyclic fatigue. Arslan et al (2015) investigated the cyclic fatigue resistance of Reciproc â instruments used with different kinematics whether in reciprocating motion (150°c ounterclockwise (CCW)-30°clockwise (CW), 270°C CW-30°CW, 360°CCW-30°CW) or in continuous rotation using a static testing set-up. All reciprocating motions resulted in a longer mean duration to failure compared to continuous rotation.…”

Section: Search Basismentioning

confidence: 99%

Movement kinematics and cyclic fatigue of NiTi rotary instruments: a systematic review

et al. 2016

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The aim of this review was to provide a detailed analysis of the literature concerning the correlation between different movement kinematics and the cyclic fatigue resistance of NiTi rotary endodontic instruments. From June 2014 to August 2015, four independent reviewers comprehensively and systematically searched the Medline (PubMed), EMBASE, Web of Science, Scopus and Google Scholar databases for works published since January 2005, using the following search terms: endodontics; nickel-titanium rotary files; continuous rotation; reciprocating motion; cyclic fatigue. In addition to the electronic searches, manual searches were performed to include articles listed in the reference sections of high-impact published articles that were not indexed in the databases. Laboratory studies in English language were considered for this review. The electronic and manual searches resulted in identification of 75 articles. Based on the inclusion criteria, 32 articles were selected for analysis of full-text copies. Specific analysis was then made of 20 articles that described the effects of reciprocating and continuous movements on cyclic fatigue of the instruments. A wide range of testing conditions and methodologies have been used to compare the cyclic fatigue resistance of rotary endodontic instruments. Most studies report that reciprocating motion improves the fatigue resistance of endodontic instruments, compared to continuous rotation, independent of other variables such as the speed of rotation, the angle or radius of curvature of simulated canals, geometry and taper, or the surface characteristics of the NiTi instruments.

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Section: Search Basismentioning

confidence: 99%

Movement kinematics and cyclic fatigue of NiTi rotary instruments: a systematic review

et al. 2016

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“…The NCF is useful for comparing different rotary instruments; however, it is not suitable for comparing the performance of different motions (11). Accordingly, previous studies have shown that changing the kinematics of the reciprocating motion can significantly affect the fracture resistance of NiTi instruments (7,(24)(25)(26)(27)(28)(29)(30). Thus, in the present study, the results were expressed as the time to fracture.…”

Section: Discussionmentioning

confidence: 94%

“…Differing outcomes in the fatigue resistance of instruments have also been described between similar RR motions, that is, when comparing Reciproc versus Waveone (24,25), and between single motions, for example, AR versus CR and RR versus CR (11,(26)(27)(28). Differing outcomes in the fatigue resistance of instruments have also been described between similar RR motions, that is, when comparing Reciproc versus Waveone (24,25), and between single motions, for example, AR versus CR and RR versus CR (11,(26)(27)(28).…”

Section: Discussionmentioning

confidence: 99%

“…In previous cyclic fatigue studies, distinct outcomes were found for different instruments that were activated in the same motion (5,10) due to differing designs and/or manufacturing processes. Differing outcomes in the fatigue resistance of instruments have also been described between similar RR motions, that is, when comparing Reciproc versus Waveone (24,25), and between single motions, for example, AR versus CR and RR versus CR (11,(26)(27)(28). In the present study, the motor, files, and artificial canals used were all standardised to focus on the effects of the type of motion on the cyclic fatigue resistance of the instruments.…”

Section: Discussionmentioning

confidence: 99%

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Classification and cyclic fatigue evaluation of new kinematics for endodontic instruments

et al. 2018

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This study evaluated the effect of new motions of the motor TriAuto ZX2 on the cyclic fatigue of endodontic instruments. Vortex Blue 35.06 instruments were divided into four groups (n = 10) and tested for fatigue in a curved artificial canal (90° and 2 mm radius) using the following motions: continuous rotation (CR), Optimum Torque Reverse (OTR) set at 180° and the Optimum Glide Path (OGP), which was tested at 90° and 240°. The time to fracture (TTF) and the lengths of the fractured fragments were recorded. The mean TTF was significantly different among the groups (anova, P < 0.05): OGP 90° (213.39 ± 27.45), OTR 180° (121.24 ± 17.03), OGP 240° (45.24 ± 5.61) and CR (8.43 ± 1.27). Weibull analysis confirmed the shortest life expectancy for CR and the longest survival for OGP at 90°. The resistance to fatigue was affected by motions and pre-set angles. The proprietary movements that are currently available for endodontic instruments were classified according to their kinematics.

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“…Fracture of the motor-driven rotary instrument is produced in two ways: cyclic fatigue, and torsional fatigue. Cyclic-fatigue fracture occurs when the instruments rotate freely in a curvature, generating tension/compression cycles in the region of maximal flexure until fracture (7,8). The incidence of fracture by cyclic fatigue in handheld instruments is 1-6% as compared with that of rotary instruments, which is 0.4-5% (9-11).…”

Section: Duringmentioning

confidence: 99%

Automatic Electronic Device Used for the Evaluation of Cyclic-Fatigue Resistance of Nickel-Titanium Instruments

Gaitán-Fonseca

Lara-Alvarado

Flores-Reyes

et al. 2017

Odovtos - Int J Dent Sc

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The aim of this study was to evaluate the cyclic-fatigue fracture of different Nickel-Titanium motor-driven rotary instruments (ProTaper® Universal, ProFile®, and Mtwo® systems) in artificial canals by means of an Automatic Electronic Device (AED). The study was performed using NickelTitanium instruments 25/0.06 evaluated in canals with a 45-degree curvature and 2-mm radius. The analyses evaluated two parameters: fracture by cyclic fatigue, and time of fracture; in addition, the length of separated fragment was evaluated. Medians and range values were calculated for each group. Data were analyzed by the Kruskall-Wallis and Mann-Whitney U tests to determine statistical difference. The ProFile motor-driven rotator system exhibited highest resistance to fracture due to cyclic fatigue and highest fracture time compared with the ProTaper and Mtwo systems (p <0.05). The equipment proposed in this study (AED) demonstrated efficiency for recording information, automation, scheduled work times and durations, cycle number, time of fracture, pressure changes and, principally control of the human factor. RESUMENEl objetivo del presente estudio fue evaluar la fractura a la fatiga cíclica de diferentes instrumentos rotatorios de Niquel-Titanio (sistemas ProTaper® Universal, ProFile® y Mtwo®) en conductos artificiales por medio de un Dispositivo Electrónico Automático (DEA). Se usaron instrumentos de Niquel-Titanio 25/0.06, los cuales se evaluaron en conductos con una curvatura de 45 grados y 2 milímetros de radio. Se analizaron dos parámetros: Fractura a la fatiga cíclica y tiempo a la fractura; además se evaluó la longitud del fragmento separado. Medianas y rangos fueron calculados para cada uno de los grupos. Los resultados fueron analizados por las pruebas de Kruskall-Wallis y U de Mann-Whitney para determinar diferencias estadísticas. El Sistema ProFile mostró una mayor resistencia y tiempo a la fractura en comparación con los sistemas ProTaper y Mtwo (p <0.05). El equipo propuesto en este estudio (DEA) demostró eficiencia para el registro de la información, tiempos de trabajo y duración, número de ciclos, tiempo a la fractura, cambios en la presión y principalmente control del factor humano.

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Cyclic fatigue analysis of Reciproc R25® instruments with different kinematics

Cited by 16 publications

References 12 publications

Movement kinematics and cyclic fatigue of NiTi rotary instruments: a systematic review

Movement kinematics and cyclic fatigue of NiTi rotary instruments: a systematic review

Classification and cyclic fatigue evaluation of new kinematics for endodontic instruments

Automatic Electronic Device Used for the Evaluation of Cyclic-Fatigue Resistance of Nickel-Titanium Instruments

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