Influence of Different Angles of Reciprocation on the Cyclic Fatigue of Nickel-Titanium Endodontic Instruments

Gambarini, Gianluca; Rubini, Alessio Giansiracusa; Sudani, D. Al; Gergi, Richard; Culla, Antonio; Angelis, Francesca De; Carlo, Stefano Di; Pompa, Giorgio; Osta, Nada El; Testarelli, Luca

doi:10.1016/j.joen.2012.05.019

Cited by 100 publications

(129 citation statements)

References 22 publications

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“…6,7,9,12 However, the reciprocating angle should only be increased to serve this purpose, without compromising instrument performance. A study by Gambarini et al 14 revealed that an increase in the number of cycles to failure of the tested files was achieved when the CW angle was as small as 30°. In the present study, WaveOne 90° CCW 30° CW demons-trated a better cutting efficiency and centering ratio than did WaveOne 150° CCW 30° CW.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments

Al-Sudani

Kaabi

Gamdi

et al. 2014

The Journal of Contemporary Dental Practice

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Purpose: The purpose of the present study was to investigate and compare the effect of different reciprocating movements and angles on the shaping ability of the WaveOne and the single-file ProTaper F2 using cone beam computed tomography (CBCT). Materials and methods:The mesiobuccal canals of 40 extracted maxillary molars, with curvatures of 20 to 45° were coded and randomly divided into 4 equal experimental groups according to the instrument used (ProTaper F2 file and WaveOne) and the reciprocation range, for both instruments, a 150° angle was used for cutting and a 30° angle was used for release. Group 1 -WaveOne primary 150° CCW rotation angle and 30° CW rotation angle; Group 2 -WaveOne 90° CCW rotation angle and 30° CW rotation angle; Group 3 -ProTaper F2 150° CW rotation angle and 30° CCW rotation angle; Group 4 -ProTaper F2 90° CW rotation angle and 30° CCW rotation angle. Canals were scanned before and after preparation using CBCT to evaluate the volumetric change, canal transportation and the canal centering ability at 2.6, 5.2 and 7.8 mm from the apex. The mean ± standard deviation (SD) values were analyzed, and the significance level was set at p ≤ 0.05. Results:There was no significant difference in the amount of dentin removed among the experimental groups, except that WaveOne 150°CCW 30°CW significantly showed the least volume of dentin removed (0.40 ± 0.9) at 7.8 mm. value of root canal transportation in both the mesial and furcal directions and in both the coronal and apical directions compared to the other groups. At the 7.8 level, WaveOne 150°CCW 30°CW yielded the highest mean centering ratio, whereas ProTaper F2 CW 150° CCW 30° yielded the lowest, statistically significant at p ≤ 0.05. Conclusion:The results of the present study demonstrated that differences among various reciprocating motions and angles could affect the shaping ability of a single-file Nickel-titanium (NiTi) instrument.

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Section: Discussionmentioning

confidence: 99%

The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments

Al-Sudani

Kaabi

Gamdi

et al. 2014

The Journal of Contemporary Dental Practice

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“…The term reciprocating motion includes some angles and movements on the NiTi file, which will influence the performance and fail resistance. The above has relation with the low risk of fracture by torsion because the rotating angles are smaller than deflection angles (Gambarini et al, 2012). Some authors have supported the use of reciprocating motion, concluding that this system showed a higher duration of the NiTi instruments and, therefore, a higher resistance to fatigue when compared with the continuous rotatory system (De-Deus et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

WaveOne: A Simple and Safe Way to Perform an Endodontic Treatment

Aracena

Betancourt

Borie

et al. 2014

Int. J. Odontostomat.

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Variations in the root canal's anatomy play an important role on endodontic therapy success, primarily in teeth with pulp necrosis. Traditionally, the preparation of root canals was performed with the use of stainless steel hand files; but over the years, new flexible instruments were introduced to prevent or minimize iatrogenic errors in shaping the root canal system. In most of recent publications, alternating rotation movements have been proposed as an alternative to continuous rotation in order to reduce the risk of fracture of the instrument and the root canal deformation. The aim of this article was to report a clinical case describing the simple way to perform the endodontic treatment of a maxillary premolar with three root canals, with the WaveOne reciprocating system.

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“…Different alloys and variations in cross-sectional designs have been suggested to increase the resistance to fatigue fracture and flexibility of these instruments (2,3). Additionally, reciprocating motion kinematics has also been demonstrated to extend the lifespan of a NiTi instrument and its resistance to cyclic fatigue in comparison with continuous rotation movement (2,4,5).…”

Section: Introductionmentioning

confidence: 99%

Bending resistance and cyclic fatigue life of a new single-file reciprocating instrument WaveOne Gold

Silva¹,

Tinoco²,

Tinoco³

et al. 2017

Eur Endod J

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Objective: The present study aimed to evaluate the bending resistance and cyclic fatigue fracture resistance of a new single-file reciprocating instrument called WaveOne Gold. Reciproc and WaveOne instruments were used as references for comparison. Methods: Sixty 25-mm NiTi instruments (Reciproc R25, WaveOne Primary and WaveOne Gold Primary) were tested. Flexibility was determined by applying 45° bending tests using a universal testing machine (n=10). A custom-made device was used during cyclic fatigue test (n=10), comprising a stainless steel artificial canal measuring 1.4 mm in diameter, 19 mm in total length with an 86° angle and 6 mm radius of curvature. Possible deformations at the helical shaft and mode of fracture were evaluated using scanning electron microscopy analysis. Statistical analysis was performed using one-way analysis of variance. Post hoc pair-wise comparisons were performed using Tukey's test for multiple comparisons (P<0.05). Results: WaveOne presented significantly higher bending resistance than the other tested systems (P<0.05), whereas Reciproc presented the lowest bending resistance (P<0.05). Reciproc revealed a significantly longer cyclic fatigue fracture resistance than the other systems (P<0.05). Conclusions: Although WaveOne Gold presented higher flexibility than WaveOne, no differences in the resistance to fatigue were observed between both systems. The Reciproc files were more flexible and resistant to fatigue for the angle of curvature of 86° and 6 mm radius than WaveOne and WaveOne Gold files.

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Influence of Different Angles of Reciprocation on the Cyclic Fatigue of Nickel-Titanium Endodontic Instruments

Cited by 100 publications

References 22 publications

The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments

The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments

WaveOne: A Simple and Safe Way to Perform an Endodontic Treatment

Bending resistance and cyclic fatigue life of a new single-file reciprocating instrument WaveOne Gold

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