Comparison of torque, force generation and canal shaping ability between manual and nickel-titanium glide path instruments in rotary and optimum glide path motion

Htun, Pyae Hein; Ebihara, Arata; Maki, Keiichiro; Kimura, Shunsuke; Nishijo, Miki; Tokita, Daisuke; Okiji, Takashi

doi:10.1007/s10266-019-00455-1

Cited by 31 publications

(21 citation statements)

References 31 publications

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“…For new files (group A), S-One showed significant higher torsional resistance compared to M-Two. This result is in accordance with part of the current literature, indeed the role of thermal treatments on torsional resistance is not completely clarified [5,13]. Many studies declared that the presence of heat-treated files do not significant affect or even enhance, the torsional resistance of an instruments [5,19].…”

Section: Discussionsupporting

confidence: 86%

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Torque Range, a New Parameter to Evaluate New and Used Instrument Safety

et al. 2020

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The aim of the present study is to evaluate operative torque, torque at failure and the difference between these two values—the “torque range”—of two different NiTi files. We also sought to evaluate and compare these parameters for new and used files. Forty S-One 20.06 and forty M-Two 20.06 were tested, divided in four equal groups (n = 10) for each brand. Ten instruments from each brand performed three root canal treatments each on standardized extracted single-rooted teeth. Afterwards, each group was subjected to the following two tests: operative torque and torsional resistance. Mean values for all the tested groups were calculated. The results for new instruments showed that S-One developed significantly higher operative torque, but higher torsional resistance. The results for used instruments showed that the S-One 20.06 developed less operative torque and higher mean torsional resistance value compared to the M-Two. Moreover, the percentage reduction of both values was significantly higher for M-Two. The results of the present study showed a safer torsional behavior of the S-One. These results could be related to the heat treatment and the manufacturing process.

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Section: Discussionsupporting

confidence: 86%

“…To date in literature several studies investigate the parameters that could influence the torsional resistance. These factors are the cross section, the metal mass of the instrument, the heat treatments and the metallurgical properties of the nickel titanium rotary (NTR) instruments [5].…”

Section: Introductionmentioning

confidence: 99%

Torque Range, a New Parameter to Evaluate New and Used Instrument Safety

et al. 2020

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“…The use of rotary file systems was reported to induce less shaping force but more torque than the manual stainless steel files ( 4 , 5 ). Past studies revealed that the force and torque exerted on the tooth during canal shaping directly affected the file fatigue ( 6 - 9 ) as well as the root canal wall ( 10 ).…”

Section: Introductionmentioning

confidence: 99%

Analysis of Force and Torque with XP Shaper and OneCurve Systems during Shaping of Narrow Canals

et al. 2020

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Objective: The purpose of this laboratory-based study was to compare the shaping forces and torques developed by the XP Shaper (FKG Dentaire SA, La Chaux-de-fonds, Switzerland) and OneCurve (Micro-Mega, Besancon, France) systems during shaping of narrow canals. Methods: Mandibular premolars with a single canal were divided equally into two groups; XP Shaper and OneCurve (n=16 each). In both groups, the canals were shaped with XP Shaper file (30/01) or OneCurve file (25/O6) that was inserted three times until it reached the canal length. The tooth was surrounded by water under controlled simulated intracanal temperature throughout the experiment. The inward and outward peak forces and the peak torques were recorded and analyzed statistically using the Mann-Whitney test. The shaping times were analyzed using Student’s t-test. The significance level was set at 5%. Results: In both groups, the developed forces in both directions and the torques increased with the successive insertions of the file. In the two groups, the inward peak forces ranged from 0.33 to 3.12 N, while the outward peak forces ranged from 0.09 to 1.96 N. In the three insertions, the XP Shaper showed significantly lower peak forces in both directions. The peak torque developed in both groups ranged from 0.12 to 1.52 N.cm. XP Shaper had significantly lower torque values in all the insertions than OneCurve. The XP Shaper system was able to completely shape the canals in 33.4 seconds while the OneCurve system was able to completely shape the canals in 32.8 seconds. Conclusion: The XP Shaper system showed favorably lower force and torque values during canal shaping compared with the OneCurve system.

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“…The cross-section of the HyFlex EDM GPF varies along its length, being quadratic at the tip, trapezoidal in the middle, and triangular at the shaft. The exibility of the HyFlex EDM GPF confers this instrument the ability to maintain the apical canal curvature despite its greater taper [17]. [18].…”

Section: Introductionmentioning

confidence: 99%

Glide Path Enlargement of Curved Molar Canals Using HyFlex EDM Glide Path File versus PathFile: A Comparative Study of Preparation Time and Postoperative Pain

Han

Hou

2020

Preprint

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Background: This randomized clinical trial aimed to compare the preparation time and severity of postoperative pain between the HyFlex Electric Discharge Machine (EDM) Glide Path File (GPF) and PathFile.Methods: Eighty patients who were treated by the same specialist were enrolled. After access cavity preparation, the patients were randomly assigned to receive glide path enlargement with either HyFlex EDM GPF or PathFile. ProTaper Next X1 and X2 files were used to prepare the canals. The time of preparation was assessed and the severity of postoperative pain over the next 7 days was recorded. The preparation time and the postoperative pain scores were compared using one-way analysis of variance (ANOVA) (P ≤ 0.05).Results: Glide path enlargement was significantly shorter with HyFlex EDM GPF (27.828 ± 2.345 s) than with PathFile (48.942 ± 2.864 s) (P < 0.001). The highest postoperative pain score was recorded on the first day and the pain decreased over time in both groups. GPF group patients reported significantly less postoperative pain than PathFile group patients overall (P < 0.05).Conclusion: Postoperative pain and glide path preparation time could be reduced by using the HyFlex EDM GPF system.Trial registration: PKUSSNCT, PKUSSNCT-17B12, Registered 24 October 2017

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Comparison of torque, force generation and canal shaping ability between manual and nickel-titanium glide path instruments in rotary and optimum glide path motion

Cited by 31 publications

References 31 publications

Torque Range, a New Parameter to Evaluate New and Used Instrument Safety

Torque Range, a New Parameter to Evaluate New and Used Instrument Safety

Analysis of Force and Torque with XP Shaper and OneCurve Systems during Shaping of Narrow Canals

Glide Path Enlargement of Curved Molar Canals Using HyFlex EDM Glide Path File versus PathFile: A Comparative Study of Preparation Time and Postoperative Pain

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