Effect of nickel-titanium alloys on root canal preparation and on mechanical properties of rotary instruments

Vivan, Rodrigo Ricci; Costa, Vanessa Abreu Sanches Marques; Conti, Letícia Citelli; Duque, Jussaro Alves; Bramante, Clóvis Monteiro; Só, Marcus Vinícius Reis; Alcalde, Murilo Priori; Duarte, Marco Antônio Húngaro

doi:10.1590/1807-3107bor-2022.vol36.0085

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…We assumed that a slight reduction of WL after glide path confection is more predictable (and expected) [26] for the clinician -than a variation of WL at the end of shaping. Despite reciprocating and rotary gliding instruments used in this study had the same tip size and taper (15/0.04), as well as, non-active tips -the difference between their designs (the reciprocating/X1 Blue has a convex triangular crosssectional, while the rotary/SRF has a quadrangular crosssection) [2,[27][28][29] might have influenced our results. We observed that rotary kinematics produced slightly shorter measurements at the glide path stage.…”

Section: Discussionmentioning

confidence: 99%

Influence of rotary and reciprocating kinematics on the accuracy of an integrated apex locator

et al. 2022

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We evaluated in vitro the influence of nickel‐titanium instruments kinematics on the accuracy and variation of root canal working length measurements, performed with an integrated apex locator, at glide path and at the end of shaping. Forty‐four mandibular incisors, included in an alginate model, were allocated at random to two groups: reciprocating and rotary. Working length was determined at glide path stage and at the end of shaping. Measurements given by the integrated apex locator were matched with visual measurements. The apex locator accuracy was based on inter‐group comparison. The variation in working length was based on intra‐group comparison. Kinematics influenced the accuracy of measurements only after shaping (p < 0.05), and not in the glide path (p > 0.05). Rotary had values closer to the visual measurements. Diminishing of measures occurred after shaping for reciprocating (p < 0.05); and at glide‐path stage for rotary (p > 0.05). The integrated apex locator was more accurate with rotary kinematics.

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Section: Discussionmentioning

confidence: 99%

Influence of rotary and reciprocating kinematics on the accuracy of an integrated apex locator

et al. 2022

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“…The torsion tests were performed based on the International Organization for Standardization ISO 3630- 1 (1992) specification using a torsion machine as previously described 17 , 18 , 19 . A total of 40 instruments of each type ( n = 20; 25 mm of length) were used to establish maximum torque torsional strength and angular deflection to failure under two experimental conditions, at room temperature (21°C ± 1°C) and body temperature (36°C ± 1°C).…”

Section: Torsional Fatigue Testmentioning

confidence: 99%

“…The NiTi engine-driven instruments ensure safe and efficient root canal preparation of curved canals 1 , 2 . However, the risk of instrument separation continues to be a concernment for the clinicians due to this occurrence could affect the clinical outcome of endodontic treatment 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the aim of this study was to evaluate the impact of body temperature on the torsional strength and angular deflection of experimental NiTi instruments manufactured from Blue and Gold technologies and with identical designs (tip diameter, taper, and cross-section. The null hypothesis was as follow: 1 there is no significant difference in the torsional strength of the instruments at 21 °C and 36 °C, and 2 there is no significant difference in the angular deflection between the instruments at 21 °C and 36 °C temperature.…”

Section: Introductionmentioning

confidence: 99%

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Influence of temperature on the torsional properties of two thermally treated NiTi rotary instruments

et al. 2023

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This study aimed to evaluate the influence of temperature on torsional strength and angular deflection of two experimental NiTi rotary instruments manufactured from Blue and Gold thermal treatments and with identical cross-sections. A total of 40 experimental NiTi instruments 25.06 and with a triangular cross-section and manufactured from Blue and Gold thermal treatments were used (n=20). The torsional test was performed in the 3 mm from the tip of the instrument according to ISO 3630-1. The torsional test evaluated the torsional strength and angular deflection to failure at room temperature (21°C ± 1° C) and body temperature (36°C ±1°C). The fractured surface of each fragment was observed by using scanning electron microscopy (SEM). Data were analyzed using an unpaired t test for inter and intra-group comparison and the level of significance was set at 5%. The results showed that the body temperature did not affect the torsional strength and angular deflection of the instruments when compared with room temperature (P>0.05). However, at body temperature, the Blue NiTi instruments presented significantly lower angular deflection in comparison with Gold NiTi instruments (P<0.05). There was no significant difference regarding the torsional strength of the instruments at body temperature (P>0.05). The temperature did not affect the torsional strength of the instruments manufactured from Blue and Gold technology. However, the Blue NiTi instruments presented significantly lower angular deflection than Gold instruments at 36°C temperature.

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Endodontic Ni–Ti Rotary Instruments for Glide-path, Are They Still Necessary and How to Think about the Ideal Instrument?

Bhandi,

Reda,

Testarelli

et al. 2024

The Journal of Contemporary Dental Practice

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Effect of nickel-titanium alloys on root canal preparation and on mechanical properties of rotary instruments

Cited by 4 publications

References 39 publications

Influence of rotary and reciprocating kinematics on the accuracy of an integrated apex locator

Influence of rotary and reciprocating kinematics on the accuracy of an integrated apex locator

Influence of temperature on the torsional properties of two thermally treated NiTi rotary instruments

Endodontic Ni–Ti Rotary Instruments for Glide-path, Are They Still Necessary and How to Think about the Ideal Instrument?

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