Optimum glide path motion is safer than continuous rotation of files in glide path preparation

Gavini, Giulio; Akisue, Eduardo; Kawakami, Dirce Akemi Sacaguti; Caldeira, Celso Luiz; Candeiro, George Táccio de Miranda; Vivan, Rodrigo Ricci; Calefi, Pedro Henrique Souza; Alcalde, Murilo Priori; Duarte, Marco Antônio Húngaro

doi:10.1111/aej.12519

Cited by 6 publications

(8 citation statements)

References 34 publications

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“…In addition, it could be speculated that the OGP 90°k inematic cause the least reduction in the deformation capacity of the le. The continuous rotation kinematic is more prone to taper lock and torsional stresses, as previously reported [17,21,25,29], which is consistent with our results.…”

Section: Discussionsupporting

confidence: 93%

“…The angular rotation to le fracture differed depending on the kinematics used. High torsional loading during glide path preparation of constricted or narrow canals was also simulated, resulting in the maximum torsional strength and angular rotation of the le to fracture [21][22][23][24][25]. The authors evaluated the torsional properties at the last 3 mm of the le, as this area is more prone to fracture than the 5 mm region [28].…”

Section: Discussionmentioning

confidence: 99%

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Impact of kinematics on the efficiency and safety of an engine-driven file for glide path preparation in MB2 canals of maxillary molars

et al. 2022

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To evaluate the in uence of different kinematics on the e ciency and safety of an engine-driven le for glide path preparation in second mesiobuccal canals (MB2) of maxillary molars. In addition, the torsional resistance of the le was assessed after use. Methodology:Thirty-six maxillary rst and second molars with two canals in the mesiobuccal root were selected and the anatomy of the canals was veri ed by micro-CT. The teeth were divided into 4 groups (n = 9) according to the kinematics used for glide path preparation: continuous rotation (CR), 30°/150°r eciprocation (REC 30°/150°), 30°/90° reciprocation (REC 30°/90°), and 90° optimum glide path motion (OGP 90°). The duration of the procedure, number of canals in which the le reached the full working length (RFWL), canal volume before and after the procedure, rate of le fracture, and le torsional strength after use were evaluated. The ANOVA and Tukey tests or Kruskal-Wallis and Dunn tests were used for statistical analysis. ResultsNo signi cant differences among the groups were found for procedure duration, success at reaching the FWL, distance from the le to apex, and number of fractured les (P > 0.05). The CR group showed a signi cant decrease in rotation angle compared with REC 90° and OGP 90° groups (P < 0.05). There was no signi cant difference in canal volume among the groups (P > 0.05). ConclusionThe type of kinematics used did not affect the e ciency, success rate, and shaping ability of the le during glide path preparation. CR seems to induce more torsional stress than the other kinematics.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Impact of kinematics on the efficiency and safety of an engine-driven file for glide path preparation in MB2 canals of maxillary molars

et al. 2022

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“…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%

“…The torsional fatigue occurs during instruments rotation and the tip locks on the root canal walls 3 , 6 . Regardless of the cause of instrument failure, the risk should be reduced 3 , 4 .…”

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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Evaluation of the Quantity of Extruded Debris through the Apical Foramen Using Optimum Glide Path Motion: An ex vivo study

Büker

Ali

Kaya

et al. 2023

Preprint

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Objectives: The study was evaluated apically extruded debris from teeth that were instrumented with full-sequenced files using a new kinematic technique (optimum glide path motion). Materials and Methods: The specimens were divided into four groups (n = 18) based on the kinematics of rotation motion (RM), 90° optimum glide path (OGP) motion, 90° clockwise (CW)–90° counterclockwise (CCW) motion, and 90° CW–120° CCW motion. Pre-weighed Eppendorf tubes were used to collect debris. The weight of the dry extruded debris was calculated by deducting the initial tube weight from the end weight. The Kruskal–Wallis test and the least significant difference for pairwise comparisons test were used to statistically assess the data (P < 0.05). Results: In comparison to the RM, the 90° OGP motion extruded the least quantity of debris, which was statistically significant (P < 0.05). Conclusions:The findings suggest that a 90° OGP motion delivers the best results regarding extruded debris through the apical foramen. Clinical Relevance: Within the limitations of the study, Optimum glide path (OGP) motion resulted in less debris extrusion compared to the rotation motion. Clinical application of full-sequenced rotary systems in OGP motion may be reliable and beneficial.

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Optimum glide path motion is safer than continuous rotation of files in glide path preparation

Cited by 6 publications

References 34 publications

Impact of kinematics on the efficiency and safety of an engine-driven file for glide path preparation in MB2 canals of maxillary molars

Impact of kinematics on the efficiency and safety of an engine-driven file for glide path preparation in MB2 canals of maxillary molars

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

Evaluation of the Quantity of Extruded Debris through the Apical Foramen Using Optimum Glide Path Motion: An ex vivo study

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