scholarly journals Cleaning Effectiveness of a Reciprocating Single-file and a Conventional Rotary Instrumentation System

2016 ◽  
Vol 10 (1) ◽  
pp. 704-713 ◽  
Author(s):  
Fredson Marcio Acris de Carvalho ◽  
Leonardo Cantanhede de Oliveira Gonçalves ◽  
André Augusto Franco Marques ◽  
Vanessa Alves ◽  
Carlos Eduardo da Silveira Bueno ◽  
...  
Keyword(s):  
Apical Part ◽  
Reciprocating Motion ◽  
Root Canals ◽  
Single File ◽  
Rotary Instruments ◽  
Continuous Rotation ◽  
Kolmogorov Smirnov ◽  
Rotation Motion ◽  
La Jolla ◽  
Smirnov Test

Objective: To compare cleaning effectiveness by histological analysis of a reciprocating single-file system with ProTaper rotary instruments during the preparation of curved root canals in extracted teeth. Methods: A total of 40 root canals with curvatures ranging between 20 - 40 degrees were divided into two groups of 20 canals. Canals were prepared to the following apical sizes: Reciproc size 25 (n=20); ProTaper: F2 (n=20). The normal distribution of data was tested by the Kolmogorov-Smirnov test and the values obtained for the test (Mann-Whitney U test, P < .05) were statistically analyzed using the GraphPad InStat for the Mac OS software (GraphPad Software, La Jolla, CA, USA). Results: There were no significant differences in remaining debris (P > .05) between the two groups. Conclusion: The application of reciprocating motion during instrumentation did not result in increased debris when compared with continuous rotation motion, even in the apical part of curved canals. Both instruments resulted in debris in the canal lumen, irrespective of the movement kinematics applied.

Apical Transportation of ProGlider and ProTaper Next Activated with Different Motions

2016 ◽  
Vol 39 (12) ◽  
pp. 625-628
Author(s):  
Hakan Arslan ◽  
Damla O. Kirici ◽  
Ahmet D. Uygun ◽  
Ruslan Khalilov ◽  
Yahya Güven ◽  
...  
Keyword(s):  
Root Canal ◽  
Rotation Group ◽  
Reciprocating Motion ◽  
Movement Kinematics ◽  
Root Canals ◽  
Continuous Rotation ◽  
Apical Transportation ◽  
Canal Transportation

Purpose The aim of this study was to investigate the apical transportation of the ProGlider and ProTaper Next using 3 different motions (150° clockwise [CW]; 0° counter clockwise [CCW], 270° CW-30° CCW; and [360° CW] continuous rotation). Materials and Methods 36 simulated, curved, plastic training blocks were randomly distributed into 3 groups for treatment according to the movement kinematics used for ProGlider (Dentsply Maillefer) followed by ProTaper Next (Dentsply Maillefer) instruments (n = 12): 150° CW-30° CCW, 270° CW-30° CCW, and 360° CW (continuous rotation). Pre- and post-instrumentation photographs were taken from the root canals in a standardized manner. Root canal transportation was calculated at 1, 2, 3, 4, and 5 mm from the apical terminus of the canal. Data were analyzed using a Kruskal-Walis H test (p = .05). Results At the 1- and 2-mm levels, both reciprocating motions (150° CW-30° CCW and 270° CW-30° CCW) resulted in less transportation than those of continuous rotation (p<.05). However, there were no significant differences between the groups at the 3-, 4-, and 5-mm levels (p>.05). Conclusions Both reciprocating motions were found to have less canal transportation than the continuous rotation group at the 1- and 2-mm levels. This is the first study about the use of the ProGlider and ProTaper Next activated by different motions. Reciprocating motion can be beneficial for ProGlider and ProTaper Next to reduce transportation of root canals.

scholarly journals Assessment of cyclic fatigue resistance of Protaper Next and WaveOne Gold in different kinematics

2020 ◽  
Vol 44 (1) ◽  
Author(s):  
Amira Galal Ismail ◽  
Manar Galal ◽  
Nehal Nabil Roshdy
Keyword(s):  
Fatigue Resistance ◽  
Fatigue Testing ◽  
Cyclic Fatigue ◽  
Rotation Group ◽  
Radius Of Curvature ◽  
Testing Device ◽  
Reciprocating Motion ◽  
Continuous Rotation ◽  
Custom Made ◽  
Rotation Motion

Abstract Background The purpose of the current study was to inspect and compare the influence of applying continuous rotation and reciprocation motions on the cyclic fatigue resistance of Protaper Next (PTN) file (X2) and WaveOne Gold (WOG) Primary file in simulated canals. Twenty Protaper Next files(X2) and 20 WaveOne Gold Primary files were included in this study. A cyclic fatigue testing device was employed to test the cyclic resistance of each file in different motions. The testing device has an artificial custom-made stainless-steel canal with a 60° angle of curvature and a 2-mm radius of curvature. The files were randomly divided into 4 groups; group 1: PTN in continuous rotation, group 2: PTN in reciprocation, group 3: WOG in continuous rotation and group 4: WOG in reciprocation. All the instruments were rotated until fracture occurred, and the time to fracture was recorded in seconds using a digital chronometer. The number of cycles to fracture (NCF) was calculated. The data were analyzed statistically (p < .05). Results Results represented that when using either continuous rotation motion or reciprocating motion, WOG files showed a significantly longer time until failure than PTN files (p < 0.001). The time till fracture increased significantly, when using both types of files with a reciprocating filing motion. Conclusion Within the confinement of this study, WOG file in reciprocation showed higher cyclic fatigue resistance than PTN in both continuous rotation and reciprocating motion. The reciprocating motion enhances both files behavior in terms of cyclic fatigue resistance.

scholarly journals Cleaning ability of rotary NiTi systems with different kinematics

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Amira Galal Ismail ◽  
Mohamed Mokhtar Nagy ◽  
Manar Galal
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Adaptive Systems ◽  
Reciprocating Motion ◽  
Continuous Rotation ◽  
Significant Difference ◽  
Adaptive Motion ◽  
Microscope Images ◽  
Rotation Motion ◽  
Scanning Electron

Abstract Background The aim of this study was to compare the cleaning ability of rotary NiTi systems with different kinematics: ProTaper Next (PTN) (continuous rotation motion), WaveOne Gold (WOG) (reciprocating motion), and Twisted File Adaptive (TFA) (adaptive motion). Methodology Sixty mesiobuccal roots from extracted mandibular molars were divided into three groups (n = 20): PTN, prepared by ProTaper Next; WOG, prepared by WaveOne Gold system; and TFA, prepared by Twisted File Adaptive systems. Teeth were longitudinally split into two halves for evaluation by scanning electron microscope. Images were analysed for debris and smear layer scores using the scoring system described by Hülsmann et al. (J Endod 23:301–6, 1997). Results No significant difference was found between the three groups in the coronal one third (P = 0.071). However, the TFA group recorded a significantly higher percentage of debris in the middle and apical thirds (P < 0.001 and P < 0.001, respectively) Conclusions Under the conditions of this study, adaptive motion produced more debris than the reciprocating and the continuous rotating motions.

scholarly journals Nickel-Titanium Single-file System in Endodontics

2015 ◽  
Vol 16 (10) ◽  
pp. 834-839
Author(s):  
Alberto Dagna
Keyword(s):  
Root Canal ◽  
File System ◽  
Nickel Titanium ◽  
Root Canals ◽  
Single File ◽  
Continuous Rotation ◽  
Bending Stresses ◽  
Single Use ◽  
Canal Shaping ◽  
Clinical Cases

ABSTRACT Aim This work describes clinical cases treated with a innovative single-use and single-file nickel-titanium (NiTi) system used in continuous rotation. Background Nickel-titanium files are commonly used for root canal treatment but they tend to break because of bending stresses and torsional stresses. Today new instruments used only for one treatment have been introduced. They help the clinician to make the root canal shaping easier and safer because they do not require sterilization and after use have to be discarded. A new sterile instrument is used for each treatment in order to reduce the possibility of fracture inside the canal. The new One Shape NiTi single-file instrument belongs to this group. Case description One Shape is used for complete shaping of root canal after an adequate preflaring. Its protocol is simple and some clinical cases are presented. It is helpful for easy cases and reliable for difficult canals. Conclusion After 2 years of clinical practice, One Shape seems to be helpful for the treatment of most of the root canals, with low risk of separation. After each treatment, the instrument is discarded and not sterilized in autoclave or re-used. Clinical significance This single-use file simplifies the endodontic therapy, because only one instrument is required for canal shaping of many cases. The respect of clinical protocol guarantees predictable good results. How to cite this article Dagna A. Nickel-Titanium Single-file System in Endodontics. J Contemp Dent Pract 2015;16(10): 834-839.

scholarly journals Apical transportation in simulated root canals prepared using HyFlex CM, WaveOne Gold and manual technique

2020 ◽  
Vol 24 (3) ◽  
pp. 334-339
Author(s):  
Gabriela Bonacina ◽  
Ana Carolina Neis Cifali ◽  
Rafaela Chies Hartmann ◽  
Maína De Aguiar Pinto ◽  
Maristela Gutierrez De Borba ◽  
...  
Keyword(s):  
Descriptive Statistics ◽  
Reciprocating Motion ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Continuous Rotation ◽  
Apical Transportation ◽  
Before And After ◽  
Imagej Software ◽  
Post Hoc ◽  
Main Effects

Objective: To assess the apical transportation in simulated root canals with different curvature angles prepared using manual instrumentation and rotary and reciprocating motions. Methods: Sixty simulated root canals were prepared using manual instrumentation (Flexofile K-file) (MT), continuous rotation (HyFlex CM) (HF), and reciprocating motion (WaveOne Gold) (WG). A trained operator prepared the canals, and the apical enlargement was standardized up to a #25 file in all systems tested. Two different curvature angles of the simulated root canals were tested: 70° and 50°. Overlapping photographs of the simulated root canals, before and after root canal preparation, were used to measure the apical transportation (mm), using the ImageJ software. Descriptive statistics (mean and standard deviation) were analyzed and the groups were compared with two-way ANOVA followed by Tukey’s post-hoc, with α=5%. Results: There was a statistically significant interaction between the effects of group and angle in the apical transportation (F = 3.740; p = 0.031). Simple main effects analysis showed that HyFlex CM produced a significantly lower apical transportation when compared to WaveOne Gold (p = 0.02) and the manual technique (p < 0.01), regardless of the angle. However, there were no differences between WaveOne Gold and manual technique in canals with the 70° angle (p>0.05). The group with the highest mean apical transportation was the MT, with 0.0917 mm, followed by WG and HF, with 0.0633 and 0.0325, respectively. Conclusion: Simulated root canals prepared with rotary motion (HyFlex CM) showed the lowest apical transportation, followed by the reciprocating motion (WaveOne Gold). The manual technique showed the most unfavorable results, with the highest apical transportation.

scholarly journals Ex-vivo Smear Layer Removal Efficacy of Two Activated Irrigation Techniques After Reciprocating Instrumentation in Curved Canals

2017 ◽  
Vol 11 (1) ◽  
pp. 512-519 ◽  
Author(s):  
Tamara Costa Lopes Schiavotelo ◽  
Marcelo Santos Coelho ◽  
Luis Cardoso Rasquin ◽  
Daniel Guimarães Pedro Rocha ◽  
Carlos Eduardo Fontana ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Smear Layer ◽  
Reciprocating Motion ◽  
Passive Ultrasonic Irrigation ◽  
Root Canals ◽  
Maxillary Molars ◽  
Single File ◽  
Significant Difference ◽  
Ultrasonic Irrigation ◽  
Level Of Agreement

Introduction: This study aimed to compare the effectiveness of two activated irrigation techniques in removing the smear layer after single-file reciprocating instrumentation in curved canals. Materials and Methods: Sixty distobuccal roots of maxillary molars were standardized to create a closed system, and then instrumented using WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland) instruments. Fifty-four specimens were randomly distributed into 3 groups for final irrigation: Non-activated irrigation, passive ultrasonic irrigation (PUI), and EndoActivator (EA;Dentsply Maillefer, Tulsa, USA) irrigation. All specimens received 3 mL of 17% EDTA for 1 minute, followed by irrigation with 6 mL of 2.5% NaOCl. The apical, middle and cervical thirds of the specimens were analyzed using scanning electronic microscopy (SEM), and the amount of remaining smear layer on the canal walls was rated by three examiners using a five-category scoring system. Kendall’s concordance coefficient was used to assess inter-rater agreement. Kruskal-Wallis and Mann-Whitney (Bonferroni) tests were used to compare the scores. Results: Kendall’s concordance coefficient was ≥ 0.7, indicating an excellent level of agreement between the raters. No statistically significant difference in irrigation techniques efficacy for removal of the smear layer (p=0.061) was found for the apical third. The scores attributed to the specimens irrigated with the EA system were significantly lower than those of the other groups in the cervical and middle thirds (p< 0.05). Conclusions: The efficacy of the EA system in removing the smear layer in the cervical and middle thirds of root canals instrumented with reciprocating motion was significantly higher than that of either PUI or non-activated irrigation. Both EA and PUI performed similarly in apical third.

scholarly journals Shaping ability of the profile 25/0.06 and protaper F2 in rotary motion, and reciproc in simulated canals

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e6109
Author(s):  
Gül Çelik ◽  
Murat Maden ◽  
Ahmet Savgat ◽  
Hikmet Orhan
Keyword(s):  
File Systems ◽  
Apical Part ◽  
Middle Part ◽  
Nickel Titanium ◽  
Human Teeth ◽  
Root Canals ◽  
Single File ◽  
Working Length ◽  
Shaping Ability ◽  
Different Levels

Background Since the introduction of nickel–titanium (Ni–Ti) instruments to dentistry, a wide variety of Ni–Ti instruments have become commercially available. These Ni–Ti instruments are expensive, which limits their usage in developing countries and forces practitioners to use instruments repeatedly. Another problem is the possible prion cross-contamination associated with the multiple usage of endodontic instruments. In addition, the use of these instruments requires new skills and experience. In this article, the shaping capacities of two conventional rotary file systems, ProFile 25/0.06 and ProTaper F2, were reviewed and compared with the Reciproc single-file system. Methods A total of 45 simulated canals with 40° curvature, in clear resin blocks, were prepared using conventional rotary systems consisting of ProFile orifice shaping (OS) #3 and final flaring #25/.06, Reciproc R25, and ProTaper shaping file SX and finishing file F2. Pre-and post-instrumentation images were analyzed at ten different levels, using AutoCAD 2007 software. The measurement positions were defined in 1-mm intervals: positions 0–3 established the apical part, positions 4–6 constituted the middle part, and positions 7–10 established the coronal part of the canal. The amount of removed resin, the transportation, instrumentation time, change in working length (WL), instrumentation fractures, and the presence of ledge were evaluated. Data were analyzed using ANOVA, Kruskal–Wallis and independent t-test (p < 0.001). Results ProFile removed the least resin (p < 0.001) and caused less transportation than Reciproc and ProTaper, in total (p < 0.001). ProTaper caused more transportation ProFile and Reciproc in the apical part (p < 0.000). Reciproc caused more transportation than ProTaper and ProFile (p < 0.001), and the transportation tendency toward the inner aspect of the curvature in the middle part. Reciproc caused the less transportation than ProFile and ProTaper in the coronal part. The transportations tended to occur toward the outside of the curvature, except the middle part with Reciproc and at points 5 and 6 with ProTaper. There were no significant differences among the groups in terms of maintaining the original WL. Reciproc was significantly faster than the others group (p < 0.001). Only one instrument fracture (25/0.06 ProFile) was noted. All groups showed one ledge each. Discussion The results of the present study showed that both ProFile 25/06 and ProTaper F2, combined with a file used for coronal enlargement (OS3 and SX), have the potential to create satisfactory canal shape in the curved root canals. Further studies using real human teeth are needed to confirm our results.

scholarly journals Evaluation of Apically Extruded Debris Using Continuous Rotation, Reciprocation, or Adaptive Motion

2018 ◽  
Vol 29 (3) ◽  
pp. 245-248 ◽  
Author(s):  
Ozgur Genc Sen ◽  
Burcu Bilgin ◽  
Sibel Koçak ◽  
Baran Can Sağlam ◽  
Mustafa Murat Koçak
Keyword(s):  
Root Canal ◽  
Calculated Data ◽  
Dry Weight ◽  
Distilled Water ◽  
Reciprocating Motion ◽  
Root Canals ◽  
Continuous Rotation ◽  
Adaptive Motion ◽  
The Difference ◽  
Root Canal Instrumentation

Abstract The aim of this study was to compare the amount of apically extruded debris during root canal instrumentation using ProTaper Next (PTN), Twisted File (TF) Adaptive, and Reciproc instruments. Forty-five extracted human maxillary canines were selected and randomly assigned into 3 groups. The root canals were prepared using PTN instruments with continuous rotation (n=15), TF Adaptive instruments with adaptive motion (n=15), Reciproc instruments with reciprocating motion (n=15). During the preparations, canals were irrigated using distilled water and material extruded apically was collected in pre-weighed Eppendorf tubes. After a 5-day drying period in an incubator, the tubes were weighed and the dry weight of the extruded debris was calculated. Data distributions were assessed via the Shapiro-Wilk test, and groups were compared via the Kruskal-Wallis test. The greatest amount of debris extruded by TF Adaptive and the least by PTN, but the difference was insignificant between groups (p=0.259). All instrumentation systems were associated with debris extrusion.

scholarly journals Evaluation of Curved Canal Transportation Using the Neoniti Rotary System with Reciprocal Motion: A Comparative Study

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Mohsen Aminsobhani ◽  
Arvin Rezaei Avval ◽  
Fatemeh Hamidzadeh
Keyword(s):  
Root Canal ◽  
Lateral View ◽  
Two Dimensions ◽  
Reciprocating Motion ◽  
Root Canals ◽  
Rotation Method ◽  
Continuous Rotation ◽  
Before And After ◽  
Canal Transportation ◽  
The Ideal

The ideal root canal preparation is where the original canal morphology is maintained during the biomechanical preparation. Preparation of curved canals has always been a challenge to clinicians. Better results have been suggested for a single NiTi instrument with reciprocating motion than the conventional continuous rotation method in the preparation of curved root canals. Although the Neoniti rotary system is not suggested to be used with reciprocal motion, running a pilot study, we found that it could be possible. The present study aimed to investigate if shaping curved canals using the Neoniti rotary system with reciprocal motion leads to better results in terms of root canal transportation. One hundred acrylic j-shape canal simulator endoblocks were used in this study. Five preparation sequences were applied: GPS followed by A1#20 (GPS + A1#20), GPS followed by A1#20 and then A1#25 (GPS + A1#20 + A1#25), GPS followed by A1#25 (GPS + A1#25), hand file followed by A1#20 (hand file + A1#20), and GPS followed by A1#20 (with reciprocal motion) (GPS + A1#20(reciprocal)). Pictures were taken from blocks once before and once after preparation from two dimensions. Before-and-after pictures were superimposed in Photoshop software. Measurements were performed in Digimizer. The number of autoreverses and pecking motions was recorded after reviewing the recorded videos. Data were analyzed in SPSS, version 26. A p value of less than 0.05 was considered statistically significant. The group GPS + A1#20 + A1#25 had more transportation compared with the others, at apical, middle, and coronal thirds not only in the frontal view but also in the lateral view. Other groups were not significantly different. The number of peckings and autoreverses was significantly less when A1#25 was used after GPS and A1#20. When A1#20 was used with reciprocal motion, it had less peckings compared with the same file with continuous rotation, and no autoreverses were observed in that group. Using Neoniti files with reciprocal motion might result in less instrument fatigue and favorable results, with respect to canal anatomy preservation. Using A1#20 before A1#25 also will decrease the stress on the instrument during preparation. However, this may lead to significantly more canal transportation.

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