scholarly journals Effect of glide path on transportation promoted by NiTi and M-Wire instruments

2018 ◽  
Vol 21 (1) ◽  
pp. 104
Author(s):  
Tatiane Pires Nogueira ◽  
Ellen Roberta Lima Bessa ◽  
Eduardo Da Costa Nunes ◽  
André Augusto Franco Marques ◽  
Lucas Da Fonseca Roberti Garcia ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Root Canal ◽  
Polyester Resin ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Path Creation ◽  
Dental Instruments ◽  
Glide Path ◽  
Significant Difference ◽  
Before And After

<p><strong>Objective:</strong> To evaluate the effect of glide path creation on transportation promoted by NiTi and M-Wire instruments. <strong>Material and Methods: </strong>Sixty polyester resin blocks containing a simulated root canal were distributed into four groups (n=15), according to the protocols/systems used for root canal preparation: GPR group - glide path + Revo-S system; R group - no glide path + Revo-S system; GPPN group - glide path + ProTaper Next system and PN group - no glide path + ProTaper Next system. Root canals were photographed before and after preparation, and the images were superimposed to evaluate the transportation at the apical, middle and coronal thirds. The time spent to perform preparation was also measured (seconds). Data were submitted to the non-parametric Kruskal-Wallis test (p&lt;0.05) for statistical analysis. <strong>Results:</strong> In the apical third, there was no significant difference among groups (p&gt;0.05). GPR and R groups were similar in the middle third (p&gt;0.05). However, the transportation value in GPR group was statistically higher in comparison with GPPN and PN groups (p&lt;0.05). In the coronal third, GPR and R groups were similar (p&gt;0.05). Only R group presented significant difference in comparison with GPPN and PN groups (p&lt;0.05). There was no difference among groups about time spent to perform preparation (p&gt;0.05). <strong>Conclusion:</strong> None of the systems were capable of maintaining the original trajectory of the simulated root canal, and the glide path had no effect on the transportation promoted by instruments.</p><p><strong>Keywords</strong></p><p>Dental instruments; Endodontics; Root canal preparation.</p>

scholarly journals Comparison of Canal Transportation and Centering Ability of ProGlider and WaveOne Gold Glider in Curved Canals

2020 ◽  
Vol 14 (04) ◽  
pp. 639-643
Author(s):  
Gabriela Behne Miró ◽  
Flávia Sens Fagundes Tomazinho ◽  
Edson Pelisser ◽  
Mariana Maciel Batista Borges ◽  
Marco Antônio Hungaro Duarte ◽  
...  
Keyword(s):  
Root Canal ◽  
File Systems ◽  
Root Canal Preparation ◽  
Volume Increase ◽  
Volume Variation ◽  
Glide Path ◽  
Significant Difference ◽  
Before And After ◽  
Canal Transportation ◽  
Level Of Significance

Abstract Objectives The aim of this study was to compare the volume variation and maintenance of the root canal position when using the ProGlider 16.02 (PG) and the WaveOne Gold Glider 15.02 (WOGG) file systems for glide path preparation. Materials and Methods Twenty-four moderately curved mesiobuccal canals of maxil-lary first molars were selected and randomly divided into two groups: PG and WOGG. The selected teeth were scanned using microtomography before and after root canal preparation to assess centralization and linear transport at 1, 3, 5, and 7 mm from the apical foramen. Statistical Analysis The data were analyzed with the Mann–Whitney U test. The level of significance was 5%. Results There were no significant differences in volume variation or root canal transport (p > 0.05). There was a significant difference in the centralization of the root canal at 3 mm from the foramen (p < 0.05). Conclusions WOGG and PG instruments presented similar results regarding the root canal volume increase and transport. WOGG caused higher decentralization at 3 mm from the apical foramen.

scholarly journals Effects of different glide path techniques on the amount of extruded debris and preparation times during root canal preparation

2020 ◽  
Vol 14 (3) ◽  
pp. 187-190
Author(s):  
Damla Kırıcı ◽  
Simay Koç ◽  
Alper Kuştarcı
Keyword(s):  
Root Canal ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Glide Path ◽  
Working Length ◽  
Significant Difference ◽  
Molar Teeth ◽  
Group 3 ◽  
Group 2 ◽  
Post Hoc

Background.This study purposed to compare the effect of new single glide path files on extruded apical debris and total preparation times during root canal preparation with the WaveOne Gold system. Methods. Thirty-six extracted human lower molar teeth with mesiobuccal canal curvature angles of 25‒35° were randomly splited to three groups. In group 1, the glide path was created with WaveOne Gold Glider (WGG) file at working length (WL); in group 2, the glide path was created with ProGlider file (PG); in group 3, the glide path was not performed. In all the groups, the root canals were shaped with WaveOne Gold Primary (WOG) reciprocating files at WL. Apically extruded debris during instrumentation was picked up into pre-weighed Eppendorf tubes. The weight of the dry extruded debris was calculated by subtracting the pre- and post-instrumentation weights of the tubes in each group. The total time elapsed during the canal preparation was calculated with a chronometer. The data were analyzed using one-way ANOVA and post hoc Tukey tests. Results. The WGG/WOG group extruded significantly fewer debris than the WOG and PG/WOG groups (P<0.05). There was no significant difference between the WOG and PG/WOG groups (P>0.05). The WGG/WOG and PG/WOG groups were significantly faster than the WOG group. Conclusion. The amount of debris extruded apically significantly diminished when conventional WGG was implemented before using WOG. The total preparation time significantly diminished when the WOG file was used in combination with reciprocating and rotary glide path preparation techniques.

scholarly journals Comparison of Canal Transportation and Centering Ability of One-G, EdgeGlidePath, and Neolix: A MicroComputed Tomography Study of Curved Root Canals

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Shiva Shojaeian ◽  
Niloofar Mortezapour ◽  
Fatemeh Soltaninejad ◽  
Nazanin Zargar ◽  
Babak Zandi ◽  
...  
Keyword(s):  
Root Canal ◽  
Niti Alloy ◽  
Microcomputed Tomography ◽  
Micro Ct ◽  
Root Canals ◽  
Path Creation ◽  
Glide Path ◽  
Instrument Type ◽  
Before And After ◽  
Canal Transportation

Aims. A glide path is created prior to root canal instrumentation by nickel-titanium (NiTi) rotary files to increase the efficiency and safety of cleaning and shaping. This study aimed to assess root canal transportation in use of different glide path files in curved canals. Materials and Methods. 30 sound mesiobuccal root canals of mandibular molars with 20° to 40° curvature were selected and randomly assigned to 3 groups of EdgeGlidePath (EGP, EdgeEndo), One-G (Micro-Mega), and Neolix (Neoniti). The specimens were scanned before and after glide path creation by microcomputed tomography (micro-CT). The pre- and postoperative micro-CT scans were superimposed, and the degree of canal transportation and centering ratio were measured at 1, 3, 5, and 7 mm distances from the apical foramen. Statistical Analysis. The data were analyzed by two-way and one-way ANOVA. Results. The effects of distance from the apical foramen and instrument type and the interaction effect of the two were not significant on the centering ability of the files or canal transportation. Conclusion. EdgeGlidePath, One-G, and Neolix files fabricated from the conventional NiTi alloy or heat-treated M-Wire alloy showed similar performance regarding centering ability and canal transportation in glide path preparation in curved canals.

scholarly journals Evaluation Algorithm of Root Canal Shape Based on Steklov Spectrum Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Dongqing Wu ◽  
Jian Gao ◽  
Xiaoli Hu ◽  
Zhengtao Xiao ◽  
Zhuwei Huang ◽  
...  
Keyword(s):  
Root Canal ◽  
Evaluation Method ◽  
Complete Removal ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Need To Evaluate ◽  
Before And After ◽  
Evaluation Algorithm ◽  
Steklov Spectrum ◽  
Volume Difference

In recent years, we have seen more and more interest in the field of medical images and shape comparison motivated by the latest advances in microcomputed tomography (μCT) acquisition, modelling, and visualization technologies. Usually, biologists need to evaluate the effect of different root canal preparation systems. Current root canal preparation evaluation methods are based on the volume difference, area difference, and transportation of two root canals before and after treatment. The purpose of root canal preparation is to minimize the volume difference and ensure the complete removal of the smear layer. Previous methods can reflect some general geometric differences, but they are not enough to evaluate the quality of root canal shape. To solve this problem, we proposed a novel root canal evaluation method based on spectrum and eigenfunctions of Steklov operators, which can be served as a better alternative to current methods in root canal preparation evaluation. Firstly, the ideal root canal model was simulated according to the root canal model before and after preparation. Secondly, the Steklov spectrum of the two models was calculated. Thirdly, based on the spectrum and the histogram of the Gaussian curvature on the surface, the weight of each eigenvalue was computed. Therefore, the Steklov spectrum distance (SSD), which measures shape difference between the root canals, was defined. Finally, the calculation method that quantifies the root canal preparation effect of root canals was obtained. Through experiments, our method manifested high robustness and accuracy compared with existing state-of-the-art approaches. It also demonstrates the significance of our algorithm’s advantages on a variety of challenging root canals through result comparison with counterpart methods.

scholarly journals Apical Debris Extrusion during Root Canal Preparation with ProTaper Next and Mani Silk Rotary Systems: An in vitro Study

2016 ◽  
Vol 1 (2) ◽  
pp. 66-69
Author(s):  
Madhusudhana Koppolu ◽  
Chinni Suneelkumar ◽  
Anumula Lavanya ◽  
Ram Basam
Keyword(s):  
Social Sciences ◽  
Root Canal ◽  
In Vitro Study ◽  
Root Canal Preparation ◽  
Initial Weight ◽  
Root Canals ◽  
The Social ◽  
Significant Difference ◽  
Final Weight

ABSTRACT Aim To evaluate the amount of apically extruded debris after the preparation of root canals in extracted human single-rooted teeth using ProTaper Next and Mani Silk rotary systems. Materials and methods A total of 40 freshly extracted human single-rooted teeth with mature apices and straight root canal were selected and similar length were instrumented with ProTaper Next and Mani Silk rotary systems. Debris and irrigant extruded during instrumentation were collected into preweighed Eppendorf tubes. The Eppendorf tubes were then stored in an incubator at 68°C for 5 days. The weight of the extruded debris was determined by subtracting the initial weight from the final weight. Statistical analysis Data analysis was carried out using the Statistical Package for the Social Sciences (SPSS) version 20. Postweights were compared with an independent t test for 2 groups. Results Both instruments were associated with apical debris extrusion. There was no significant difference between the ProTaper Next and Mani Silk instruments in terms of mean weight of apically extruded debris. Conclusion There was no significant difference among the groups in terms of mean weight of apically extruded debris. How to cite this article Koppolu M, Basam R, Suneelkumar C, Lavanya A. Apical Debris Extrusion during Root Canal Preparation with ProTaper Next and Mani Silk Rotary Systems: An in vitro Study. J Oper Dent Endod 2016;1(2):66-69.

scholarly journals The influence of working length on the reduction of biofilm and planktonic bacteria in oval canals with reciprocating instrumentation

2021 ◽  
Vol 10 (5) ◽  
pp. e9810514765
Author(s):  
Arieth Cristina Sacomani ◽  
Fernanda Tessaro Cintra ◽  
Adriana de Jesus Soares ◽  
Marcos Frozoni
Keyword(s):  
Bacterial Growth ◽  
Root Canal ◽  
Negative Control ◽  
Bacterial Biofilm ◽  
Control Group ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Planktonic Bacteria ◽  
Working Length ◽  
Significant Difference

To evaluate the influence of reciprocating single-file instrumentation with different working lengths (WL) on the reduction of planktonic bacteria and bacterial biofilm in Enterococcus faecalis-contaminated oval root canals. Methodology: Fifty-five human single-rooted canines were used. Fifty were inoculated with E. faecalis for 21 days for biofilm formation. To confirm the formation of biofilm adhered to the root canal wall, 5 contaminated samples from positive control group were analyzed by SEM. Samples were assigned into 3 groups (n = 15) according to working length determined, G+1 root canal preparation 1 mm beyond the apical foramen, G0 root canal preparation at the major foramen, and G-1 root canal preparation 1 mm short of the major foramen. Five roots were not inoculated to serve as a negative control. Bacteriological samples were collected prior to preparation, initial collection (S1), and after reciprocating instrumentation (S2) by disaggregating biofilm to quantify the reduction of planktonic bacteria and intracanal biofilm at different WL. Bacterial quantitation was performed using colony-forming units per milliliter (CFU / mL) count. Statistical analysis was performed at the significance level of 0.05. Results: No bacterial growth was observed in the negative control. All positive controls demonstrated bacterial growth; S1 from all teeth were positive for bacteria with no significant difference. The post-hoc analysis showed G+1 promoting a significantly higher disinfection than G-1 (p<0,05) and G-1 similar disinfection to G0 (P=962). Conclusion: Instrumentation as close as possible to major foramen or beyond it improves decontamination in oval root canals with reciprocating instrumentation.

scholarly journals A microcomputed tomography evaluation of the shaping ability of three thermally-treated nickel-titanium rotary file systems in curved canals

2018 ◽  
Vol 47 (1) ◽  
pp. 325-334 ◽  
Author(s):  
Zhuwei Huang ◽  
Jingjing Quan ◽  
Jia Liu ◽  
Wen Zhang ◽  
Xiaolei Zhang ◽  
...  
Keyword(s):  
Root Canal ◽  
File Systems ◽  
Microcomputed Tomography ◽  
Nickel Titanium ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Before And After ◽  
Shaping Ability ◽  
Thermally Treated

Objective To evaluate the shaping ability of three thermally-treated rotary nickel-titanium (NiTi) systems including ProTaper Next (PTN), HyFlex™ CM (HFCM) and HyFlex™ EDM (HFEDM) during root canal preparation in simulated root canals. Methods A total of 45 simulated root canals were divided into three groups ( n = 15) and prepared with PTN, HFCM or HFEDM files up to size 25. Microcomputed tomography (microCT) was used to scan the specimens before and after instrumentation. Volume and diameter changes, transportations and centring ratios at 11 levels of the simulated root canals were measured and compared. Results HFEDM caused significantly greater volume increases than HFCM and PTN in the entire root canal and in the apical and middle thirds. HFCM removed the least amount of resin in the coronal third compared with HFEDM and PTN. Overall, HFCM caused significantly less transportation in the apical 2 mm and was better centred than PTN in the apical 3 mm. Conclusion Under the conditions of this study, all systems prepared curved canals without significant shaping errors and instrument fracture. PTN and HFCM cut less resin than HFEDM. HFCM stayed centred apically and cut the least material coronally.

Quantitative Analysis of Root Canal System and Apical Part with Vertucci Type II Configuration Following Preparation with Three Different Preparation Systems: A Micro-computed Tomography Study

2020 ◽  
Vol 16 (4) ◽  
pp. 438-443
Author(s):  
Ali Keleş ◽  
Cangül Keskin
Keyword(s):  
Quantitative Analysis ◽  
Root Canal ◽  
Apical Part ◽  
Type Ii ◽  
Micro Computed Tomography ◽  
Chi Square ◽  
Root Canals ◽  
Significant Difference ◽  
Before And After ◽  
Canal Systems

Objective: Isthmuses are narrow communications between root canals, and form as the result of the merging of the two root canals widening in a buccolingual direction. This widening causes the high ovality of isthmuses. The shaping and cleaning of all root canal systems are regarded as one of the major difficulties in long-oval shaped root canals. This study aims to make quantitative analysis of Vertucci type II root canal systems following preparation with Self- Adjusting file (SAF), Reciproc or Revo-S. Methods: Major diameter and roundness values were measured at the level 1.2 mm from apical foramen before and after preparation. A ‘post-preparation node’ point was described when the minimum minor diameter value was smaller than major diameter of apical 1.2 mm. Data were analysed using one-way ANOVA, Tukey and Chi-square tests. Results: Preparation resulted in a significant increase in the major diameter values regardless of the instrumentation (p = 0.000). Preparation with Reciproc led to the significant increase in roundness values (p = 0.000), whereas no significant difference was detected in specimens prepared with SAF (p = 0.21) and Revo-S (p = 0.15). Conclusion: Root canal preparation with SAF, Reciproc and Revo-S led to a significant increase in the major diameter of apical 1.2 mm and resulted in high frequencies of the post-preparation node.

scholarly journals Multidimensional Analysis of Curved Root Canal Preparation Using Continuous or Reciprocating Nickel-titanium Instruments

2018 ◽  
Vol 12 (1) ◽  
pp. 32-45 ◽  
Author(s):  
Iussif Mamede-Neto ◽  
Álvaro Henrique Borges ◽  
Ana Helena Gonçalves Alencar ◽  
Marco Antonio Hungaro Duarte ◽  
Manoel Damião Sousa Neto ◽  
...  
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Reference Points ◽  
Multidimensional Analysis ◽  
Cone Beam ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Computed Tomography Scans ◽  
Before And After ◽  
Canal Transportation

Objective: To evaluate transportation (T) and centering ability (CA) of root canal preparations using continuous or reciprocating nickel-titanium endodontic files. Materials and Methods: Ninety-six mesiobuccal root canals of mandibular first and second molars were randomly divided into 6 groups (n=16) according to the rotary file used: 1. ProTaper Next; 2. ProTaper Gold; 3. Mtwo; 4. BioRaCe; 5. WaveOne Gold; 6. Reciproc. Root canals were prepared according to manufacturer’s instructions. Cone beam computed tomography scans were obtained before and after root canal preparation. Measurements were made at six different reference points: 2, 3 and 4 mm from the apex and 2, 3 and 4 mm below furcation in different directions. Results: The greatest Mesiodistal (MD) Transportation (T) was found for Reciproc files (p<0.05), and the greatest buccolingual (BL) T, for Reciproc, ProTaper Gold and ProTaper Next files (p<0.05). The greatest Mesiodistal (MD) Centering Ability (CA) was found for BioRaCe files (p<0.05), and the greatest Buccolingual (BL) CA, for BioRaCe and Mtwo files (p<0.05). Conclusion: All systems produced root canal transportation. No file system achieved perfect CA of root preparation. Reciproc files had the greatest MD T and BL T. BioRaCe files had the greatest MD CA, whereas BL CA was similar for BioRaCe and Mtwo files.

scholarly journals Apical Transportation and Centering Ability After Root Canal Filling Removal Using Reciprocating and Continuous Rotary Systems: A CBCT Study

2019 ◽  
Vol 13 (04) ◽  
pp. 613-618 ◽  
Author(s):  
Etienny da Silva Arruda ◽  
Emílio Carlos Sponchiado-Júnior ◽  
Mariana Travi Pandolfo ◽  
Márcio Acris de Carvalho Fredson ◽  
Lucas da Fonseca Roberi Garcia ◽  
...  
Keyword(s):  
Root Canal ◽  
Material Removal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Universal System ◽  
Root Canals ◽  
Computed Tomographic ◽  
Apical Transportation ◽  
Significant Difference ◽  
Before And After

Abstract Objective To evaluate the apical transportation and centering ability promoted by reciprocating and continuous rotary systems after root canal filling removal. Materials and Methods After obturation, 40 mesial root canals of mandibular molars were distributed into four groups (n = 20) for filling material removal: PTU group–F2 instrument (25.08) of ProTaper Universal system; R25 group–R25 instrument (25.08) of Reciproc system; X2 group–X2 instrument (25.06) of ProTaper Next system and X3 group–X2 instrument (25.06) of ProTaper Next system, followed by X3 instrument (30.07). Cone-beam computed tomographic analysis was performed before and after filling material removal for acquisition of apical images. Apical transportation (AT) and its direction, and centering ability (CA), were assessed using the equations AT = (X1–X2)–(Y1–Y2) and CA = (X1–X2/Y1–Y2 or Y1–Y2/X1–X2), respectively. Data were submitted to the nonparametric Kruskal–Wallis and Dunn multiple comparison tests (p < 0.05) for statistical analysis. Results There was no statistically significant difference among groups for AT (p > 0.05), with a tendency toward transportation in the distal direction. Also, there was no statistically significant difference among groups regarding CA (p > 0.05). Conclusions The different systems, including ProTaper Next, caused AT within the acceptable clinical limit after filling removal. In addition, none of the tested systems presented adequate CA.

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