scholarly journals Relationship between the Apical Preparation Diameter and the Apical Seal: An In Vitro Study

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Kaoutar Laslami ◽  
Sara Dhoum ◽  
Amine El Harchi ◽  
Iman Benkiran
Keyword(s):  
Computer Software ◽  
In Vitro Study ◽  
Negative Control ◽  
Original Position ◽  
Universal System ◽  
Root Canals ◽  
Dye Penetration ◽  
Working Length ◽  
Group 2

Objectives. The aim of the study is to define the relationship between the apical preparation diameter and the apical sealing ability to highlight the importance of the preservation of the diameter and the original position of the apical foramen. Materials and Methods. 50 extracted maxillary incisors were randomly allocated into three groups of 15 teeth each (n = 15) according to the apical preparation size: Group 1: finishing file F1 corresponding to size 20 reached the working length (ProTaper Universal system Dentsply®); Group 2: prepared up to size 30 corresponding to finishing file F30; Group 3: prepared up to size 50 corresponding to finishing file F5. Five teeth were assigned to positive and negative control groups. After the filling of the root canals, the teeth were isolated and immersed in a dye solution, then cut longitudinally, photographed, and the dye penetration were calculated using a computer software. Results. Comparison of the three different apical preparation sizes showed no statistically significant differences regarding the apical microleakage. Conclusion. The most important value of the dye penetration was observed in the group with the largest apical diameter.

scholarly journals Cleaning Efficiency of Anatomic Endodontic Technology, ProFile System and Manual Instrumentation in Ovalshaped Root Canals: An in vitro Study

2013 ◽  
Vol 14 (4) ◽  
pp. 629-634 ◽  
Author(s):  
E Sujayeendranath Reddy ◽  
Dinapadu Sainath ◽  
M Narenderreddy ◽  
Srikanth Pasari ◽  
Sangeetha Vallikanthan ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Smear Layer ◽  
Cleaning Efficiency ◽  
Root Canals ◽  
Multiple Comparison Test ◽  
Working Length ◽  
Group 3 ◽  
Group 2 ◽  
Technology Group

ABSTRACT Aim This in vitro study is an attempt to compare the effectiveness in cleaning oval shaped root canals usingAnatomic Endodontic Technology (AET®), ProFile system® and Manual Instrumentation with K-files Methodology Sixty oval shaped single rooted maxillary and mandibular premolars with straight canals were divided in to three groups. The root canals were, confirmed as being oval shape by means of radiographs made in a buccolingual and mesiodistal direction. Automated canal preparation was performed using Anatomic Endodontic Technology (group 1) and the ProFile system® (group 2). Manual instrumentation (group 3) was performed with k-files. Irrigation was performed using alternatively 3% NaOCl and 17% EDTA, followed by rinsing with normal saline. The roots were split longitudinally into two halves and examined under a scanning electron microscope. The presence of debris and smear layer was recorded at distances 1, 5 and 10 mm from the working length using a three step scoring scale. Mean scores for debris and smear layer was calculated and statistically analyzed for between and within groups significance, using the Kruskal-Wallis nonparametric ANOVA test and Bonferroni's multiple comparison test. Results At 1, 5 and 10 mm levels the root canals prepared with AET had significantly less surface debris and smear layer on the canal walls as compared to canals prepared with ProFile system® or manual instrumentation. For all three groups significantly lower mean smear layer scores (p < 0.05) were recorded at 5 and 10 mm levels compared with the 1 mm level. Significantly lower mean debris scores (p < 0.05) were also recorded at 5 and 10 mm levels for the AET group whereas no significant differences were found between the three levels for the ProFile system® and manual instrumentation groups. Conclusion Although better instrumentation scores were obtained in canals prepared with AET, complete cleanliness was not achieved with any of the techniques and instruments investigated. How to cite this article Reddy ES, Sainath D, Narenderreddy M, Pasari S, Vallikanthan S, Sindhurareddy G. Cleaning Efficiency of Anatomic Endodontic Technology, ProFile System and Manual Instrumentation in Oval-shaped Root Canals: An in vitro Study. J Contemp Dent Pract 2013;14(4):629-634.

scholarly journals Effectiveness of a silicon-based root canal sealer for filling of simulated lateral canals

2007 ◽  
Vol 18 (1) ◽  
pp. 20-23 ◽  
Author(s):  
João Vicente Baroni Barbizam ◽  
Matheus Souza ◽  
Doglas Cecchin ◽  
Jakob Dabbel
Keyword(s):  
Root Canal ◽  
In Vitro Study ◽  
Root Canal Sealer ◽  
Human Teeth ◽  
Significance Level ◽  
Working Length ◽  
Group 3 ◽  
Group 2 ◽  
Silicon Based

The purpose of this in vitro study was to evaluate the ability of a silicon-based root canal sealer, compared to zinc oxide and eugenol and an epoxy resin-based sealers, for filling of simulated lateral canals. Thirty extracted single-rooted human teeth were selected, conventional access was made and the working length was established 1 mm from the apical foramen. Three simulated lateral canals, one in each root third (coronal, middle and apical) were prepared in both the mesial and distal surfaces of each tooth using a size 15 reamer adapted to a low-speed handpiece. Each root canal was instrumented using ProTaper rotary files up to file F3 at the working length, and then irrigated with 2.5% NaOCl followed by EDTA. The teeth were assigned to 3 groups (n=10), according to the root canal sealer: Roeko Seal (Group 1), Sealer 26 (group 2) and Grossman's sealer (Group 3). Gutta-percha cold lateral condensation technique was performed in all groups. Postoperative radiographs were taken and the images were projected for evaluation of the quality of lateral canal filling. Data were submitted to statistical analysis by Kruskal Wallis test at 5% significance level. The results showed that Grossman's sealer filled a larger number of lateral canals than Roeko Seal (p<0.05) and Sealer 26 (p<0.01). It may be concluded that Roeko Seal silicone-based root canal sealer was not as effective as the Grossman's sealer for filling of simulated lateral canals. The lateral canals localized in the apical third of the root were more difficult to be filled.

scholarly journals Comparative Evaluation of Cleaning Efficacy of Three Different Single File Systems: An In Vitro Study

2021 ◽  
pp. 26-31
Author(s):  
Deebah Choudhary
Keyword(s):  
File Systems ◽  
In Vitro Study ◽  
Single File ◽  
Working Length ◽  
Group 3 ◽  
Group 2 ◽  
Cleaning Efficacy ◽  
Scanning Electron ◽  
Group 1

Aim: The aim of this study was to evaluate the canal cleaning efficacy of these three file systems using scanning electron microscopy. Place and Duration of Study: The study was conducted in the Department of Conservative dentistry and Endodontics, Institute of Dental Sciences Sehora, between October 2020 and December 2020. Materials and Methods: Access cavity preparation was performed on sixty extracted human mandibular premolar teeth and working length was determined. The samples were randomly divided into three groups (n=20) depending upon the file system used i.e. Group 1 (Reciproc Blue), Group 2 (Waveone Gold) and Group 3 (F360). Samples were split into two halves by creating longitudinal grooves on the buccal and lingual surfaces. The samples were sputter-coated with gold and examined under scanning electron microscope at 5000X. The dentinal wall of root canal at coronal, middle and apical thirds of each sample were evaluated for the presence of determining the canal cleanliness and then analyzed using a five-score index. Results: The results of this study revealed that Group 1 (Reciproc Blue) exhibited better cleaning efficacy than samples of Group 2 (WaveOne Gold) and Group 3 (F360) at different locations in the canal i.e. coronal, middle and apical. The mean debris present was highest in coronal area for both group 2 and group 3 i.e. 2.1 and least was seen in apical area of group 1 i.e. 0.3. (p<0.05) Conclusion: Reciproc Blue single-file showed highest cleaning efficacy followed by Waveone Gold and F360. Reciproc file also showed effective cleaning in the apical third of the canal.

scholarly journals Evaluation of Apical Sealing Ability of Four Different Sealers using Centrifuging Dye Penetration Method: An in vitro Study

2012 ◽  
Vol 13 (6) ◽  
pp. 830-833
Author(s):  
Romel Joseph
Keyword(s):  
In Vitro Study ◽  
Blue Dye ◽  
Control Groups ◽  
Root Canals ◽  
Dye Penetration ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Ah Plus ◽  
And Control

ABSTRACT Aim The aim of this in vitro study was to evaluate the apical seal obtained with four root canal sealers AH 26, Sealapex, Endoflas FS and AH Plus, with lateral condensation. Materials and methods Sixty root canals were prepared using the step-back technique. The specimens were divided into four experimental groups of 12 teeth and two control groups of 12 teeth. The experimental groups were obturated by laterally condensed gutta-percha with one of the tested sealers and control groups were obturated without any sealer. Methylene blue dye penetration with centrifuging method was used to evaluate the apical sealing ability. The quantitative apical leakage of each specimen was measured after 2 weeks. Results The results showed no significant differences between all groups except between AH Plus and Endoflas FS (<0.05). AH Plus showed significantly less leakage than Endoflas FS. Conclusion AH Plus showed the least leakage compared to AH 26, Sealapex and Endoflas FS. How to cite this article Joseph R, Singh S. Evaluation of Apical Sealing Ability of Four Different Sealers using Centrifuging Dye Penetration Method: An in vitro Study. J Contemp Dent Pract 2012;13(6):830-833.

scholarly journals Microleakage of Packable Composites Used in Post Spaces Condensed Using Different Methods

2002 ◽  
Vol 3 (2) ◽  
pp. 23-30 ◽  
Author(s):  
Güliz Görgül ◽  
A. Cemal Tinaz ◽  
Tayfun Alaçam ◽  
Bağdagül H. Kivanç ◽  
Özgür Uzun
Keyword(s):  
Composite Resin ◽  
In Vitro Study ◽  
Root Canals ◽  
Dye Penetration ◽  
Anterior Teeth ◽  
Mechanical Hand ◽  
Dentin Bonding Agent ◽  
Etched Surface ◽  
Clinical Problems

Abstract The aim of this in vitro study was to evaluate the apical and coronal microleakage of a packable composite material compacted by either hand or ultrasonic condensers when placed in post spaces. Fortytwo extracted anterior teeth were used. After conventional obturation of the root canals, parallel post spaces 5 mm in depth and 2 mm in diameter were prepared using Gates Glidden and diamond burs. A primer and a dentin bonding agent (Prime & Bond NT) was applied to the etched surface for 30 seconds and light polymerized for 40 seconds. Surefil packable composite resin was inserted in four equal increments and each polymerized for 40 seconds. Half of the specimens were compacted with an ultrasonic tip and the other half with a mechanical hand compactor. After immersion in the dye, the teeth were sectioned longitudinally and dye penetration was evaluated using a stereomicroscope and microleakage recorded in mm. A One-Way Analysis of Variance indicated the two condensing methods were not statistically different (p>0.05). When microleakage was compared within groups, there was also no statistical difference between coronal or apical microleakage (p>0.05). In an in vitro environment, ultrasonic condensers do not offer any advantage over hand condensers. Both the coronal and apical portions of the root had microleakage indicating that regardless of the condensation method and the use of a packable composite, there is still microleakage that could potentially create further clinical problems. Citation Görgül G, Alaçam T, Kivanç BH, et. al. Microleakage of Packable Composites Used in Post Spaces Condensed Using Different Methods. J Contemp Dent Pract 2002 May;(3)2: 023-030.

scholarly journals Adhesion of Two New Glass Fiber Post Systems Cemented with Self-Adhesive Resin Cements

2019 ◽  
Vol 7 (3) ◽  
pp. 80 ◽  
Author(s):  
Esin Özlek ◽  
Prasanna Neelakantan ◽  
Jukka Pekka Matinlinna ◽  
Sema Belli ◽  
Mehmet Ugur ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesion Strength ◽  
In Vitro Study ◽  
Study Groups ◽  
Fiber Post ◽  
Resin Cements ◽  
Adhesive Resin ◽  
Root Canals ◽  
Group 2

The aim of this in vitro study was to evaluate the adhesion strength of two new fiber post systems (FiberSite™ Post and Cytec™ Blanco Post) cemented with two different adhesive resin cements (Panavia™ SA and Maxcem™ Elite). Root canals of sixty extracted human mandibular premolars were prepared using ProTaper Universal™ rotary files (Dentsply Sirona Endodontics, York, PA, USA). The root canals were irrigated with 5.25% sodium hypochlorite (NaOCl) during instrumentation. After root canal preparation, the canals were irrigated with 2 mL of 17% EDTA (1 min), followed by 2 mL of 5.25% (5 min) NaOCI, and 2 mL saline. The root canals were dried with paper points and divided randomly into two study groups (n = 30) according to the type of post system: Group 1, FiberSite™ Post (MegaDental, Partanna, Italy); and group 2, Cytec™ Blanco Post (Hahnenkratt, Königsbach-Stein, Germany), with one of the two adhesive resin cements: Subgroup A, Panavia™ SA Cement Plus Automix (Kuraray, Osaka, Japan); subgroup B, Maxcem™ Elite (Kerr, Orange, CA, USA). Following thermocycling, the adhesion strength was evaluated using the push-out adhesion (bond) strength test. Fractographic analysis was performed using stereomicroscope. The data were analyzed using two-way analysis of variance (p = 0.05). The adhesion strength values of both the posts were significantly higher when cemented with subgroup B (Maxcem™ Elite). The highest adhesion strength value was demonstrated by group 1B (FiberSite™ post cemented with Maxcem™ Elite cement). The type of post did not have a significant impact on the bond strength values for either cement material.

scholarly journals [NO TITLE AVAILABLE]

2007 ◽  
Vol 18 (4) ◽  
pp. 289-293 ◽  
Author(s):  
Orlando Limongi ◽  
Diana Santana de Albuquerque ◽  
Flares Baratto Filho ◽  
José Roberto Vanni ◽  
Elias P. Motcy de Oliveira ◽  
...  
Keyword(s):  
Root Canal ◽  
Multislice Ct ◽  
In Vitro Study ◽  
Ct Scanner ◽  
Root Canals ◽  
Group I ◽  
Working Length ◽  
Root Dentin ◽  
Dentin Thickness

This in vitro study compared, using computed tomography (CT), the amount of dentin removed from root canal walls by manual and mechanical rotary instrumentation techniques. Forty mandibular incisors with dental crown and a single canal were selected. The teeth were randomly assigned to two groups, according to the technique used for root canal preparation: Group I - manual instrumentation with stainless steel files; Group II - mechanical instrumentation with RaCe rotary nickel-titanium instruments. In each tooth, root dentin thickness of the buccal, lingual, mesial and distal surfaces in the apical, middle and cervical thirds of the canal was measured (in mm) using a multislice CT scanner (Siemens Emotion, Duo). Data were stored in the SPSS v. 11.5 and SigmaPlot 2001 v. 7.101 softwares. After crown opening, working length was determined, root canals were instrumented and new CT scans were taken for assessment of root dentin thickness. Pre- and post-instrumentation data were compared and analyzed statistically by ANOVA and Tukey's post-hoc test for significant differences (p=0.05). Based on the findings of this study, it may be concluded that regarding dentin removal from root canal walls during instrumentation, neither of the techniques can be considered more effective than the other.

scholarly journals Evaluation of the apical microleakage of MTA Fillapex, AH26, and Endofill sealers

2020 ◽  
Vol 23 (3) ◽  
Author(s):  
Saeedeh Galledar ◽  
Robab Farhang ◽  
Malek Abazari ◽  
Parisa Negahdar
Keyword(s):  
Root Canal ◽  
Test Group ◽  
In Vitro Study ◽  
Negative Control ◽  
Vitro Study ◽  
Control Group ◽  
Dye Penetration ◽  
Gutta Percha ◽  
Significant Difference

Objective: Proper apical seal plays an important role in the success of root canal treatment. The most common cause of failure of root canal therapy is known as the lack of adequate apical seal. The aim of this in vitro study was to compare the apical microleakage of MTA Fillapex, , and Endofill sealers using dye penetration method. Material and Methods: In this in vitro study, 72 single-rooted extracted human teeth were selected. The teeth were randomly divided into three experimental groups of 20 and two positive and negative control groups of 6. The canals were prepared by step-back technique and then filled with gutta-percha and one of the sealers mentioned. In the positive control group, the canals were filled with gutta-percha without sealer, and in the negative control group, the canals were prepared but not filled. The teeth were immersed in 2% methylene blue dye for 72 hours. The teeth were then cut longitudinally and the level of dye penetration was measured under a stereomicroscope. Data were analyzed by SPSS ver. 19 software, ANOVA and Bonferroni post-hoc tests. Results: The mean level of dye penetration in the Endofill test group was significantly higher than that in the  and MTA Fillapex test groups. While, the observed difference between  and MTA Fillapex groups was not statistically significant (p<0.05). Conclusion: The results of this study showed that  and MTA Fillapex sealers did not show any significant difference in apical seal properties. However, their sealing strength was significantly greater than Endofill sealer.KeywordsAH26 sealer; Endofill; MTA Fillapex; Microleakag

scholarly journals Effect of diode laser irradiation on the apical sealing of MTA retrofillings

2006 ◽  
Vol 20 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Eliana Barbosa de Souza ◽  
Crystiane Venditti Gomes de Amorim ◽  
José Luiz Lage Marques
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
In Vitro Study ◽  
Apical Surface ◽  
Human Teeth ◽  
Root Canals ◽  
Gutta Percha ◽  
Group 2 ◽  
Student’S T

Apical sealing is essential for the success of paraendodontic surgery, so any procedure that may favor an adequate sealing of the apical remainder should be performed. The purpose of this study was to evaluate the influence of diode laser irradiation on the apical sealing of root-end cavities with MTA retrofillings. Root canals in twenty extracted human teeth were shaped with K-files and filled with gutta-percha. The apexes were cut off and root-end preparations were performed. The roots were divided randomly in 2 groups. Group 1 (ten specimens) was retrofilled with MTA. Group 2 was irradiated with diode laser, with 1 W for 20 seconds, on the apical surface and root end cavity before retrofilling with MTA. The specimens had their external surfaces impermeabilized with cyanoacrylate, except for the apical surface, and were then immersed in 1% rhodamine B dye for 72 h and placed in plaster stone. After that, the specimens were submitted to longitudinal abrasion until half of the root remained. The linear dye leakage was observed in these mid-roots between the root canal wall and retrofilling. The linear dye leakage was measured with Image Lab software, and the results were statistically analyzed with Student's t test. There were no statistically significant differences between the two groups (p > 0.05). The diode laser irradiation did not improve the apical sealing of MTA retrofillings under the conditions of this in vitro study.

scholarly journals Cleaning the apical third of curved canals after different irrigation protocols

2012 ◽  
Vol 23 (4) ◽  
pp. 351-356 ◽  
Author(s):  
Érika Sales Joviano Pereira ◽  
Isabella Faria da Cunha Peixoto ◽  
Rodrigo Keigo Lopes Nakagawa ◽  
Vicente Tadeu Lopes Buono ◽  
Maria Guiomar de Azevedo Bahia
Keyword(s):  
Electron Microscopy ◽  
Universal System ◽  
Root Canals ◽  
Length Group ◽  
Working Length ◽  
Debris Removal ◽  
Canal Systems ◽  
Group 2 ◽  
Scanning Electron ◽  
Group 1

This study evaluated the protocols of sonic and vacuum irrigation regarding the capacity of debris removal from root canal systems. Canal preparations were carried out on 30 mandibular first molars using the ProTaper Universal System. Teeth were divided into two experimental groups (n=15): Group 1: sonic irrigation and Group 2: vacuum irrigation protocol. Subsequently, the mesial roots were sectioned and observed by stereomicroscopy and scanning electron microscopy. Three independent examiners evaluated images of the apical thirds according to the following scores: 1= small presence of debris, 2= moderate presence of debris, and 3= dense presence of debris. Data were analyzed with ANOVA and Kruskal-Wallis tests (α=0.05). Comparison among the groups revealed that at the apical third, the root halves of Group 1 had significantly less surface debris (p=0.002) than those of Group 2. However, at 2 mm from the working length, Group 2's specimens showed less remaining debris in approximately 75% of the analyzed root canals. At the whole apical third, the sonic irrigation protocol removed significantly more debris than the vacuum protocol. However, in the region at 2 mm from the working length, the second irrigation method demonstrated a better performance.

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