Root canal filling quality of mandibular molars with EndoSequence BC and AH Plus sealers: A micro‐ CT study

2019 ◽  
Vol 46 (1) ◽  
pp. 82-87 ◽  
Author(s):  
Rafael Nigri Roizenblit ◽  
Fabiola Ormiga Soares ◽  
Ricardo Tadeu Lopes ◽  
Bernardo Camargo Santos ◽  
Heloisa Gusman
Keyword(s):  
Root Canal ◽  
Micro Ct ◽  
Root Canal Filling ◽  
Mandibular Molars ◽  
Ah Plus

scholarly journals Micro-CT Evaluation of Root Filling Removal after Three Stages of Retreatment Procedure

2015 ◽  
Vol 26 (6) ◽  
pp. 612-618 ◽  
Author(s):  
Ricardo Abreu da Rosa ◽  
Manuela Favarin Santini ◽  
Bruno Cavalini Cavenago ◽  
Jefferson Ricardo Pereira ◽  
Marco Antônio Húngaro Duarte ◽  
...  
Keyword(s):  
Root Canal ◽  
Filling Material ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Root Canal Filling ◽  
Tomography System ◽  
Filling Materials ◽  
Ct Evaluation ◽  
Ah Plus ◽  
Post Hoc

The aim of this study was to quantify the residual filling material after filling removal, re-preparation with rotary or reciprocating files and passive ultrasonic irrigation (PUI). Twenty maxillary molars were prepared using ProTaper instruments up to F1. The teeth were filled with AH Plus and ProTaper gutta-percha points using the single-cone technique. Thereafter, the specimens were scanned using a micro-computed tomography system (Micro-CT #1). Then, the root canal filling was removed using ProTaper Retreatment files, and a new scan was performed (Micro-CT #2). The specimens were divided into two groups according to the instrument used for re-preparation: ProTaper rotary or WaveOne reciprocating files (Micro-CT #3). Finally, PUI was performed, and a new micro-CT scan was performed (Micro-CT #4). Intragroup and intergroup analyses were performed using Friedman and Dunn's post hoc test and the Kruskal-Wallis and Dunn post hoc tests, respectively. Palatal canal presented the highest volume of residual filling material in all stages of endodontic retreatment (p<0.05). The main reduction of filling volume was achieved after using ProTaper Retreament (p<0.05). The amount of remaining filling material after using ProTaper Retreatment was similar to that achieved with rotary and reciprocating files and after PUI (p>0.05). Rotary and reciprocating files achieved similar removal of the root canal filling (p>0.05). The greatest reduction in filling material was achieved after using ProTaper Retreatment files. Rotary and reciprocating instruments and PUI did not improve the removal of root canal filling materials.

scholarly journals Evaluation of Root Canal Filling with a Bioceramic Sealer Using Micro-Computed Tomography: A Pilot Study

2019 ◽  
Vol 890 ◽  
pp. 275-282
Author(s):  
Isabel Vasconcelos ◽  
Mário Rito Pereira ◽  
António Ginjeira ◽  
Margarida C. Franco ◽  
Pedro Morouço ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pilot Study ◽  
Root Canal ◽  
Future Research ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Root Canal Filling ◽  
Gutta Percha ◽  
Single Cone ◽  
Ah Plus

This pilot study aims to define a protocol for optimizing the micro-computed tomography (micro-CT) settings to evaluate in the future research the root canal filling in oval shaped canals. Thirty distal canals of mandibular molars were used. After preparation of the canals, the roots were randomly divided into five groups. The canals were filled with two types of sealers (Endosequence BC Sealer or AH Plus) and two types of gutta percha (Protaper Next cones and Endosequence BC cones), using thermal obturation in comparison with a single cone obturation technique. Each specimen was scanned three times using a micro-CT device at a resolution of 30,1 μm. The first scan was done for selecting the specimen according the inclusion criteria, the second one post-instrumentation and the last micro-CT scan after obturation the specimens. For the present study, the images were only evaluated with qualitative criteria and the settings for acquisition, reconstruction and analysis of micro-CT images were tested.

scholarly journals Evaluation of Threshold Values for Root Canal Filling Voids in Micro-CT and Nano-CT Images

Scanning ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Kaan Orhan ◽  
Reinhilde Jacobs ◽  
Berkan Celikten ◽  
Yan Huang ◽  
Karla de Faria Vasconcelos ◽  
...  
Keyword(s):  
Root Canal ◽  
Ct Images ◽  
Void Volume ◽  
Micro Ct ◽  
Root Canal Filling ◽  
Voxel Size ◽  
Significance Level ◽  
Root Canals ◽  
Ah Plus ◽  
Post Hoc

While several materials and techniques have been used to assess the quality of root canal fillings in micro-CT images, the lack of standardization in scanning protocols has produced conflicting results. Hence, the aim of this study was to determine a cutoff voxel size value for the assessment of root canal filling voids in micro-CT and nano-CT images. Twenty freshly extracted mandibular central incisors were used. Root canals were prepared with nickel titanium files to an ISO size 40/0.06 taper and then filled with a single cone (40/0.06 taper) and AH Plus sealer. The teeth were scanned with different voxel sizes with either micro-CT (5.2, 8.1, 11.2, and 16.73 μm) or nano-CT (1.5 and 5.0 μm) equipment. Images were reconstructed and analyzed with the NRecon and CTAn software. Void proportion and void volume were calculated for each tooth in the apical, middle, and coronal thirds of the root canal. Kruskal-Wallis and post hoc Mann–Whitney U tests were performed with a significance level of 5%. In micro-CT images, significantly different results were detected among the tested voxel sizes for void proportion and void volume, whereas no such differences were found in nano-CT images (p>0.05). Micro-CT images showed higher void numbers over the entire root length, with statistically significant differences between the voxel size of 16.73 μm and the other sizes (p<0.05). The values of the different nano-CT voxel sizes did not significantly differ from those of the micro-CT (5.2, 8.1, and 11.2 μm), except for the voxel size of 16.73 μm (p<0.05). All tested voxel sizes enabled the detection of root canal filling voids except for the voxel size of 16.73 μm. Bearing in mind the limitations of this study, it seems that a voxel size of 11.2 μm can be used as a reliable cutoff value for the assessment of root canal filling voids in micro-CT imaging.

scholarly journals Micro-CT analysis of dentinal microcracks on root canals filled with a bioceramic sealer and retreated with reciprocating instruments

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andressa Almeida ◽  
Kaline Romeiro ◽  
Marcely Cassimiro ◽  
Luciana Gominho ◽  
Eugênia Dantas ◽  
...  
Keyword(s):  
Root Canal ◽  
Material Removal ◽  
Filling Material ◽  
Micro Ct ◽  
Root Canal Filling ◽  
Root Canals ◽  
Type Iv ◽  
Ct Analysis ◽  
Ah Plus ◽  
Reciprocating Instruments

Abstract This study aimed to analyze the potential occurrence of dentinal defects after the removal of a root canal filling with two different sealers using Reciproc (RC) or Reciproc Blue (RB). The mesial roots of 60 mandibular molars with a Vertucci type IV configuration were selected. The samples were initially instrumented with Reciproc (R25) and then divided into the following four experimental groups according to the endodontic sealer and retreatment instrument (n = 15): BC Sealer/Reciproc (BCRC); BC Sealer/Reciproc Blue (BCRB); AH Plus/Reciproc (AHRC); and AH Plus/Reciproc Blue (AHRB). Then, the samples were scanned under micro-CT after obturation and removal of the filling material. Two analyses were conducted. First, an evaluation was performed on all the axial images, and another analysis evaluated each millimeter of the 10 mm from the apex. Dentinal defects were observed in all the samples. All of the identified defects in the images after filling material removal were present in the corresponding images after obturation. The use of AH Plus and EndoSequence BC Sealer, and filling material removal using RC and RB instruments did not induce dentinal defects.

scholarly journals Efficacy of digital radiographic systems in the quality assessment of intracanal materials used for primary teeth

2019 ◽  
Vol 18 ◽  
pp. e191649
Author(s):  
Guilherme Fantini Ferreira ◽  
Larissa Pereira Lagos de Melo ◽  
Mariana Rocha Nadaes ◽  
Fernanda Maria Mazoni Reis ◽  
Fernanda Miori Pascon ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Root Canal ◽  
Primary Teeth ◽  
Digital Systems ◽  
The Other ◽  
Micro Ct ◽  
Reference Standard ◽  
Root Canal Filling ◽  
Materials Used

Aim: To evaluate the performance of three digital radiographic systems in the analysis of root canal filling quality using different intracanal materials for primary teeth. Methods: Twenty-five bovine teeth were divided into 5 groups: Calen® combined with iodoform; Calen® combined with zinc oxide; zinc oxide and eugenol; UltraCal®XS, and 2% chlorhexidine combined with Ca(OH)2 + zinc oxide. Periapical radiographs were obtained with the VistaScan, Express, and SnapShot systems. The quality of the images was evaluated objectively (radiopacity) and subjectively (apical sealing and filling homogeneity). As the reference standard, the teeth were scanned with a micro-CT device. Results: Radiopacity differed among the radiographic systems and materials tested. In general, the greatest difference was observed between the Express and VistaScan systems; Calen® combined with iodoform resulted in the highest radiopacity. The radiographic systems did not differ in terms of homogeneity. However, Calen® combined with iodoform differed from the other materials and exhibited the best results. Regarding apical sealing, the SnapShot system and Calen® combined with zinc oxide provided the best results. Conclusion: Direct digital systems show better performance in evaluating the quality of endodontic treatment in primary teeth and should be preferred for this purpose.

scholarly journals Retreatment of mesial roots of mandibular molars filled with resin- based and bioceramic sealers

2021 ◽  
Vol 20 ◽  
pp. e210432
Author(s):  
Marina de Almeida Salim ◽  
Fabiola Ormiga ◽  
Ricardo Tadeu Lopes ◽  
Heloisa Gusman
Keyword(s):  
Computed Tomography ◽  
Root Canal ◽  
T Test ◽  
Filling Material ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Mandibular Molars ◽  
Ct Analysis ◽  
Ah Plus ◽  
Endodontic Retreatment

Aim: The aim of this study was to evaluate, by micro-computed tomography (micro-CT) analysis, the remaining filling material during endodontic retreatment performed with Protaper retreatment without solvent. Methods: Forty mandibular molars were divided into two groups (n = 20) according to the sealer used in the obturation: the bioceramic TotalFill BC (TF) or the resin-based AH Plus (AHP). The specimens were scanned before instrumentation, after obturation and after filling removal. Only the mesial roots were analysed. The filling volumes and the remaining filling material were calculated in the entire root canal and in the cervical, middle and apical thirds. Results: The volume of obturation and the volume of remaining filling material in the entire root canal and in the cervical, middle and apical thirds of the canal between the groups were not statistically different (independent t-test, p > 0.05). In the AHP group, there was a higher percentage of remaining filling material in the middle third than in the cervical third (p < 0.05). Conclusion: The filling material could not be entirely removed from any specimen.

scholarly journals Quality of Root Canal Filling Using a Bioceramic Sealer in Oval Canals: A Three-Dimensional Analysis

2021 ◽  
Author(s):  
Poliana J. Penha da Silva ◽  
Marília F. Marceliano-Alves ◽  
José C. Provenzano ◽  
Rafaela L. A. Dellazari ◽  
Lucio Souza Gonçalves ◽  
...  
Keyword(s):  
Root Canal ◽  
Three Dimensional ◽  
Nickel Titanium ◽  
Morphological Parameters ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Root Canal Filling ◽  
Significant Difference ◽  
Single Cone

Abstract Objectives The oval canals may be associated with inadequate debridement, which can affect the quality of the root canal filling, thus the treatment outcome. The aim of the present work was to compare the quality of oval canals fillings using EndoSequence BC sealer with the single-cone technique or cold lateral compaction. Materials and Methods Thirty-eight human single-rooted premolars with oval canals were instrumented to 1 mm from the apical foramen with hand nickel–titanium files, followed by circumferential filing with Hedstrom files. Teeth were paired into two groups based on their micro-computed tomography (CT) morphological parameters. Both groups were filled using EndoSequence BC sealer. The first used a single cone and the other with the cold lateral compaction technique. The voids volume was evaluated by micro-CT and the percentage was calculated for the total length and for the apical 5 mm of each canal. The Mann–Whitney U test was used to assess whether the surface area and obturation length differed significantly between the groups and to compare the percentage of voids for each technique. Results Both techniques resulted in less than 16% voids, with no statistically significant difference between them for the total canal length and for the apical 5 mm (p > 0.05). Conclusions The quality of the obturation performed with the single-cone technique was similar to that achieved with lateral compaction using EndoSequence BC sealer in oval canals.

scholarly journals Technical Quality of Root Canal Filling in Preclinical Training at Strasbourg University Using Two Teaching Protocols

2019 ◽  
Vol 13 (04) ◽  
pp. 521-526 ◽  
Author(s):  
Naji Kharouf ◽  
Joseph Hemmerlé ◽  
Youssef Haikel ◽  
Davide Mancino
Keyword(s):  
Root Canal ◽  
Technical Quality ◽  
Root Canal Filling ◽  
Root Canals ◽  
Mandibular Molars ◽  
Maxillary Molars ◽  
Chi Squared ◽  
Canal Systems ◽  
Preclinical Training

Abstract Objectives The aim of this study was to compare two teaching protocols according to the technical quality of root canal therapy (RCT) and the procedural errors occurred in preclinical training. Materials and Methods Two different groups of students were concerned. The first one (G1) performed a crown-down technique to shape the root canal systems and cold lateral condensation technique to fill them. The second one (G2) performed a step-down technique without initial manual scouting to shape the root canal systems, and cold hydraulic condensation technique, to fill them. G2 used clinical operative microscope to check the access cavity preparation. Statistical Analysis The quality of RCTs and procedural errors were recorded and analyzed using chi-squared test and t-test. Results Four hundred sixty-eight root canals from 152 maxillary molars were treated by the G1 students: 46.6% canals were judged as acceptable. Four hundred sixty-nine root canals from 152 mandibular molars were treated by G1: 58.8% canals were judged as acceptable. Five hundred fifteen root canals from 156 maxillary molars were treated by G2 students: 84.1% canals were judged as acceptable. Four hundred ninety-three root canals from 156 mandibular molars were treated by G2: 90.9% canals were judged as acceptable. Among the errors, the incidence of “ledges” and “fractured instruments” was statistically significant in G1 compared with G2, both on maxillary and on mandibular molars. Conclusions The molar RCTs performed by G2, who got benefit from the new teaching protocol, resulted in a better quality of root filling and in fewer procedural errors compared with the molar RCTs performed by G1.

scholarly journals Evaluation of the radiopacity of selected calcium-silicate root canal sealers

2019 ◽  
Vol 65 (4) ◽  
Author(s):  
Przemysław Reszka ◽  
Katarzyna Grocholewicz ◽  
Agnieszka Droździk ◽  
Mariusz Lipski
Keyword(s):  
Root Canal ◽  
Calcium Silicate ◽  
In Vitro Study ◽  
International Standards ◽  
Root Canal Filling ◽  
Filling Materials ◽  
Ah Plus ◽  
Root Canal Sealers

Introduction: International standards require adequate radiopacity of root canal filling materials to distinguish them from natural structures, such as tooth tissues, and to allow evaluation of the quality of the root canal filling.The aim of this in vitro study was to assess the radiopacity of selected calcium-silicate root canal sealers compared with the resin-based AH Plus root canal sealer.Materials and methods: The study included 6 root canal sealers: BioRoot RCS, GuttaFlow bioseal, MTA Fillapex, Total Fill BC Sealer, Well-Root ST and AH Plus. Six disc-shaped samples were prepared from all analysed materials (4 mm in diameter and 1 mm thick) and analysed using a digital radiography technique and aluminium step wedges (1.5–15 mm thick) as a standard reference. The radiopacity was determined using computer image analysis. The data was statistically analysed using a Tukey’s range test.Results: All root canal sealers showed radiopacity at least corresponding to the 3 mm aluminium step wedge. AH Plus (13.23 mm Al) showed the highest radiopacity, followed by Total Fill BC Sealer (7.93 mm Al), Well-Root ST (7.12 mm Al), BioRoot RCS (5.93 mm Al) and GuttaFlow bioseal (5.08 mm Al ). MTA Fillapex (3.02 mm Al) showed the lowest radiopacity.Conclusions: Although the evaluated root canal sealers show different radiopacities, all the materials met the criteria laid down by the International Organization of Standardization.

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