Efficacy of Removing Thermafil and GuttaCore from Straight Root Canal Systems Using a Novel Non-Surgical Root Canal Re-Treatment System: A Micro-Computed Tomography Analysis

The present study aims to evaluate the effectiveness of an XP-endo non-surgical root canal re-treatment system in removing both GuttaCore and Thermafil gutta-percha carrier-based root canal filling materials from straight root canal systems using micro-computed tomography (micro-CT) analysis. The study was performed on 20 single-rooted upper teeth, which were randomly allocated into the following study groups: Group A, Thermafil and AH Plus sealer (n = 10); Group B, GuttaCore and AH Plus sealer (n = 10). Before and after the non-surgical root canal re-treatment procedure, the samples were submitted for a micro-CT analysis. The volume of the root canal filling material (mm3), the volume of the remaining root canal filling material (mm3) and the time (minutes) needed to remove the root canal filling material were also recorded. Student’s t-test was used to analyze the results. No statistically significant differences were found between the volume of the remaining root canal filling material in the GuttaCore and Thermafil root canal filling systems at the coronal third (p = 0.782), middle third (p = 0.838) or apical third (p = 0.882) of the straight root canal systems; however, the GuttaCore required a statistically significant (p = 0.037) shorter amount of time (4.72 ± 0.76 min) to be removed than the Thermafil carrier-based root canal filling material (5.92 ± 1.42 min). The XP-endo Finisher non-surgical endodontic re-treatment system removes both GuttaCore and Thermafil gutta-percha carrier-based root canal filling materials from straight root canal systems, although removal of the GuttaCore gutta-percha carrier-based root canal filling material required less time.

Download Full-text

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

Brazilian Dental Journal ◽

10.1590/0103-6440201300061 ◽

2015 ◽

Vol 26 (6) ◽

pp. 612-618 ◽

Cited By ~ 11

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.

Download Full-text

Sealing Ability of AH Plus and GuttaFlow Bioseal

Bioinorganic Chemistry and Applications ◽

10.1155/2020/8892561 ◽

2020 ◽

Vol 2020 ◽

pp. 1-8

Author(s):

Soo-Hyuk Lee ◽

Soram Oh ◽

Adel Saeed Al-Ghamdi ◽

Ayman Omar Mandorah ◽

Kee-Yeon Kum ◽

...

Keyword(s):

Fluid Flow ◽

Root Canal ◽

Glass Ceramics ◽

Filling Material ◽

Root Canal Filling ◽

Measuring Device ◽

Gutta Percha ◽

Sealing Ability ◽

Ah Plus ◽

The Mean

The objective of root canal obturation is to achieve a fluid-tight seal. Recently, GuttaFlow bioseal (GB), a root canal sealer composed of polydimethylsiloxane, gutta-percha particles, and bioactive glass ceramics, has been developed, to enhance the sealing ability of root canal filling material. The objective of this study was to assess the sealing ability of GB using a subnanoliter-scaled fluid-flow measuring device and to compare with that of AH Plus (AH). The fluid flow in root canal-filled teeth using either gutta-percha cone (GP) with AH (GAR; n = 10) or GP with GB (GBR; n = 10) and in GP inserted in AH blocks (GA; n = 10) or GP inserted in GB blocks (GB; n = 10) was measured. In addition, fluid flow in sealer blocks of AH (A; n = 10) and GB (B; n = 10), which served as negative controls, was measured. Root canal-filled teeth using GP without any sealer (GR) acted as positive controls (n = 10). The leakage was obtained by calculating the volume of moved water by time (s), after stabilization of the fluid flow was achieved. Statistical analysis was performed using the Kruskal–Wallis test and Mann–Whitney U-test with Bonferroni correction. A p value less than 0.00238 (0.05/21) was considered significantly different. The mean leakages (nL/s) in the groups are as follows: GAR, 0.0958 ± 0.0543; GBR, 0.0223 ± 0.0246; GA, 0.0644 ± 0.0803; GB, 0.0267 ± 0.0182; A, 0.0055 ± 0.0057; B, 0.0052 ± 0.005; and GR, 0.2892 ± 0.3018. The mean leakage in the GBR group was lower than that in the GAR group (p = 0.001), while the mean leakages in the GA and GB groups were not significantly different. GuttaFlow bioseal can be useful in single-cone obturation technique.

Download Full-text

Radiographic and scanning electron microscopic assessment of root canal filling remnants after endodontic re-instrumentation

Brazilian Dental Science ◽

10.14295/bds.2017.v20i1.1325 ◽

2017 ◽

Vol 20 (1) ◽

pp. 80 ◽

Cited By ~ 1

Author(s):

Luciane Geanini Pena Santos ◽

Wilson Tadeu Felippe ◽

Beatriz Dulcineia Mendes Souza ◽

Andrea Cristina Konrath ◽

Mabel Mariela Rodríguez Cordeiro ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Root Canal ◽

Filling Material ◽

Root Canal Filling ◽

Root Canals ◽

Filling Materials ◽

Ah Plus ◽

Endodontic Retreatment ◽

Scanning Electron

Objective: Failures in endodontic treatment may occur by several reasons. Endodontic retreatment is an interesting alternative to manage this clinical problem. However, it is not possible to completely remove the root canal filling by any current retreatment technique. The aim of this study was to evaluate the presence of residual root canal filling materials after endodontic re-instrumentation. Material and Methods: Sixty extracted anterior human teeth were prepared by step-back technique with Flexofiles, K-files and Gates-Glidden (GG) burs. Between the use of each file or bur, root canals were irrigated with sodium hypochlorite (NaOCl). Smear layer was removed by irrigation with ethylenediaminetetraacetic acid and NaOCl. After drying with paper points the root canals were randomly divided into 5 groups (n = 12), according to filling material: Resilon cones/Real Seal sealer or gutta-percha cones and Endofill, Sealapex, AH Plus or MTA Fillapex sealers. After one week, root canal fillings were removed using Eucaliptol and K-files. Root canals were re-instrumented with K-files and GG burs sized larger than the first ones. The removal of root canal filling material was analyzed by radiography and scanning electron microscopy (SEM). Statistical analysis was performed using Binary Logistic Regression test (P < 0.05). Results: Radiographic and SEM analysis showed that material from the MTA Fillapex group was better removed than that from Endofill, Sealapex, AH Plus and Real Seal groups. Conclusion: After re-instrumentation, MTA Fillapex group showed less remnants into the root canals than Endofill, Sealapex, AH Plus and Real Seal groups. Residual material was most often found in the apical third.Keywords Dental radiography; Endodontic retreatment; Root canal filling materials; Scanning electron microscopy.

Download Full-text

Comparison of Root Filling Quality of Two Types of Single Cone-Based Canal Filling Methods in Complex Root Canal Anatomies: The Ultrasonic Vibration and Thermo-Hydrodynamic Obturation versus Single-Cone Technique

Materials ◽

10.3390/ma14206036 ◽

2021 ◽

Vol 14 (20) ◽

pp. 6036

Author(s):

Yong-Sik Cho ◽

Youngjun Kwak ◽

Su-Jung Shin

Keyword(s):

Ultrasonic Vibration ◽

Root Canal ◽

Filling Material ◽

Complex Root ◽

Micro Computed Tomography ◽

Root Canal Filling ◽

Single Cone ◽

Canal Systems ◽

Filling Method

This study aimed to assess the effectiveness of ultrasonic vibration and thermo-hydrodynamic obturation (VibraTHO) using two types of root canal sealers, in comparison to the single-cone (SC) technique and a calcium silicate-based root canal sealer in complex root canal anatomies. Thirty single-rooted human maxillary premolars with two canals that had a complex root canal anatomy of transverse anastomoses or ramifications were prepared and assigned to the following three experimental groups, according to the filling method: SE group, SC technique with Endoseal TCS; VE group, VibraTHO with Endoseal TCS; and VG group, VibraTHO with GuttaFlow 2. Each tooth was scanned using micro-computed tomography, and the volume percentages of the filling material were calculated. The analysis of variance was used to analyze the statistical differences between the three groups (p < 0.05). The mean volume of the filling material was higher in the VG and VE groups than that in the SE group (p < 0.05) along the apical to middle-to-coronal thirds, and significant differences were observed between each root canal area (p < 0.05), with the only exception being at the apical thirds between the VE and SE groups. The VibraTHO technique using GuttaFlow 2 can be a more effective root canal filling method for anatomically complex root canal systems than the SC technique with Endoseal TCS. On the other hand, the VibraTHO technique using Endoseal TCS has a limited effect on improving the quality of the root filling at the apical portion of anatomically complex root canal systems, compared to the SC technique with Endoseal TCS.

Download Full-text

Apical extrusion of root canal filling material during the removal of gutta-percha and resilon

Stomatoloski glasnik Srbije ◽

10.2298/sgs2002091v ◽

2020 ◽

Vol 67 (2) ◽

pp. 91-99

Author(s):

Karolina Vukoje ◽

Ivana Stojsin ◽

Ivana Kantardzic ◽

Ognjenka Jankovic

Keyword(s):

Root Canal ◽

Chronic Infection ◽

Filling Material ◽

Experimental Conditions ◽

Root Canal Filling ◽

Filling Materials ◽

Gutta Percha ◽

Rotary Instruments ◽

Apical Extrusion ◽

Level Of Significance

Introduction. Root canal filling material may be extruded during retreatment through the apical foramen and cause flare-up or chronic infection. The aim of this study was to compare the apical extrusion of gutta-percha and resilon filling materials during retreatment using hand and rotary instruments. Methods. Sixty extracted single-rooted teeth with single, straight canal were selected. Canals were prepared with ProTaper Universal rotary system to a size F2. Two groups (30 teeth in each) were filled with gutta-percha or resilon points, respectively. In both groups teeth were randomly divided into the three subgroups (10 teeth in each), based on the instruments used for retreatment: Hedstrom hand files and two rotary groups- ProTaper and Twisted File instruments. Apical extrusion was detected visually, using a 4-degree scoring system. Mean scores were calculated and analyzed statistically (t-test and ANOVA). The level of significance was set at p < 0.05. Results. Under tested experimental conditions, the type of canal filling material did not have significant effect on the results of apical extrusion during retreatment. Significantly more material was extruded in the resilon group when manual, Hedstrom file was used (1.80 ? 1.13) than rotary ProTaper (0.60 ? 0.70) and Twisted File (0.50 ? 0.71). Conclusions. The use of a rotary technique is recomended to minimize apical extrusion, especially when resilon obturation material is removed during retreatment.

Download Full-text

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.890.275 ◽

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.

Download Full-text

The Efficacy of Rotary, Reciprocating, and Combined Non-Surgical Endodontic Retreatment Techniques in Removing a Carrier-Based Root Canal Filling Material from Straight Root Canal Systems: A Micro-Computed Tomography Analysis

Journal of Clinical Medicine ◽

10.3390/jcm9061989 ◽

2020 ◽

Vol 9 (6) ◽

pp. 1989 ◽

Cited By ~ 1

Author(s):

Tarek-Fahed Alakabani ◽

Vicente Faus-Llácer ◽

Ignacio Faus-Matoses ◽

Celia Ruiz-Sánchez ◽

Álvaro Zubizarreta-Macho ◽

...

Keyword(s):

Computed Tomography ◽

Root Canal ◽

Material Removal ◽

Filling Material ◽

Micro Computed Tomography ◽

Root Canal Filling ◽

Root Canal Retreatment ◽

Before And After ◽

Canal Systems ◽

Endodontic Retreatment

The aim of this study is to analyze and compare the efficacy of three non-surgical endodontic retreatment techniques in removing a carrier-based root canal filling material from straight root canal systems. The study was performed on 99 single-rooted extracted teeth using the ProTaper Gold endodontic rotary system up to the F2 file (Dentsply Maillefer, Baillagues, Switzerland), which were sealed with GuttaCore (Dentsply Maillefer, Ballaigues, Switzerland) and AH plus epoxy resin sealer (Dentsply DeTrey, Konstanz, Germany) and randomly assigned to the following non-surgical retreatment techniques: ProTaper Retreatment endodontic rotary instruments (D1–D3 files, Dentsply Maillefer, Ballaigues, Switzerland; n = 33, PTR), Reciproc Blue endodontic reciprocating instrument (R50, VDW, Munich, Germany; n = 33, RCB50), and a combined root canal retreatment technique between Gates-Glidden drills (sizes #3 and #2, Dentsply Maillefer, Ballaigues, Switzerland) and Hedstrom files (file size 35, 30, and 25, Dentsply Maillefer, Ballaigues, Switzerland; n = 33; H-GG). All of the teeth were submitted twice to a micro-computed tomography (micro-CT) scan, before and after non-surgical endodontic retreatment procedures. The volume of root canal filling material (mm3), volume of remaining root canal filling material (mm3), non-surgical endodontic retreatment working time (min), proportion of remaining root canal filling material (%), and efficacy of root canal filling material removal between the non-surgical endodontic retreatment techniques were analyzed using ANOVA one-way statistical analysis. Statistically significant differences were observed between the proportions of remaining root canal filling material of PTR and H-GG (p = 0.018), between the non-surgical endodontic retreatment working times (min; p < 0.001), and between the efficacies of root canal filling material removal by the non-surgical endodontic retreatment techniques (p = 0.009). However, the non-surgical endodontic retreatment systems allow for similar carrier-based root canal filling material removal.

Download Full-text

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

Scientific Reports ◽

10.1038/s41598-020-71989-6 ◽

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.

Download Full-text

Efficacy of Reciprocating Instruments in the Removal of Bioceramic and Epoxy Resin-Based Sealers: Micro-CT Analysis

Materials ◽

10.3390/ma14216670 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6670

Author(s):

Marko Rajda ◽

Ivana Miletić ◽

Gorana Baršić ◽

Silvana Jukić Krmek ◽

Damir Šnjarić ◽

...

Keyword(s):

Epoxy Resin ◽

Root Canal ◽

Filling Material ◽

Micro Ct ◽

Root Canal Filling ◽

Human Teeth ◽

Root Canals ◽

Gutta Percha ◽

Ct Analysis ◽

Reciprocating Instruments

The objective of this study was to evaluate the efficacy of reciprocating instruments in the removal of bioceramic and epoxy resin-based sealers using micro-CT analysis. Root canals of 40 extracted human teeth were instrumented with a size R25 Reciproc instrument. Specimens were randomly divided into two groups (n = 20) according to the root canal filling material. In the first group, root canals were obturated with AH Plus sealer and Reciproc R25 gutta-percha. In the second group, a combination of bioceramic gutta-percha (TotalFill BC) and bioceramic sealer (TotalFill BC) was used. After one week, the retreatment of all specimens was performed using Reciproc instruments. To analyze the differences in the filling remnants, specimens were scanned in a micro-CT device after obturation and after the retreatment procedure. Statistical analysis was performed using the Mann–Whitney U test (p < 0.05). A combination of bioceramic sealer and bioceramic gutta-percha was more effectively removed from canals using a reciprocating instrument, with a filling remnants volume of 4.01 ± 3.13 mm3, in comparison to the combination of epoxy resin-based sealer and gutta-percha (6.96 ± 2.70 mm3) (p < 0.05). A reciprocating instrument was more effective in removing bioceramic sealers than epoxy resin-based sealers, although none of the root canal filling materials were completely removed from the root canals.

Download Full-text

Comparative evaluation of sealing ability of different obturation materials

Srpski arhiv za celokupno lekarstvo ◽

10.2298/sarh1006287m ◽

2010 ◽

Vol 138 (5-6) ◽

pp. 287-291 ◽

Cited By ~ 3

Author(s):

Irena Melih ◽

Ankica Jakovljevic ◽

Milica Popovic ◽

Dragana Pesic

Keyword(s):

Root Canal ◽

In Vitro Study ◽

Control Group ◽

Root Canal Filling ◽

Single Root ◽

Dye Penetration ◽

Filling Materials ◽

Gutta Percha ◽

Ah Plus

Introduction Root canal filling materials are intended to prevent microleakage and passing of microorganisms and their toxins along the root canal space and into the periradicular tissues. Objective Objective of this in vitro study was to evaluate and compare apical leakage of root canals obturated using a modified warm vertical condensation technique and different materials. Methods Sixty-five extracted single-root teeth were prepared according to the crown-down/ step-back technique. Each canal was rinsed with 3% NaOCl during and after the preparation. The teeth were divided into 3 groups. Every group was obturated by the same technique, but with different materials: RealSeal system (SybronEndo), gutta-percha with AH Plus (Dentsply Maillefer) and gutta-percha with Acroseal sealer (Septodont). The remaining 20 teeth were in the control group. The teeth were immersed in 1% methylene blue for 72 hours. After that period, the roots were split longitudinally, and dye penetration was measured using a stereomicroscope. Results Dye penetration occurred in all groups. The least dye penetration occurred in the RealSeal group (0.33?}0.29 mm), while the highest dye penetration occurred in the Acroseal group (1.11?}0.52 mm). According to the Student's t-test, Acroseal showed significantly more leakage (p<0.001) than RealSeal and AH Plus materials. The microleakage of RealSeal system was not significantly different (p>0.05) from that of AH Plus sealer with gutta-percha. Conclusion The results suggested that new material Resilon (RealSeal) and conventional combination AH Plus with gutta-percha had the least apical dye penetration and provided the best sealing.

Download Full-text