scholarly journals Can Type of Instrumentation and Activation of the Final Irrigant Improve the Obturation Quality in Oval Root Canals? A Push-Out Bond Strength Study

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Ajinkya M. Pawar ◽  
Anda Kfir ◽  
Zvi Metzger ◽  
Anuj Bhardwaj ◽  
Yeyen Yohana ◽  
...  
Keyword(s):  
Bond Strength ◽  
File Systems ◽  
Adhesive Failure ◽  
Passive Ultrasonic Irrigation ◽  
Root Canals ◽  
Filling Materials ◽  
Gutta Percha ◽  
Ah Plus ◽  
Ultrasonic Irrigation ◽  
Push Out

To appraise the outcome of file systems and activation of the final irrigant on the push-out bond strength of root fillings in oval canals. Single-rooted mandibular premolars (n = 180) with oval canals were divided into three groups (n = 60) for instrumentation: ProTaper Next (PTN), WaveOne (WO), and Self-adjusting File (SAF). The specimens were further divided into subgroups (n = 20) and subjected to final irrigation with activation by EndoActivator or passive ultrasonic irrigation or without activation. Then, the specimens were again subdivided (n = 10) and obturated with gutta-percha and AH Plus (GP-AH) or C-Point with EndoSequence bioceramic sealer (C-EBC). One-millimeter-thick horizontal slices were cut from the apical third of the root, 5 mm from the apex, and subjected to push-out bond strength (BS) testing. Specimens for which SAF was used exhibited higher BS values than those for which PTN or WO was used (p < 0.05). Activation of the final irrigation did not affect the BS of the root fillings. Root fillings made of C-EBC presented a higher BS than those made of GP-AH (p < 0.05). Adhesive failure was more common with specimens instrumented using PTN and WO. Root canals instrumented with SAF, showed the highest bond strength values for both root filling materials. The C-EBC produced significantly higher bond strength values than those of the GP-AH.

scholarly journals New Methodology to Evaluate Bond Strength of Root-End Filling Materials

2015 ◽  
Vol 26 (3) ◽  
pp. 288-291 ◽  
Author(s):  
Jorge Henrique Stefaneli Marques ◽  
Yara Teresinha Corrêa Silva-Sousa ◽  
Fuad Jacob Abi Rached-Júnior ◽  
Jardel Francisco Mazzi-Chaves ◽  
Carlos Eduardo Saraiva Miranda ◽  
...  
Keyword(s):  
Bond Strength ◽  
Horizontal Plane ◽  
Acrylic Resin ◽  
Specimen Preparation ◽  
Filling Material ◽  
Material Data ◽  
Crosshead Speed ◽  
Filling Materials ◽  
Gutta Percha ◽  
Push Out

This study evaluated the bond strength of root-end filling materials to root-end cavities using a new methodology. Twenty maxillary central incisors were subjected to biomechanical preparation (#80 hand file) and sectioned transversally 2 mm short of the apex and 4 mm coronally to this point. The root cylinders were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. Two groups (n=10) were formed according to the root-end filling material: MTA and Super EBA. A gutta-percha cone (#80) was tug-backed at the limit between the canal and the root-end cavity. The cavity was filled and the gutta-percha cone was removed after complete setting of the sealer. The specimens were placed in an Instron machine with the root-end filling turned downwards. The push-out shaft was inserted in the space previously occupied by the gutta-percha cone and run at a crosshead speed of 1.0 mm/min for pushing out the root-end filling material. Data were analyzed by ANOVA (α=5%). Super EBA (6.03±1.31) presented higher bond strength (MPa) than MTA (1.81±0.45) (p>0.05). There was a predominance of cohesive failures for Super EBA and mixed for MTA. The protocol of specimen preparation is effective and introduces a specific methodology for assessing bond strength of root-end filling materials to dentin. Among the materials, Super EBA presented the highest bond strength.

scholarly journals Push-out Bond Strength of Root-end Filling Materials

2016 ◽  
Vol 27 (3) ◽  
pp. 332-335 ◽  
Author(s):  
Rodrigo Ricci Vivan ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
Roberta Bosso-Martelo ◽  
Bernardo Cesar Costa ◽  
Marco Antonio Hungaro Duarte ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Bond Strength ◽  
Mechanical Test ◽  
Test Machine ◽  
Adhesive Failure ◽  
Root Canal Preparation ◽  
Significance Level ◽  
Tukey Test ◽  
Filling Materials ◽  
Push Out

Abstract The aim of this study was to evaluate the bond strength of root-end filling materials. Forty 2-mm-thick slices were obtained from human single-rooted teeth. After root canal preparation using a 1.5 mm diameter cylindrical drill, the dentinal walls were prepared by diamond ultrasonic tip (CVD T0F-2). The specimens were divided according the material (n=10): MTA Angelus (MTAA), MTA Sealer (MTAS, experimental), Sealer 26 (S26) and zinc oxide and eugenol cement (ZOE). The push-out test was performed in a mechanical test machine (EMIC DL 2000) at 1 mm/min speed. The failure type was evaluated by stereomicroscopy. The results were subjected to ANOVA and Tukey test, at 5% significance level. MTAA (19.18 MPa), MTAS (19.13 MPa) and S26 (15.91 MPa) showed higher bond strength (p<0.05). ZOE (9.50 MPa) showed the least bond strength values (p<0.05). Adhesive failure was prevalent in all groups, except for ZOE, which showed mixed failures. It was concluded that root-end filling materials MTA Angelus, MTA Sealer and Sealer 26 showed higher bond strength to dentinal walls than zinc oxide and eugenol cement after retrograde preparation.

scholarly journals Push-Out Bond Strength and SEM Evaluation in Roots Filled with Two Different Techniques Using New and Conventional Sealers

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1620 ◽  
Author(s):  
Pervin Dabaj ◽  
Atakan Kalender ◽  
Ayce Unverdi Eldeniz
Keyword(s):  
Bond Strength ◽  
Delivery System ◽  
Calcium Silicate ◽  
Root Canals ◽  
Group 4 ◽  
Significant Difference ◽  
Ah Plus ◽  
Bond Strengths ◽  
Push Out ◽  
Group 1

The aim of this study was to evaluate the influence of calcium-silicate-based sealer (Endosequence-BC-Sealer) in roots, filled with thermo-plasticized injectable technique aided by Calamus-Flow-Delivery-System, on bond strength to radicular dentin, in comparison with conventional epoxy-resin-based sealer (AH-Plus) along with cold-lateral-compaction technique. Root canals of mandibular-premolar teeth (n = 80) were instrumented using Protaper Universal rotary files and were randomly divided into four experimental groups (n = 20) as follows: (1) AH-Plus + cold-lateral-compaction technique; (2) Endosequence-BC-Sealer + cold-lateral-compaction technique; (3) AH-Plus + thermo-plasticized injectable technique; and (4) Endosequence-BC-Sealer + thermo-plasticized injectable technique. Horizontal disc shaped samples from each group (n = 60/group) were obtained and push-out bond strength testing was performed at a cross-head speed of 0.5 mm/min. Data were analyzed statistically using nonparametric Kruskal-Wallis analysis and Mann-Whitney test (p < 0.001). The statistical analysis revealed a significant difference amongst the groups (p < 0.001). The highest bond strength values were found in group 1 compared with all the other experimental groups (p < 0.001), whereas the lowest bond strength values were found in group 4 (p < 0.001). It was concluded that thermo-plasticized injectable technique with Calamus-Flow-Delivery-System lowered the bond strengths of the sealers, especially Endosequence-BC-Sealer. Therefore, this technique is not recommended to calcium-silicate-based sealers. Further studies are needed to confirm the findings of this study.

scholarly journals Effect of obturation technique with immediate and delayed post space preparation on apical voids and bond strength of apical gutta-percha

2018 ◽  
Vol 47 (1) ◽  
pp. 470-480 ◽  
Author(s):  
Weilin Long ◽  
Jing Li ◽  
Yiwen Liu ◽  
Hongwei Jiang
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Continuous Wave ◽  
Volumetric Analysis ◽  
Micro Computed Tomography ◽  
Filling Materials ◽  
Gutta Percha ◽  
Percentage Volume ◽  
Post Space ◽  
Push Out

Objective The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. Methods The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. Results No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. Conclusions The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.

scholarly journals Efficacy of an Organic Solvent and Ultrasound for Filling Material Removal

2013 ◽  
Vol 24 (6) ◽  
pp. 585-590 ◽  
Author(s):  
Gabriela Guardiola Muller ◽  
Anielle Pinheiro Schonhofen ◽  
Patricia Maria Poli Kopper Mora ◽  
Fabiana Soares Grecca ◽  
Marcus Vinicius Reis So ◽  
...  
Keyword(s):  
Root Canal ◽  
Filling Material ◽  
Control Groups ◽  
Passive Ultrasonic Irrigation ◽  
Universal System ◽  
Gutta Percha ◽  
Ah Plus ◽  
Ultrasonic Irrigation ◽  
Post Hoc ◽  
Endodontic Retreatment

The aim of this study was to investigate whether a final rinse with Endosolv R® solvent and ultrasound resulted in cleaner root canal walls during endodontic retreatment. A total of 56 extracted premolar teeth were manually instrumented using a step-back flare technique and filled with gutta-percha and AH Plus sealer. After 9 months, the canals were retreated by removing the gutta-percha and sealer with ProTaper Universal Retreatment and rotary preparation with ProTaper Universal System up to an F5 file. As a final step, the teeth were randomly divided in 4 groups (n=14) and were subjected to passive ultrasonic irrigation (PUI) with either Endosolv R or distilled water. In the control groups, the irrigants were left undisturbed. Roots were cleaved and examined under scanning electron microscopy (SEM), and the amount of filling remnants on the canal walls was assessed by two calibrated examiners in a blinded fashion. Data were analyzed by the Kruskal-Wallis test and the Student-Newman-Keuls post hoc test (α=0.05). All groups presented filling debris in the three root canal thirds after retreatment. There were no significant differences between the groups or among the root canal thirds within each group (p>0.05). PUI with Endosolv R was not effective in the removal of filling debris from root canal walls.

scholarly journals Duration of Immersion and Type of Immersion Solution Distort the Outcome of Push-Out Bond Strength Testing Protocols

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2860
Author(s):  
David Donnermeyer ◽  
Lena Göbell ◽  
Sebastian Bürklein ◽  
Till Dammaschke ◽  
Edgar Schäfer
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Ethylenediaminetetraacetic Acid ◽  
Root Canals ◽  
Immersion Medium ◽  
Immersion Period ◽  
Ah Plus ◽  
Phosphate Buffered Saline ◽  
Testing Protocols ◽  
Push Out

This study aimed to investigate the influence of immersion duration and the type of immersion solution on the outcome of push-out bond strength (POBS) tests. Root canals of 120 straight single-rooted teeth were instrumented to a diameter of 1.5 mm and irrigated with 5 mL of 3% NaOCl. Four horizontal slices with a thickness of 1 mm were cut, representing the mid-portion of the root. The specimens (n = 480) were irrigated with 17% ethylenediaminetetraacetic acid(EDTA) for 60 seconds, then twice with distilled water (DW) for 30 s each. The canals were filled with either AH Plus (Dentsply Sirona, Konstanz, Germany) or BioRoot RCS (Septodont, St. Maur-des-Fossés, France) (n = 240). Separated into four groups per type of sealer (n = 60), the specimens were incubated at 37 °C covered with gauze moistened in DW or phosphate-buffered saline (PBS) for either one or eight weeks. Dislodgement resistance was measured and POBS was calculated. Statistical analysis was performed using the analysis of variance (ANOVA) test and the Student–Newman–Keuls test (p = 0.05). AH Plus showed higher POBS when stored in PBS compared to DW, irrespective of the incubation period (p < 0.05). BioRoot RCS displayed higher POBS when stored in DW compared to PBS after eight weeks of incubation (p < 0.05). No difference was found after one week of incubation (p > 0.05). Irrespective of the sealer or the immersion solution, POBS decreased from one week to eight weeks (p < 0.05). Mixed failure modes were found in all groups irrespective of sealer, immersion medium, or immersion period. POBS decreased after a longer incubation time in both immersion solutions. Duration of immersion and the type of immersion solution had a significant impact on the outcome of the POBS testing protocol.

scholarly journals Efficacy of passive ultrasonic irrigation in removing root filling material during endodontic retreatment

2016 ◽  
Vol 45 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Carina MICHELON ◽  
Marina FRIGHETTO ◽  
Pauline Mastella LANG ◽  
Mariana De Carlo BELLO ◽  
Rafael PILLAR ◽  
...  
Keyword(s):  
Filling Material ◽  
Root Canal Filling ◽  
Passive Ultrasonic Irrigation ◽  
Root Canals ◽  
Filling Materials ◽  
Complex Anatomy ◽  
Ultrasonic Irrigation ◽  
Canal Shaping ◽  
Student’S T ◽  
Endodontic Retreatment

Abstract Introduction The aim of endodontic retreatment is to remove the previous root filling materials completely to allow for the subsequent steps of cleaning, canal shaping and filling replacement. Objective To evaluate the efficacy of passive ultrasonic irrigation (PUI) in the removal of residual root filling material after removing the bulk of the root filling with nickel-titanium rotary instruments. Material and method Eighteen mesial isthmus-containing roots of human mandibular molars were prepared and filled. The root canal filling was removed with the ProTaper Retreatment system and K-files. The specimens were randomized into 2 groups (n = 9), both irrigated with 2.5% NaOCl and 17% EDTA. In the conventional group, an irrigation syringe was used. In the PUI group, the PUI technique was used. The roots were sectioned longitudinally and evaluated under stereomicroscopy. Student’s t test was used to compare groups and the general linear model was used to compare the apical, cervical, and middle root thirds within each group, in regard to the percentages of remaining residual filling material. Result There was no statistically significant intergroup difference, irrespective of which root third was evaluated (P > 0.05). In the PUI group, the apical third showed a significantly higher percentage of residual filling material, in comparison with the cervical (P = 0.038) and middle (P = 0.029) thirds. Conclusion The PUI technique was not more effective than the conventional irrigation technique in removing residual root filling material during endodontic retreatment in root canals with a complex anatomy.

scholarly journals The Effect of 2% Chlorhexidine on the Bond Strength of Two Different Obturating Materials

2014 ◽  
Vol 15 (1) ◽  
pp. 82-85 ◽  
Author(s):  
K Dinesh ◽  
BV Sreenivasa Murthy ◽  
Indiresha H Narayana ◽  
Swaroop Hegde ◽  
KS Madhu ◽  
...  
Keyword(s):  
Bond Strength ◽  
Chlorhexidine Gluconate ◽  
Gutta Percha ◽  
Ah Plus ◽  
Group 2 ◽  
Push Out ◽  
Group 1

ABSTRACT The bond strength of ActiV GP and gutta-percha/AH plus after using 2% CHX as final rinse was evaluated in this study. According to the final irrigation regimen forty roots were divided into two groups (n = 20) randomly Group 1—5 ml of 17% EDTA; Group 2—5 ml of 17% EDTA followed by 5 ml of 2% chlorhexidine gluconate (CHX). Based on the obturation system the two groups were further subdivided into two subgroups (n = 10). The roots were horizontally sectioned from the coronal and midthird sections for measuring the push-out bond strength. CHX/AH Plus (2.795 ± 0.42 MPa) and EDTA/ActiV GP (1.489 ± 0.117 MPa) recorded the highest and lowest mean bond strength values respectively. It was concluded that when 2% CHX was used as a final irrigation rinse the bond strength of both guttapercha/AH Plus and ActiV GP obturation system improved significantly. How to cite this article Dinesh K, Murthy BVS, Narayana IH, hegde S, Madhu SK, Nagaraja S. The effect of 2% chlorhexidine on the bond strength of two different obturating materials. J Contemp Dent Pract 2014;15(1):82-85.

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