scholarly journals Effect of a sonic device on bonding of fiberglass posts to root canals

2018 ◽  
Vol 17 ◽  
pp. e18924
Author(s):  
Marina de Almeida Salim ◽  
Thais Mageste Duque ◽  
Heloisa Carla Dell Santo Gusman ◽  
Carolina Oliveira de Lima ◽  
Brenda Paula Figueiredo de Almeida Gomes ◽  
...  
Keyword(s):  
Root Canal ◽  
Adhesive System ◽  
Resin Cement ◽  
Root Canal Filling ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
Root Dentin ◽  
Post Hoc ◽  
Adhesive Cement

Aim: This study evaluated the effect of a sonic device on the bonding of fiberglass posts cemented with a self-etching adhesive combined with conventional cement or a self-adhesive cement to root dentin. Methods: Forty single-rooted bovine incisors were endodontically prepared using a step-back technique. Gutta-percha and AH Plus sealer were used for root canal filling, combined with a thermoplasticization technique. After 1 week, the post space was prepared and the roots were divided into four groups according to the following factors: adhesive system/resin cement (Ambar/ AllCem Core [FGM] and RelyX U200 [3M]) and application mode (manual or sonic). The posts were cemented and the roots were cut into discs and submitted to push-out bond strength (POBS) test. The failure mode was evaluated using a stereoscope at 25x magnification. The data were analyzed statistically using ANOVA and Tukey’s post-hoc test (α = 0.05). Results: The sonically activated RelyX U200 group was superior to the other groups. RelyX U200 manually applicated showed similar results to those of sonically activated Âmbar/AllCem. These three groups outperformed the Âmbar/AllCem manually applicated group. Adhesive failure between dentin and resin cement was the most predominant pattern. Conclusion: Sonic application of self-etching adhesive and self-adhesive cement improved the POBS of fiber posts to the root canal.

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 Influence of different surface treatments of fiberglass posts on the bond strength to dentin

2017 ◽  
Vol 15 (2) ◽  
pp. 158 ◽  
Author(s):  
Bruna Cristina do Nascimento Rechia ◽  
Ruth Peggy Bravo ◽  
Naylin Danyele de Oliveira ◽  
Flares Baratto Filho ◽  
Carla Castiglia Gonzaga ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Mean Value ◽  
Surface Treatments ◽  
Mean Values ◽  
Root Canals ◽  
Hot Air ◽  
Gutta Percha ◽  
Ah Plus ◽  
Root Dentin

Aim: To assess the influence of different fiberglass post surface treatments on the bond strength (BS) to root dentin. Methods: Thirty bovine root canals were endodontically treated and filled with gutta-percha and AH Plus sealer. At 24 h after the endodontic filling, the post spaces were prepared with Gates-Glidden drills and #3 drills of the DC White Post system, maintaining a 4 mm apical seal. The roots were randomly divided into three groups: S (fiberglass posts treated with silane), SA (fiberglass posts treated with silane and a hydrophobic adhesive system) and SHA (fiberglass posts treated with silane, followed by drying with hot air). The posts were cemented with a selfadhesive cement (RelyX U200). The specimens were stored in distilled water at 37 °C for 24 h and subjected to the push-out test (0.5 mm/min). Data were statistically analyzed using one-way ANOVA and Tukey's test (α=0.05) Results: SA and SHA groups showed the highest BS mean values (11.29 and 10.85 MPa, respectively), while the S group presented the lowest BS mean value (7.21 MPa). S group was significantly different from SA and SAH groups. Conclusions: The surface treatment of fiberglass posts influenced BS values.

scholarly journals Sealing Ability of AH Plus and GuttaFlow Bioseal

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.

scholarly journals Influence of calcium hydroxide points on the quality of intracanal dressing filling

2006 ◽  
Vol 14 (3) ◽  
pp. 219-223 ◽  
Author(s):  
Nicole de Mello Rahde ◽  
José Antonio Poli Figueiredo ◽  
Elias Pandonor Motcy Oliveira
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal Filling ◽  
Human Teeth ◽  
Significance Level ◽  
Root Canals ◽  
Gutta Percha ◽  
Group 2 ◽  
Post Hoc

PURPOSE: The aim of this study was to evaluate, in vitro, the quality of calcium hydroxide [Ca(OH)2] paste filling (Ultracal, Ultradent) associated or not with Ca(OH)2-containing gutta-percha points (Calcium Hydroxide Plus PointsTM, Roeko) in curved root canals. MATERIAL AND METHODS: One hundred and twenty roots of extracted human teeth, randomly divided into three curvature ranges (mild - 0 to 14º; moderate - 15º to 29º; severe - >30º) were used. After chemomechanical preparation, the roots were assigned to 4 groups (n=30), according to the technique of intracanal dressing placement: group 1 - Ca(OH)2 paste was applied with a lentulo spiral; group 2 - Ca(OH)2 paste was applied with a lentulo spiral and a Ca(OH)2 point was inserted into the canal; group 3 - Ca(OH)2 paste was applied with a NavitipTM tip (supplied with Ultracal system); group 4 - Ca(OH)2 paste was applied with a NavitipTM tip and a Ca(OH)2 point was inserted into the canal. The roots were cleared and the quality of apical third filling was assessed by a calibrated experienced examiner. The specimens were examined under stereomicroscopy and scored 1 to 4 (i.e., from inadequate to complete root canal filling). The results were analyzed statistically by ANOVA and Duncan's post hoc test at 5% significance level. RESULTS: There were no statistically significant differences (p>0.05) among the curvature degrees in groups 1, 3 and 4. Severely curved roots in group 2 presented bordering significance (p=0.05). The groups that associated the use of Ca(OH)2 paste and points (2 and 4) showed better apical filling than the other groups, but this difference was statistically significant (p<0.001) only for roots with severe curvature. CONCLUSION: According to the results of this study, the curvature degree did not influence the quality of filling. The techniques that used Ca(OH)2-containing gutta-percha points yielded better filling of the apical third in roots with severe curvature.

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 Root Dentin Strain and Temperature Rise During Endodontic Treatment and Post Rehabilitation

2013 ◽  
Vol 24 (6) ◽  
pp. 591-598 ◽  
Author(s):  
Euridsse Sulemane Amade ◽  
Veridiana Resende Novais ◽  
Marina Guimaraes Roscoe ◽  
Fabiane Maria Ferreira Azevedo ◽  
Aline Aredes Bicalho ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Root Canal ◽  
Root Surface ◽  
Endodontic Treatment ◽  
Resin Cement ◽  
Cervical Region ◽  
Apical Region ◽  
Root Canal Filling ◽  
Root Dentin ◽  
Post Space

This study investigated the effects of endodontic treatment procedures and different post systems rehabilitation steps on the strain and temperature rise on apical and cervical root dentin regions. Twenty-one extracted human canine teeth had two strain gages attached to the distal root surface and two thermocouples attached to the mesial root surface (cervical and apical). The strain and temperature rise were recorded during the following procedures: root canal preparation, final rinse and drying, root canal filling and canal relief. Then the teeth were divided into three groups (n=7), according to the type of post system: CPC, cast post and core; FGP, fiberglass post; and PSP, prefabricated steel post. Data continued to be recorded during the post space preparation, post modeling (only for CPC), post trying and post cementation. Data were subjected to a two-way ANOVA followed by Tukey's test (α=0.05). The post-space preparation caused the highest temperature rise (4.0-14.9 °C) and the highest strain in the apical region during irrespective of post type. The resin cement light-activation resulted in significant temperature increases in the cervical region for all of the groups. The canal relief and the post-space preparation produced highest temperature rises. The CPC post modeling resulted in higher root strain level similarly the level of post preparation. The PSP resulted in highest strain during post trying and post cementation.

scholarly journals Evaluation of the Influence of the Nd:YAG Laser and Different Irrigants on the Bond Strength of the Adhesion of the Fiber Posts to Root Dentin using a Self-etching Adhesive System

2013 ◽  
Vol 4 (3) ◽  
pp. 170-174
Author(s):  
Cesar Rogério Pucci ◽  
Carlos Rocha Gomes Torres ◽  
Cláudio Antonio Talge Carvalho ◽  
Ana Julia Farias Lacerda ◽  
Marina Gullo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Adhesive System ◽  
Root Canal Filling ◽  
Yag Laser ◽  
Fiber Posts ◽  
Significant Difference ◽  
Root Dentin

ABSTRACT Aim The aim of this study was to investigate the effects of pretreatment of different irrigating solutions with and without the application the Nd: YAG laser on the bond strength (RU) of the adhesion of the fiberglass post relined with resin composite to the root dentin. Materials and methods Sixty-six single bovine incisor roots were divided into 6 groups according to irrigating solution and with/without the apllication of the Nd: YAG laser after root canal filling: S- saline; C-2% chlorhexidine solution, H-2.5% sodium hypochlorite; SL-saline + laser, CL-2% chlorhexidine + laser; HL-2.5% sodium hypochlorite + laser (all n = 11). The roots were standardized up to a file # 80 and root-filled with gutta-percha (Dentsply) and Sealer 26 (Dentsply) by lateral condensation. The root canal filling was partly removed. Afterward, root canals were irrigated with 5 ml of the selected irrigant and the fiberglass post were cemented with epoxy resin curing dual Bifix QM (VOCO) and a self-etch adhesive system Futurabond DC (VOCO). All roots were sectioned transversely, and the push-out tested was performed. The bond strength means were analyzed by the analysis of variance and Tukey test (α= 5%). Results The following bond strength MPa values—were recorded for each group: group C—7.77(±1.8)a, LC—6.46 (±2.2)a, S7.33 (±2.2)a, LS 7.35 (±1.68)a, H 5.43 (±1,3)b, LH 5.13 (±1,6)b. A signifcant bond strenght decrease was noticed with the use of 2.5% NaOCl (p < 0.05). No statistical significant difference were found with our without the apllication of the Nd:YAG laser (p > 0.05). Conclusion Regardless the irrigant tested, the use of Nd: YAG laser can be indicated prior to cementation of fiberglass without loss in bond strength. How to cite this article Pucci CR, Lacerda AJF, Gullo M, Xavier ACC, Torres CRG, Martinho FC, Carvalho CAT. Evaluation of the Influence of the Nd:YAG Laser and Different Irrigants on the Bond Strength of the Adhesion of the Fiber Posts to Root Dentin using a Self-etching Adhesive System. World J Dent 2013;4(3):170-174.

scholarly journals Influence of different burs and acid ultrasonic agitation on the bonding of fiber posts to root dentin

2018 ◽  
Vol 17 ◽  
pp. e181358
Author(s):  
Julio Cezar Chidoski-Filho ◽  
Giovana Mongruel Gomes ◽  
Bruna Fortes Bittencourt ◽  
Alessandra Reis ◽  
Osnara Maria Mongruel Gomes ◽  
...  
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Adhesive System ◽  
Cross Product ◽  
Resin Cement ◽  
Ultrasonic Agitation ◽  
Diamond Bur ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Root Dentin

Aim: The objective is to evaluate the influence of different burs used to prepare the root canal space and acid ultrasonic agitation on bond strength (BS) between glass fiber posts (GFP) and root dentin. Methods: After endodontic treatment, the root canal spaces of 36 extracted human canines were prepared, according to the rotary instrument used (n=18): carbide bur (CB), provided by the post manufacturer and a diamond bur (DB). In both groups, the fiber posts were cemented with the adhesive system Ambar and resin cement Allcem, following the manufacturer`s instructions. Previously to the cementation procedures, the groups were subdivided into 2 groups (n=9), according to the phosphoric acid application mode: conventional etching (CE) and active etching (AE), performed by ultrasonic tip, both for 15s. Before the cementation procedures and after the acid application, 1 root of each group was randomly selected for ultrastructural morphological evaluation by SEM. After 1 week of the cementation, 8 specimens per group were transversely sectioned into six 1-mm thick slices, the root canal regions (cervical, medium and apical) were identified and the push-out test was performed to evaluate BS. Data were analyzed by 3-way ANOVA and Tukey test (α=0.05). Results: The results showed that the cross-product interaction of all factors was significant (P=0.035). Higher bond strength values were obtained when a DB with conventional etching, instead of CB, was used to prepare the root post space. Conclusion: It may be concluded that the use of diamond burs with conventional etching yields high BS values in all root canal thirds.

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

2017 ◽  
Vol 20 (1) ◽  
pp. 80 ◽  
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

<p><strong>Objective: </strong>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. <strong>Material and Methods:</strong> 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 &lt; 0.05). <strong>Results: </strong>Radiographic and SEM analysis showed that material from the<strong> </strong>MTA Fillapex group was better removed than that from Endofill, Sealapex, AH Plus and Real Seal groups. <strong>Conclusion: </strong>After re-instrumentation<strong>, </strong>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.</p><p><strong>Keywords </strong></p><p>Dental radiography; Endodontic retreatment; Root canal filling materials; Scanning electron microscopy.</p>

scholarly journals The Effect of Ultrasonic Agitation on the Porosity Distribution in Apically Perforated Root Canals Filled with Different Bioceramic Materials and Techniques: A Micro-CT Assessment

2021 ◽  
Vol 10 (21) ◽  
pp. 4977
Author(s):  
Saulius Drukteinis ◽  
Goda Bilvinaite ◽  
Hagay Shemesh ◽  
Paulius Tusas ◽  
Vytaute Peciuliene
Keyword(s):  
Root Canal ◽  
Micro Computed Tomography ◽  
Root Canal Filling ◽  
Porosity Distribution ◽  
Significance Level ◽  
Ultrasonic Agitation ◽  
Root Canals ◽  
Gutta Percha ◽  
Before And After ◽  
Rotary Instrument

The present study evaluated the effect of ultrasonic agitation on the porosity distribution of BioRoot RCS/single gutta-percha cone (BR/SC) and MTA Flow (MF) root canals fillings used as apical plugs in moderately curved and apically perforated roots. Eighty mesial root canals of mandibular first molars were enlarged up to ProTaper NEXT X5 rotary instrument 2 mm beyond the apical foramen, simulating apical perforations. Specimens were randomly divided into four experimental groups (20 canals per group) according to the material and technique used for root canal obturation: BR/SC, BR/SC with ultrasonic agitation (BR/SC-UA), MF and MF with ultrasonic agitation (MF-UA). The ultrasonic tip was passively inserted into the root canal after the injection of flowable cement and activated for 10 s. The specimens were scanned before and after obturation with a high-resolution micro-computed tomography scanner, and the porosity of the apical plugs was assessed. The differences between groups were analyzed using the Kruskal-Wallis and Mann-Whitney tests, with the significance level set at 5%. None of the obturation materials and techniques used in this study was able to provide a pore-free root canal filling in the apical 5 mm. Considerably higher percentages of open and closed pores were observed in the MF and MF-UA groups, with the highest porosity being in the MF-UA group (p < 0.05). No significant differences were observed between the BR/SC and BR/SC-UA groups, where the quantity of open and closed pores remained similar (p > 0.05).

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