Molhabilidade de um cimento endodôntico à base de resina epóxi na dentina tratada com diferentes protocolos de quelação

2021 ◽  
Vol 11 (3) ◽  
pp. 24-30
Author(s):  
Marcela Baraúna Magno ◽  
Maíra do Prado ◽  
Renata A. Simão ◽  
Kawanne Ferreira Moraes Medeiros ◽  
Patricia de Almeida Rodrigues ◽  
...  
Keyword(s):  
Smear Layer ◽  
Ah Plus

Objetivo: Avaliar a molhabilidade do cimento AH Plus em contato com a dentina radicular após diferentes protocolos quelantes envolvendo ácido etidrônico (HEBP) e o EDTA. Métodos: Cinquenta e seis fatias de dentina radicular foram utilizadas e irrigadas com 5.25% de hipoclorito de sódio (NaOCl) ou com uma mistura de 5.25%NaOCl/18%HEBP para simular a irrigação durante o preparo químico-mecânico. As amostras irrigadas com NaOCl foram divididas em 5 grupos, de acordo com o agente quelante: G1- água destilada (AD); G2-17%EDTA; G3-17%EDTA+2.5%NaOCl; G4-18%HEBP; e G5-18%HEBP+2.5%NaOCl. As amostras irrigadas com a mistura de NaOCl/HEBP foram dividias em 2 grupos: G6-AD; G7-NaOCl/HEBP+2.5%- NaOCl. Todos os protocolos receberam irrigação de AD entre as substâncias irrigadoras e como lavagem final. O goniômetro Rame-Hart foi utilizado para mesurar o ângulo de contato entre a superfície da dentina radicular e o cimento. O teste estatístico Kruskal-Wallis e Dunn foram aplicados (p<0.05). Resultados: Os grupos onde a smear layer foi removida apresentaram menor ângulo de contato (p<0.05), com exceção do G7. O G6 apresentou o menor ângulo de contato do AH Plus, entretanto, a irrigação final com NaOCl (G7) aumentou significativamente o ângulo de contato. G2 e G4 apresentaram comportamento similar e a irrigação final com NaOCL (G3 e G4) não modificou a molhabilidade da dentina. Conclusão: O tratamento da dentina radicular com a mistura NaOCl/HEBP, quando usada como irrigante, conferiu boa molhabilidade desta superfície ao cimento AH Plus.

scholarly journals Sealing ability of two commonly used root canal sealers with and with out smear layer

2014 ◽  
Vol 2 (4) ◽  
pp. 327
Author(s):  
Nazish Fatima ◽  
Mehwish Hussain
Keyword(s):  
Smear Layer ◽  
Repeated Measure ◽  
Time Interval ◽  
Sealing Ability ◽  
Nail Polish ◽  
Ah Plus ◽  
Time Periods ◽  
Group 2 ◽  
Crown Roots ◽  
Group 1

AIM: The aim of current research was to find out the sealing ability of two commonly used sealers in the presence and absence of smear layer at different time interval. MATERIAL AND METHODS: Total of 180 single rooted vital teeth were used. Transversal section was made with the help of digital slow speed cutting saw to divide the root and crown part. After removal of crown roots part was instrumented and prepared. The 180 teeth were randomly divided into two equal groups (n=90) 1 and 2. In group 1 the smear layer was kept intact but it was removed from group 2 with EDTA (17%). Group 1 was then divided into two sub-groups, A1, A2. Group 2 was again separated into two sub-groups, B1 and B2. Each sub-group contained of 45 samples. In sub-groups A1 and B1, AH Plus sealer, in sub-groups A2 and B2, Ketac-endo sealer and cold lateral condensation technique was used for obturation with gutta percha. All samples were kept in an incubator at 37°C for 24 hours, with help of nail polish/varnish all samples root surfaces was painted only excluding apical area after words each sub group were further divided in to three groups of 15 to represent immersion periods of 7,15 and 30 days. All samples were then kept in 5 % methylene blue dye solution at 37o c for their respective time periods. After specific time period, the roots of every group were cut longitudinally and evaluate under a stereomicroscopes to evaluate apical micro leakage in millimeter. Data was subjected to Repeated measure ANOVA with post-hoc analysis using Tukey and bonferroni tests. RESULTS: Overall analysis indicated significant reduction in sealing ability canals in with and without smear layer over different time periods (p <0.0001). CONCLUSION: Current study has concluded that AH plus sealer provides significantly better seal in the absence of smear layer than in the presence of smear layer in addition it gave better seal than Ketac-Endo sealer in the absence and presence of smear layer.

An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser

2013 ◽  
Vol 14 (2) ◽  
pp. 183-187 ◽  
Author(s):  
G Anil Kumar ◽  
Maneesha Das ◽  
Sindhu Ramesh ◽  
Surendranath Garapati
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Smear Layer ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Group Iii ◽  
Group I ◽  
Ah Plus

ABSTRACT Background Smear layer is a negative factor which prevents adhesion of the filling material to the dentinal walls. Recent advances in dental research have incorporated lasers as a potential adjunct in root canal treatment by removing the smear layer before filling the root canal system, enhancing the adhesion of sealers to dentin and improving the sealing ability. Aim To evaluate the microtensile bond strength of AH-Plus resin-based sealer to dentin after treatment with 980 nm diode and 1,064 nm neodymium-doped:yttrium aluminum garnet (Nd:YAG) laser in vitro. Materials and methods Thirty specimens prepared for three groups namely group I (control), group II (980 nm diode–lased specimens) and group III (Nd:YAG–lased specimens). One tooth from each group was observed under scanning electron microscope for evaluation of intracanal root dentin morphology. Remaining specimens were used for making microsections by hard tissue microtome. Specimens for groups II and III were lased with 980 nm diode and 1,064 nm Nd:YAG laser. AH Plus sealer was applied onto specimens and mounted onto Instron universal testing machine for microtensile bond strength testing. Results were subjected to statistical analysis using one-way analysis of variance (ANOVA) and Tukey's test. Results Group III Nd:YAG had maximum mean microtensile bond strength values (11.558 ± 0.869), followed by group II diode (9.073 ± 0.468) and group I control (6.05 ± 0.036). Statistically significant differences were seen among all the groups. SEM analysis shows removal of smear layer in both groups II and III. Conclusion Both Nd:YAG and diode laser were more effective than control group in improving the microtensile bond strength of AH Plus sealer to dentin. Clinical significance Lasers have the potential to increase the adhesiveness of root canal sealer to dentin surface, thereby improving the quality of root canal obturation. How to cite this article Maneesha D, Anil KG, Sindhu R, Surendranath G, Deepak S. An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser. J Contemp Dent Pract 2013;14(2): 183-187.

scholarly journals In vitro evaluation of coronal microleakage associated with two root obturation techniques

2007 ◽  
Vol 54 (3) ◽  
pp. 184-190 ◽  
Author(s):  
Slavoljub Zivkovic ◽  
Borislava David-Burlica ◽  
Jelena Stanisic ◽  
Sonja Stojcic ◽  
Milica Medojevic-Jovanovic ◽  
...  
Keyword(s):  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Smear Layer ◽  
Human Teeth ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
The Difference ◽  
Micrometer Scale

Aim: The purpose of this study was to determine the influence of the smear layer on the coronal microleakage in root canals obturated with laterally condensed cold gutta-percha or Thermafil and two root canal sealers. Materials and methods: Sixty extracted single-rooted human teeth with straight root canals were allocated to two experimental groups. The root canals were instrumented using the STEP-BACK technique, K reamers and K files and irrigated with 2.5 % NaOCl. The teeth in the first group were treated with 17% EDTA and 2.5 % NaOCl to remove the smear layer. The teeth in both groups were obturated either with laterally condensed cold guttapercha (28 teeth) or Thermafil gutta-percha with plastic cores (28 teeth) and RSA or AH-PLUS sealers. The specimens were evaluated for coronal microleakage using silver nitrate solution. The linear penetration of the dye was assessed using a binocular magnifying glass (x25), with an inserted micrometer scale. Results: The results showed low coronal microleakage in the group where the smear layer was removed in both the lateral compaction technique (RSA - 1.71mm and AHPLUS - 1.61mm) and the Thermafil groups - RSA (1.65mm) and AH-PLUS (1.66mm). In the group with the intact smear layer, greater microleakage was noticed in both groups, lateral compaction technique -RSA (3.06 mm) and AH-PLUS (2.83mm) and Thermafil technique -RSA (2.99mm) and AH-PLUS ( 2.83mm). The difference was statistically significant between the groups with and without the smear layer for both RSA (p< 0.001) and AH-PLUS sealers ( p<0.001). Conclusion: The present results suggest that the removal of the smear layer significantly improves the tightness of the coronal seal and reduces the coronal microleakage.

scholarly journals COMPARATIVE EVALUATION OF THE EFFECT OF SMEAR LAYER REMOVAL WITH EDTA AND ND: YAG LASER ON THE APICAL MICRO LEAKAGE OF TWO EPOXY RESIN BASED ROOT CANAL SEALERS - AN INVITRO STUDY.

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Dhanalakshmi Subramanian ◽  
Mahendran Kavitha ◽  
Anuraag Gurtu ◽  
Bakthavatchalam Balakrishnan ◽  
Mahalakshmi Jayaraman
Keyword(s):  
Nd:Yag Laser ◽  
Smear Layer ◽  
Maxillary Central Incisor ◽  
Layer Removal ◽  
Group 4 ◽  
Significant Difference ◽  
Ah Plus ◽  
Group 3 ◽  
Group 5 ◽  
Group 2

Aim: To compare the effect of smear layer removal with 17% EDTA and Nd:YAG laser on the apical microleakage of two resin based sealers. Materials and Methods: Sixty freshly extracted maxillary central incisor teeth with patent canals were selected. The teeth were debrided and stored in saline for 24 hours before use. The teeth were sectioned at CEJ & cleaning and shaping were done upto 50 size by step back technique. The following groups were analyzed. GROUP 1:  Gutta percha (GP) + AH plus sealer without smear layer removal. GROUP 2:  GP + RC seal sealer without smear layer removal. GROUP 3:  GP + AH plus treated with 17% EDTA. GROUP 4:  GP + RC seal treated with 17% EDTA. GROUP 5:  GP + AH plus treated with Nd:YAG laser. GROUP 6:  GP + RC seal treated with Nd:YAG laser. 8 samples were subjected to dye penetration study for apical microleakage & 2 samples were subjected to SEM in each group to show the effect of smear layer removal by EDTA and laser. The data were analyzed by using ANOVA and TUKEY-HSD test. Results: Groups 1 and 2 showed maximum microleakage , other groups showed lesser microleakage but there was no statistically significant difference between laser and EDTA treated Groups.  Conclusion: EDTA and Nd:YAG laser can be effectively used to  remove smear layer and showed less apical microleakage compared to non-treated groups. Keywords: 17% EDTA, Nd:YAG LASER , AH plus , RC sealer ,  Smear layer.

scholarly journals Effect of peracetic acid used as single irrigant on the smear layer, adhesion, and penetrability of AH Plus

2019 ◽  
Vol 33 ◽  
Author(s):  
Katia Cristina KEINE ◽  
Milton Carlos KUGA ◽  
Fernanda Borges Cunha TORMIN ◽  
Ana Carolina VENÇÃO ◽  
Marco Antonio Hungaro DUARTE ◽  
...  
Keyword(s):  
Peracetic Acid ◽  
Smear Layer ◽  
Ah Plus

scholarly journals Influence of Er: YAG laser irradiation on apical sealing of four different sealers

2004 ◽  
Vol 15 (3) ◽  
pp. 190-193 ◽  
Author(s):  
Isabel Mello ◽  
Carlos Roberto Colombo Robazza ◽  
João Humberto Antoniazzi
Keyword(s):  
Laser Irradiation ◽  
Root Canal ◽  
Er:Yag Laser ◽  
Close Contact ◽  
Smear Layer ◽  
Canal System ◽  
Layer Removal ◽  
Sealing Material ◽  
Ah Plus ◽  
Root Canal System

The sealing of the root canal system is of fundamental importance for successful endodontic treatment. To obtain an adequate apical seal, many factors must be considered such as the presence of smear layer and the sealer applied. After canal preparation, this layer must be removed because it prevents close contact between the dentinal walls and the sealing material. The goal of this study was to evaluate the sealing ability of four different sealers after smear layer removal with either 17% EDTA-T irrigation or Er:YAG laser irradiation of 46 teeth. The canals were sealed with four different sealers: Sealapex, Ketac Endo, AH Plus and N-Rickert. The method for smear layer removal did not influence apical sealing. AH Plus and N-Rickert allowed less dye leakage when compared to Sealapex and Ketac Endo.

EFFECT OF CHITOSAN GEL ON SMEAR LAYER,Ca/P RATIO AND PUSH-OUT BOND STRENGTH OF RESIN SEALERS AT DIFFERENT TIME INTERVALS.

2021 ◽  
pp. 41-44
Author(s):  
Niveditha S ◽  
Veena S Pai ◽  
Roopa R Nadig
Keyword(s):  
Bond Strength ◽  
Root Resorption ◽  
Chitosan Solution ◽  
Smear Layer ◽  
Time Intervals ◽  
Layer Removal ◽  
Ah Plus ◽  
Open Apices ◽  
Push Out ◽  
Chitosan Gel

OBJECTIVE: Comparative evaluation of smear layer removal, calcium phosphate ratio and bond strength of AH Plus sealer to radicular dentin after the use of 0.2% chitosan and 17% EDTAas lubricant and nal rinse at different time intervals(1min and 2min). METHODOLOGY: 75 premolars were prepared using Pro-Taper rotary le. 30 samples were used for testing smear layer removal and Ca/Pratio and 45 samples for testing bond strength. 1ml of 3%NaOCl was used for irrigation of all the samples throughout the preparation. The teeth were randomly divided into 3 groups according to the type of lubricant-17% EDTAgel or 0.2% chitosan gel and the nal irrigant -17%EDTA solutions, 0.2%chitosan solution for 1min and 2min. 30 samples were sectioned longitudinally. One half of the section was used for smear layer analysis using SEM and the other half of the section was used for Ca/Pratio analysis using EDX. 45 samples were obturated with F3 gutta-percha cones using AH plus sealer and sectioned. The samples were subjected to push-out testing using UTM and failure was evaluated using SEM. RESULTS: Smear layer removal and push-out bond strength was found to be highest in EDTA group followed by Chitosan(2min) and Chitosan(1min)groups. EDX analysis showed that the Ca/Pratio of EDTAgroup is signicantly lower than chitosan group. CONCLUSION:Within the limitations of the study it can be inferred that 0.2%chitosan gel lubricant and nal rinse can be used as an alternative to EDTAespecially in teeth with thin dentinal walls, open apices, and root resorption.

scholarly journals Evaluation of Sealing Ability of AH Plus And TG Root Canal Sealers in the Presence and Absence of Smear Layer

2015 ◽  
Vol 1 (2) ◽  
pp. 10-17
Author(s):  
Tahir Ali Khan ◽  
Nighat Shafique ◽  
Mumtaz -Ul- Islam ◽  
Raham Zaman
Keyword(s):  
Root Canal ◽  
T Test ◽  
Smear Layer ◽  
Blue Dye ◽  
P Value ◽  
Sealing Ability ◽  
Nail Polish ◽  
Ah Plus ◽  
Presence And Absence ◽  
Root Canal Sealers

Background:Smear layer is considered to be the main contributing factor in better sealing and adhesion of a sealer.Objective:The aim of this study is to determine the sealing ability of two root canal sealers (AH Plus and tg). In the presence and absence of smear layerMethodology:Extracted teeth from patients visiting Sardar Begum Dental College 60 in numbers were used in this study. Specimens were divided in to two main groups (group1 and group 2) both groups were instrumented using a step back technique. Irrigation was done during instrumentation with one ml of 5.25% NaOCl solution. In group2 a final flush with 10 ml of 17% EDTA solution followed by 10ml of 5.25% NaOCl was used for smear layer removal. Each group then further divided in to two sub groups (n=15). After obturation specimens were kept in separate containers with wet gauze to maintain 100% humidity. The specimens were coated with nail polish except for apical 2mm. Specimens were then suspended vertically in two % methylene blue dye for 7 days. Longitudinal sectioning was done to determine the extent of dye penetration using a stereo microscope at X30 magnification. Student t test was used for statistical analysis (p≤ 0.05).Results:The results showed that in the presence of smear layer, mean apical dye leakage of AH Plus was2.89 mm and tg was 4.02 mm. While in the absence of smear layer the mean dye leakage of AH Plus was 2.23 mm and tg was 3.28 mm. Student t test was more than p value indicating non significant result for both sealers.Conclusion:Apical sealing ability of AH Plus is better than tg root canal sealer in the presence and absence of smear layer.

scholarly journals Comparison of Easydo Activator, Ultrasonic and Needle Irrigation Techniques on Sealer Penetration in Extracted Human Teeth

2022 ◽  
Author(s):  
Li Tan ◽  
Ying-Hui Zhou ◽  
Yao Feng ◽  
Qin Ye ◽  
Shao-Hui Zhang ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Root Apex ◽  
Laser Scanning Microscopy ◽  
Smear Layer ◽  
Confocal Laser ◽  
Human Teeth ◽  
Ah Plus ◽  
Ultrasonic Irrigation ◽  
Group 2 ◽  
Maximum Penetration

Abstract This study compared the effects of different irrigation systems on sealer penetration at the root apex. Forty-two single-rooted teeth were prepared and randomly divided into three groups (n = 14): group 1: needle irrigation (NI); group 2: passive ultrasonic irrigation (PUI); and group 3: Easydo Activator (EA). A solution of 3% sodium hypochlorite (NaOCl) was used for irrigation. Nine teeth in each group were filled with AH Plus sealer mixed with CY5 fluorescent dye and a single gutta-percha cone. The sealer penetration area, maximum penetration depth and percentage of sealer penetration at 5 mm and 1 mm from the apex were analyzed by confocal laser scanning microscopy (CLSM). The remaining 5 teeth in each group were subjected to test smear layer scores by scanning electron microscopy (SEM). The CLSM evaluation showed that increases in the area, depth and percentage of sealer penetration were detected at 1 mm and 5 mm from the root apex in the PUI group compared with the NI group, and greater increases were observed in the EA group (P < 0.05). The SEM experiment showed that the lowest scores for the smear layer and debris removal were achieved by the EA group when compared with the PUI and NI groups (P < 0.05). Our study supports EA was superior to PUI and NI regarding sealer penetration at the root apex during endodontic treatment, and it could provide a new technical idea for clinical root canal therapy.

scholarly journals Secondary Root Canal Treatment with Reciproc Blue and K-File: Radiographic and ESEM-EDX Analysis of Dentin and Root Canal Filling Remnants

2020 ◽  
Vol 9 (6) ◽  
pp. 1902 ◽  
Author(s):  
Carlo Prati ◽  
Fausto Zamparini ◽  
Andrea Spinelli ◽  
Gian Andrea Pelliccioni ◽  
Chiara Pirani ◽  
...  
Keyword(s):  
Trace Elements ◽  
Surface Area ◽  
Root Canal ◽  
Smear Layer ◽  
Root Canal Treatment ◽  
Filling Material ◽  
Secondary Root ◽  
Edx Analysis ◽  
Filling Materials ◽  
Ah Plus

Secondary root canal treatment requires the complete removal of filling materials with different chemical-physical properties. A newly developed single-use NiTi instrument (Reciproc Blue, RB) may be more effective in root canal retreatment. The aim of the present study was to evaluate morphology and composition of remnants after retreatment with RB compared to traditional K-File technique, in canals obturated with Thermafil/AH Plus. Twenty-four single-rooted human teeth were shaped with NiTi obturated with AH-Plus/Thermafil and retreated using RB NiTi instruments or manual K-Files. Radiographs were taken to evaluate endodontic space and radiopacity of residual filling-material before/after procedures. After retreatment, samples were longitudinally split and observed by environmental scanning electron microscopy connected to energy dispersive X-Ray spectroscopy (ESEM-EDX) to analyze the debris/remnant position, microchemistry, and dentinal surface morphology. Time for retreatments was recorded and compared using one-way ANOVA (p-value = 0.05). Radiopaque filling residuals were found in both groups. RB system resulted statistically faster than manual K-File in retreatment procedure (p < 0.001). Root canal space radiographic appearance obtained after retreatment with RB was wider than K-File (p < 0.05). ESEM-EDX revealed 4 different morphological dentin area. Area-1: debris-free with typical Ca, P, and N composition of dentin and detected in 70% of the surface. Area-2: presence of deproteinized smear layer free from N and debris in 15% of the surface. Area-3: a thick packed smear layer N-free and with fine debris consisting of trace elements from sealer in 10% of the surface. Area-4: packed with debris and trace elements. No difference was observed between both instruments regarding root canal space appearance and ESEM-EDX analysis. Both systems were able to remove filling material but created a dentine morphology composed of packed debris and filling materials embedded into the smear layer. Dentin surface composition resulted in collagen depleted by irrigation procedures. The reciprocating system required less time to complete retreatment.

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