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Omar N, Abdelraouf RM, Hamdy TM. Effect of different root canal irrigants on push-out bond strength of two novel root-end filling materials. BMC Oral Health 2023; 23:193. [PMID: 37009885 PMCID: PMC10068155 DOI: 10.1186/s12903-023-02858-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/06/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND The aim of this in vitro study was to evaluate push-out bond strength of different root-end filling materials using various irrigant solutions. METHODS A push-out bond strength test was performed to evaluate the bond strength of two experimental root-end filling materials: namely, nano-hybrid mineral trioxide aggregate (MTA) and polymethyl methacrylate (PMMA) cement filled with 20% weight nano hydroxyapatite (nHA) fillers compared to conventional MTA. The irrigant solutions employed were sodium hypochlorite (NaOCl) in concentrations 1%, 2.5% and 5.25% and 2% chlorhexidine gluconate (CHX) followed by application of 17% ethylene diamine tetra-acetic acid (EDTA). A freshly extracted sixty single-rooted human maxillary central incisors were used. The crowns were removed, the canal apex was widened to simulate immature teeth. Each type of irrigation protocols was performed. After application and setting of the root-end filling materials, a slice of one mm thickness was cut transversely from the apical end of each root. Specimens were stored for 1 month in artificial saliva and were subjected to a push-out test to evaluate the shear bond strength. Data were analyzed using two-way ANOVA and Tukey test. RESULTS The experimental nano-hybrid MTA showed the highest significant push-out bond strength values when irrigated by NaOCl at several concentrations (1%, 2.5% and 5.25%) (P< 0.05). Meanwhile, irrigation with 2% CHX resulted in highest bond strength values in nano-hybrid white MTA (18 MPa) and PMMA filled with 20% weight nHA (17.4 MPa) with nonsignificant difference between them (p = 0.25). In each root-end filling material, irrigation with 2% CHX led to the highest significant bond strength, followed by NaOCl 1%, while the least significant bond strength was produced after irrigation with NaOCl 2.5% and 5.25% (P< 0.05). CONCLUSION Considering the limitations of this study, it may be concluded that the application of 2% CXH and 17% EDTA provides superior push-out bond strength to root canal dentin compared with irrigation with NaOCl irrigants and 17% EDTA, experimental nano-hybrid MTA root-end filling material provides enhanced shear bond strength than conventional micron-sized MTA root-end filling material.
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Affiliation(s)
- Nada Omar
- Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), Giza, Dokki, 12622, Egypt
| | - Rasha M Abdelraouf
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo, 11553, Egypt
| | - Tamer M Hamdy
- Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), Giza, Dokki, 12622, Egypt.
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Roy D, Kataki R, Das L, Jain K. Influence of 2% chlorhexidine on the dislodgement resistance of AH plus, bioroot RCS, and GuttaFlow 2 sealer to dentin and sealer-dentin interface. J Conserv Dent 2022; 25:642-647. [PMID: 36591575 PMCID: PMC9795685 DOI: 10.4103/jcd.jcd_355_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/06/2022] [Accepted: 07/14/2022] [Indexed: 01/04/2023] Open
Abstract
Aim To find out the effects of 2% chlorhexidine (CHX) gel intracanal medicament on the dislodgement resistance of AH Plus, BioRoot RCS, and GuttaFlow 2 Sealer to dentin and on sealer-dentin interface. Materials and Methods Sixty single-rooted maxillary canine were taken and divided into two groups based on the treatment: Group 1 - control group (no medicament) (n = 30) and Group 2 - (GLUCO-CHeX 2% Gel) (n = 30). Further, the groups were divided according to the sealer used, namely (A) AH Plus sealer, (B) BioRoot RCS Sealer, and (c) Gutta Flow 2 sealer. Teeth were prepared using rotary instrumentation of file size 35 with a taper of 0.06 and obturation was done. 1 mm thick sections were obtained from the roots. All the sections were checked for push out bond strength using Universal testing machine and mode of failure using stereomicroscope. Some samples were evaluated for sealer-dentin interface using field emission scanning electron microscope. Results AH Plus showed higher bond strength compared to BioRoot RCS and GuttaFlow 2. There was no significant difference in the push out bond strength with or without the prior use of 2% CHX medicament (P > 0.05) and also CHX did not affect the mode of failure. However, sealer-dentin interface gap was increased with application of medicament. Conclusion Dislodgement resistance of AH Plus sealer is significantly higher than BioRoot RCS and GuttaFlow 2 sealer. The application of 2% CHX intracanal medicament before root canal obturation did not significantly affect the dislodgement resistance of the three tested sealers. 2% CHX medicament did not affect the failure mode of the sealers. Sealer-dentin interface is affected by the use of 2% CHX gel medicament.
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Affiliation(s)
- Debosmita Roy
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Rubi Kataki
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Lima Das
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Khushboo Jain
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
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What Are the Chances of Resilon to Dominate the Market Filling Materials for Endodontics? METALS 2021. [DOI: 10.3390/met11111744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This paper is a literature review with additional virtual analyses of the authors’ own experimental research results. Knowledge from various areas was synergistically combined, appropriately for concurrent engineering, presenting several possible methodological approaches used in research, optimizing the selection of engineering materials and the conditions of their application with particular application in endodontics. Particular attention was paid to the theoretical aspects of filling material strengths, weaknesses, opportunities, and threats SWOT analysis. Attention was paid to the original concepts of Sustainable Dentistry Development in conjunction with Dentistry 4.0, which includes endodontics as an important element. The dentists’ actions, among others, in conservative dentistry, along with endodontics, requires close cooperation with engineers and the enginering sciences. Methods of root canal preparation were described, together with selected tools, including those made of nitinol. Principles concerning the process of cleaning and shaping the pulp complex are presented. The importance of obturation methods, including the Thermo-Hydraulic-Condensation THC technique, and the selection of filling materials with the necessary sealants for the success of endodontic treatment are discussed. The experimental studies were carried out in vitro on human teeth removed for medical reasons, except for caries, for which two groups of 16 teeth were separated. After the root canal was prepared, it was filled with studs and pellets of a filling material based on polyester materials, which has gained the common trade name of resilon or, less frequently, RealSeal (SybronEndo) with an epiphany sealant. The teeth for the first group were obturated by cold lateral condensation. In the second case the obturation was performed using the Thermo-Hydraulic-Condensation technique using System B and Obtura III. The experimental leakage testing was done using a scanning electron microscope SEM and a light stereoscopic microscope LSM, as typical research tools used in materialography. The research results, in a confrontation with the data taken from the literature studies, do not indicate the domination of resilon in endodontics.
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Virtual Approach to the Comparative Analysis of Biomaterials Used in Endodontic Treatment. Processes (Basel) 2021. [DOI: 10.3390/pr9060926] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The importance of endodontics is presented within our own concept of Dentistry Sustainable Development (DSD) consisting of three inseparable elements; i.e., Advanced Interventionist Dentistry 4.0 (AID 4.0), Global Dental Prevention (GDP), and the Dentistry Safety System (DSS) as a polemic, with the hypothesis of the need to abandon interventionist dentistry in favour of the domination of dental prevention. In view of the numerous systemic complications of caries that affect 3−5 billion people globally, endodontic treatment effectively counteracts them. Regardless of this, the prevention of oral diseases should be developed very widely, and in many countries dental care should reach the poorest sections of society. The materials and methods of clinical management in endodontic procedures are characterized. The progress in the field of filling materials and techniques for the development and obturation of root canals is presented. The endodontics market is forecast to reach USD 2.1 billion in 2026, with a CAGR of 4.1%. The most widely used and recognized material for filling root canals is gutta-percha, recognized as the “gold standard”. An alternative is a synthetic thermoplastic filler material based on polyester materials, known mainly under the trade name Resilon. There are still sceptical opinions about the need to replace gutta-percha with this synthetic material, and many dentists still believe that this material cannot compete with gutta-percha. The results of studies carried out so far do not allow for the formulation of a substantively and ethically unambiguous view that gutta-percha should be replaced with another material. There is still insufficient clinical evidence to formulate firm opinions in this regard. In essence, materials and technologies used in endodontics do not differ from other groups of materials, which justifies using material engineering methodology for their research. Therefore, a detailed methodological approach is presented to objectify the assessment of endodontic treatment. Theoretical analysis was carried out using the methods of procedural benchmarking and comparative analysis with the use of contextual matrices to virtually optimize the selection of materials, techniques for the development and obturation of root canals, and methods for assessing the effectiveness of filling, which methods are usually used, e.g., in management science, and especially in foresight research as part of knowledge management. The results of these analyses are presented in the form of appropriate context matrices. The full usefulness of the research on the effectiveness and tightness of root canal filling using scanning electron microscopy is indicated. The analysis results are a practical application of the so-called “digital twins” approach concerning the virtual comparative analysis of biomaterials used in endodontic treatment.
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Dislodgement resistance and adhesive pattern of different endodontic sealers to dentine wall after artificial ageing: an in-vitro study. Odontology 2020; 109:149-156. [PMID: 32623538 DOI: 10.1007/s10266-020-00535-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 06/26/2020] [Indexed: 01/18/2023]
Abstract
To compare the dislodgement resistance and the adhesive pattern of four different endodontic sealers to root dentine walls. Ninety lower premolars were assigned to five groups (n = 18), Group 1: no sealer (control); Group 2: EndoRez (ERZ); Group 3: Sealapex (SPX); Group 4: EndoSeal MTA (ESA) and Group 5: BioRoot RCS (BRS). They were instrumented up to size 30 taper 0.06 and obturated using single cone technique with matched-taper gutta-percha cones and one of the mentioned sealers. Six teeth from each group were then randomly subjected to 100, 1000 and 10,000 thermocycles, respectively. 1 mm slice of mid root region, measuring 6 mm from the apical foramen was prepared and subjected to push-out test under a Universal Testing Machine. Adhesive patterns of sealers were assessed using a stereomicroscope at 20 × magnification and classified using a new system. Statistical analyses were performed using two-way ANOVA, complemented by Tukey HSD and Chi-square tests. ESA and BRS showed significantly higher (p < 0.05) push-out bond strength, followed by SPX, ERZ and lastly the control, but no significant difference was noted between ESA and BRS (p > 0.05) at 100, 1000 and 10,000 thermocycles, respectively. Both ESA and BRS exhibited a significant higher rate (p < 0.05) of Type 3 and Type 4 adhesive patterns as the thermocycles increased. ESA and BRS demonstrated higher bond strength and better adhesive pattern to root dentine wall than SPX and ERZ, especially after artificial ageing.
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Buldur B, Oznurhan F, Kaptan A. The effect of different chelating agents on the push-out bond strength of proroot mta and endosequence root repair material. Eur Oral Res 2019; 53:88-93. [PMID: 31309199 PMCID: PMC6614689 DOI: 10.26650/eor.20191618] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 10/25/2018] [Accepted: 11/28/2018] [Indexed: 11/20/2022] Open
Abstract
Purpose This study aimed to evaluate the effects of 17% ethylenediaminetetraacetic acid (EDTA), 7% maleic acid (MA), and 10% citric acid (CA) on the push-out bond strength of ProRooT MTA and Endosequence Root Repair Material (ERRM) putty. Materials and methods Eighty single-rooted extracted human teeth were instrumented to obtain a standardized immature teeth model. Based on the chelating agents tested, the specimens were randomly divided into three experimental groups: Group 1 (17% EDTA), Group 2 (7% MA), Group 3 (10% CA), and Group 4 (Positive Control) (n=20 for each group). Each group was further classified into two subgroups: Group A (ProRoot MTA) and Group B (Endosequence Root Repair Material (ERRM) putty) (n=10 for each subgroup). After irrigation and placement of cements, teeth were stored at 37°C and in 100% humidity for a week. A total of 240 dentine discs (three discs per teeth) were obtained and subjected to push-out assay. Data was analyzed using two-way analysis of variance and Tukey's post hoc t-test. Results Both types of chelating agent and calcium silicate-based cement were significantly associated with the push-out bond strength values. The push-out bond strength was significantly less for CA as compared to EDTA or MA. ERRM had higher bond strength values than ProRoot MTA (p<0.05). Conclusion The use of chelating agents increased the push-out bond strength of CSC. Regardless of tested chelating agents, ERRM had higher bond strength values than ProRoot MTA.
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Affiliation(s)
- Burak Buldur
- Sivas Cumhuriyet University, Faculty of Dentistry, Department of Pediatric Dentistry, Sivas,Turkey
| | - Fatih Oznurhan
- Sivas Cumhuriyet University, Faculty of Dentistry, Department of Pediatric Dentistry, Sivas,Turkey
| | - Arife Kaptan
- Sivas Cumhuriyet University, Faculty of Dentistry, Department of Pediatric Dentistry, Sivas,Turkey
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Ballal NV, Ulusoy Öİ, Chhaparwal S, Ginjupalli K. Effect of novel chelating agents on the push-out bond strength of calcium silicate cements to the simulated root-end cavities. Microsc Res Tech 2017; 81:214-219. [PMID: 29130556 DOI: 10.1002/jemt.22969] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/20/2017] [Accepted: 10/31/2017] [Indexed: 12/23/2022]
Abstract
To compare the effects of different chelating agents on the push-out bond strength of calcium silicate-based cements to the simulated root-end cavities. Root-end cavities were prepared on the roots of fifty extracted maxillary anterior teeth. The specimens were then randomly divided into 5 groups (n = 10) based on the final irrigation regimen: Group 1: 17% EDTA, Group 2: 7% maleic acid, Group 3: QMix, Group 4: 2.25% peracetic acid (PAA), Group 5: 0.9% saline. Then, the samples from each group were subdivided into two groups (n = 5) based on the apical filling material. In group 1, root-end cavities of all samples were filled with Biodentine and in group 2, with MTA. Each sample was horizontally sectioned to produce two discs of ∼1 mm thick per specimen. The maximum load required for the dislodgement of 100 retrofillings was recorded. The specimens were examined under scanning electron microscope after debonding to assess the type of bond failure. Data were statistically analyzed using Kruskal Wallis and Mann Whitney U tests. Irrigation with saline resulted in higher bond strength compared to the other irrigants in the retrograde cavities obturated with MTA or Biodentine (p < .05). In MTA group, there was no significant difference between the test irrigants (p > .05). EDTA and PAA groups showed higher dislodgement resistance values than the other test irrigants, when Biodentine was used as a filling. The type of irrigation solution influences the bond strength of the root-end fillings.
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Affiliation(s)
- Nidambur Vasudev Ballal
- Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal University, Karnataka, India
| | - Özgür İlke Ulusoy
- Department of Endodontics, Faculty of Dentistry, Gazi University, Emek, Ankara, Turkey
| | - Shubha Chhaparwal
- Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal University, Karnataka, India
| | - Kishore Ginjupalli
- Department of Dental Materials, Manipal College of Dental Sciences, Manipal University, Manipal, Karnataka, India
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De-Deus G, BrandÓo MC, Souza EM, Reis C, Reis K, Machado R, Neelakantan P. Epoxy Resin-Based Root Canal Sealer Penetration into Dentin Tubules Does not Improve Root Filling Dislodgement Resistance. Eur Endod J 2017; 2:1-5. [PMID: 33403329 PMCID: PMC7757946 DOI: 10.5152/eej.2017.16059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/14/2016] [Accepted: 12/29/2016] [Indexed: 11/22/2022] Open
Abstract
Objective: This study sought to evaluate the effect of the penetration of an epoxy resin-based root canal sealer into dentin tubules on the force required to dislodge the root canal filling. Methods: Sixty extracted human central incisors with single canals were decoronated, instrumented, and filled with gutta-percha and AH Plus sealer labeled with 0.1% rhodamine B dye. The roots were further sectioned horizontally at 3, 6, and 8 mm from the apex. The coronal surfaces of the resulting 180 slices were evaluated using confocal laser scanning microscopy to measure the amount of sealer that penetrated into the dentin tubules. To quantify the force required to dislocate the root filling material, the root fillings of the slices were subjected to a dislodgement resistance test (push-out). Spearman’s rho correlation test was further used to test the correlation between the push-out bond strength and sealer penetration into the dentin tubules (P<0.05). Results: No significant correlation was observed between sealer penetration into the dentin tubules and the force required to dislodge the root canal filling (P=0.626). Conclusion: Following the results of this study, the penetrating ability of the AH Plus sealer into dentin tubules has no correlation with the force required to dislodge the root canal filling.
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Affiliation(s)
- Gustavo De-Deus
- Department of Endodontics, Fluminense Federal University, Rio de Janeiro, Brazil
| | | | | | - Claudia Reis
- Department of Dental Clinic, Federal University of Espirito Santo, Espirito Santo, Brazil
| | - Kátia Reis
- Department of Prosthodontics and Dental Materials, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ricardo Machado
- Clinical Practice Limited to Endodontics, Navegantes, Brazil
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Pheenithicharoenkul S, Panichuttra A. Epigallocatechin-3-gallate increased the push out bond strength of an epoxy resin sealer to root dentin. Dent Mater J 2016; 35:888-892. [PMID: 27680035 DOI: 10.4012/dmj.2016-137] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to investigate the effect of epigallocatechin-3-gallate (EGCG) from green tea extract on the push out bond strength of an epoxy resin sealer to root dentin. Seventy single root canal premolars were decoronated and instrumented. The roots were randomly irrigated with different final irrigation protocols (n=16): 17%EDTA (EDTA), 17%EDTA followed by 2.5%NaOCl (EDTA+NaOCl), 17%EDTA followed by 1 mg/mL EGCG (EDTA+EGCG) and 1 mg/mL EGCG (EGCG). Other six root canals were received only 2.5%NaOCl as a control group. One root from each group (n=1) was excluded and prepared for SEM investigation. All root canals were then obturated and horizontally sectioned to perform the push out test. EDTA+EGCG group had the highest bond strength (p<0.05). EGCG group showed higher bond strength than EDTA group (p<0.05). The use of EGCG as a final irrigant significantly increased the push out bond strength of an epoxy resin sealer to root dentin.
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Franceschini K, Silva-Sousa YTC, Lopes FC, Pereira RD, Palma-Dibb RG, de Sousa-Neto MD. Bond strength of epoxy resin-based root canal sealer to human root dentin irradiated with Er,Cr:YSGG laser. Lasers Surg Med 2016; 48:985-994. [DOI: 10.1002/lsm.22496] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Keila de Almeida Franceschini
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | | | - Fabiane Carneiro Lopes
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Rodrigo Dantas Pereira
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Regina Guenka Palma-Dibb
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Manoel Damião de Sousa-Neto
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
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Deniz Sungur D, Purali N, Coşgun E, Calt S. Push-out bond strength and dentinal tubule penetration of different root canal sealers used with coated core materials. Restor Dent Endod 2016; 41:114-20. [PMID: 27200279 PMCID: PMC4868874 DOI: 10.5395/rde.2016.41.2.114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/01/2016] [Indexed: 11/11/2022] Open
Abstract
Objectives The aim of this study was to compare the push-out bond strength and dentinal tubule penetration of root canal sealers used with coated core materials and conventional gutta-percha. Materials and Methods A total of 72 single-rooted human mandibular incisors were instrumented with NiTi rotary files with irrigation of 2.5% NaOCl. The smear layer was removed with 17% ethylenediaminetetraacetic acid (EDTA). Specimens were assigned into four groups according to the obturation system: Group 1, EndoRez (Ultradent Product Inc.); Group 2, Activ GP (Brasseler); Group 3, SmartSeal (DFRP Ltd. Villa Farm); Group 4, AH 26 (Dentsply de Trey)/gutta-percha (GP). For push-out bond strength measurement, two horizontal slices were obtained from each specimen (n = 20). To compare dentinal tubule penetration, remaining 32 roots assigned to 4 groups as above were obturated with 0.1% Rhodamine B labeled sealers. One horizontal slice was obtained from the middle third of each specimen (n = 8) and scanned under confocal laser scanning electron microscope. Tubule penetration area, depth, and percentage were measured. Kruskall-Wallis test was used for statistical analysis. Results EndoRez showed significantly lower push-out bond strength than the others (p < 0.05). No significant difference was found amongst the groups in terms of percentage of sealer penetration. SmartSeal showed the least penetration than the others (p < 0.05). Conclusions The bond strength and sealer penetration of resin-and glass ionomer-based sealers used with coated core was not superior to resin-based sealer used with conventional GP. Dentinal tubule penetration has limited effect on bond strength. The use of conventional GP with sealer seems to be sufficient in terms of push-out bond strength.
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Affiliation(s)
- Derya Deniz Sungur
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Nuhan Purali
- Department of Biophysics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Erdal Coşgun
- Department of Biostatistics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Semra Calt
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Uzunoglu E, Turker SA, Karahan S. The Effect of Increased Temperatures of QMix and EDTA on the Push-out Bond Strength of an Epoxy-resin Based Sealer. J Clin Diagn Res 2015; 9:ZC98-ZC101. [PMID: 26393216 DOI: 10.7860/jcdr/2015/13402.6262] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 05/29/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND Bond strength of root canal sealers is mainly influenced by the surface tension of the root canal wall. Heat, or the use of a surfactant might reduce surface tension and it is known that surface tension of an EDTA solution significantly affected from temperature rise. QMix is a novel endodontic irrigant for smear layer removal containing EDTA, chlorhexidine and a detergent. There is no data regarding the influence of the temperature of the EDTA and QMix on the push-out bond strength of root canal sealers. AIM To evaluate effect of temperatures of QMix and EDTA on the bond-strength of AH Plus. MATERIALS AND METHODS Sixty premolars were prepared with ProTaper F4. During preparation 3% NaOCl was performed. Specimens were divided into 4 groups as follows: 5-mL 17% EDTA at 22°C and 37°C; 5-mL QMix at 22°C and 37°C. Three specimens from each group were prepared for observation using SEM. Remaining roots were obturated and prepared for a push-out test. Data was analysed using Anova and Bonferroni tests (p<0.05). RESULTS Samples irrigated with QMix had higher push-out bond strength values than those irrigated with EDTA (p=0.01), regardless of temperature. Samples irrigated with 37°C EDTA resulted in higher bond-strength values than those irrigated with 22°C EDTA (p<0.001). CONCLUSION Temperature of the final irrigant does affect the bond strength values of AH plus to root dentin irrigated with EDTA. Bond strength of AH Plus sealer to root canal dentin may improve with QMix.
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Affiliation(s)
- Emel Uzunoglu
- Research Assistant, Department of Endodontics, Hacettepe University Faculty of Dentistry , Ankara/ Turkey
| | - Sevinc Aktemur Turker
- Research Assistant, Department of Endodontics, Bülent Ecevit University Faculty of Dentistry , Zonguldak/ Turkey
| | - Sevilay Karahan
- Research Assistant, Department of Endodontics, Hacettepe University Faculty of Dentistry , Ankara/ Turkey
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Collares FM, Portella FF, Rodrigues SB, Celeste RK, Leitune VCB, Samuel SMW. The influence of methodological variables on the push-out resistance to dislodgement of root filling materials: a meta-regression analysis. Int Endod J 2015; 49:836-849. [DOI: 10.1111/iej.12539] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 08/26/2015] [Indexed: 12/30/2022]
Affiliation(s)
- F. M. Collares
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - F. F. Portella
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - S. B. Rodrigues
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - R. K. Celeste
- Preventive and Social Dentistry Department; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - V. C. B. Leitune
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - S. M. W. Samuel
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
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Oliveira DS, Cardoso ML, Queiroz TF, Silva EJNL, Souza EM, De-Deus G. Suboptimal push-out bond strengths of calcium silicate-based sealers. Int Endod J 2015; 49:796-801. [DOI: 10.1111/iej.12519] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 08/08/2015] [Indexed: 12/19/2022]
Affiliation(s)
- D. S. Oliveira
- Department of Endodontics; Federal Fluminense University (UFF); Niterói Brazil
| | - M. L. Cardoso
- Department of Endodontics; Federal Fluminense University (UFF); Niterói Brazil
| | - T. F. Queiroz
- Department of Endodontics; Federal Fluminense University (UFF); Niterói Brazil
| | - E. J. N. L. Silva
- Department of Endodontics; School of Dentistry; Grande Rio University (UNIGRANRIO); Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Endodontics; Federal University of Maranhão (UFMA); São Luís Brazil
| | - G. De-Deus
- Department of Endodontics; School of Dentistry; Grande Rio University (UNIGRANRIO); Rio de Janeiro Brazil
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15
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Fahmy SH, El Gendy AAH, El Ashry SH. Dentin wettability enhancement for three irrigating solutions and their effect on push out bond strength of gutta percha / AH Plus. J Clin Exp Dent 2015; 7:e237-42. [PMID: 26155339 PMCID: PMC4483330 DOI: 10.4317/jced.51865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 01/25/2015] [Indexed: 12/04/2022] Open
Abstract
Background The aim of this study was to investigate the effect of wettability enhancement for 17% EDTA, 2.5% sodium hypochlorite and 7% maleic acid solutions on push out bond strength of gutta percha /AH Plus to root dentin. Material and Methods One hundred and eight extracted single rooted human lower premolars were instrumented up to Protaper Universal F5 then irrigated with 3ml of 2.5% NaOCl after each file. Irrigants were prepared and a pilot study for determination of Tween 80 concentration yielding the lowest surface tension value in every solution was conducted. Samples were randomly divided into a control group and two experimental groups (17% EDTA and 7% Maleate), further split into eight subgroups (n=12), according to Tween 80 implementation sequence. Roots were obturated using gutta percha and AH plus by lateral condensation. Bond strength was measured by push out test. Mode of failure was then evaluated quantitatively by stereomicroscopy. Data were statistically analyzed using one way ANOVA followed by Tukey-Kramer for multiple comparisons. Results Control group showed the lowest values. Maleic acid subgroups showed significantly higher overall values than EDTA subgroups (P<0.05). Protocols implementing surfactant containing NaOCl showed significantly lower values than plain counterparts. Failure pattern was predominantly cohesive for plain regimens and the ones implementing Tween 80 in maleic acid solutions with plain NaOCl. Conclusions Tween 80 addition to demineralizing irrigants increased the bond strength values. Surfactant containing NaOCl solutions yielded lower bond strength than plain ones. Key words:Wettability enhancement for three irrigants vs. corresponding gutta percha/AH Plus bonding.
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Affiliation(s)
- Sarah-Hossam Fahmy
- Assistant Lecturer at the Endodontic Department, Faculty of Dentistry, Ain Shams University
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Hoppe CB, Scarparo RK, Böttcher DE, Leitune VCB, Collares FM, Samuel SMW, Grecca FS. Thermocompaction decreases long-term push-out bond strength of methacrylate-based sealers. Acta Odontol Scand 2015; 73:292-7. [PMID: 25623918 DOI: 10.3109/00016357.2014.942875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the immediate and long-term bond strengths to root dentin of Epiphany/Resilon and AH Plus/gutta-percha fillings, after using either lateral condensation or Tagger's hybrid thermomechanical compaction techniques. MATERIALS AND METHODS Eighty human single-rooted teeth were used. The root canals were prepared by means of hand crown-down technique up to a #45 K-file and irrigation with 1% sodium hypochlorite was performed. Samples were randomly divided into eight (n=10) experimental groups divided according to filling material (gutta-percha/AH Plus and Resilon/Epiphany), obturation technique (Lateral compaction and Tagger's hybrid thermomechanical compaction) and storage time (24 h and 6 months). During storage, the samples were kept at 37°C and 100% humidity. After the two experimental periods, each root was sectioned perpendicular to its long axis into three serial slices and push-out tests were carried out using a universal testing machine. Statistical significant differences were set by ANOVA and Tuckey post-hoc (p<0.05). RESULTS Using thermocompaction technique, the samples filled with Epiphany/Resilon decreased significantly the bond strength after a 6 months storage-period (p<0.05) and the ones filled with AH Plus/gutta-percha presented a tendency to lower values of the push-out test, although not statistically significant. For both materials, dentin bond strength of the specimens filled by means of lateral condensation remained stable throughout the experimental periods. CONCLUSION Under the limitations of the current study, it can be concluded that the thermocompaction technique and the storage time can influence push-out bond strength when used with methacrylate-based sealers.
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Affiliation(s)
- Carolina Bender Hoppe
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, UFRGS , Porto Alegre , Brazil
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Mohammadi Z, Jafarzadeh H, Shalavi S, Bhandi S, Kinoshita JI. Resilon: Review of a New Material for Obturation of the Canal. J Contemp Dent Pract 2015; 16:407-14. [PMID: 26162262 DOI: 10.5005/jp-journals-10024-1698] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Resilon is a thermoplastic synthetic polymer-based endodontic material alternative to gutta-percha. It contains bioactive glass and also radiopaque fillers. It has the same handling properties as gutta-percha. For endodontic retreatment, it may be dissolved with some solvents, such as chloroform or softened with heat. The composition of Resilon and its sealer (Epiphany) bond to dentin and form a monoblock. A review of the literature and a discussion of its properties comparing to other root canal filling materials are presented.
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Affiliation(s)
- Zahed Mohammadi
- Department of Endodontics, Iranian Center for Endodontic Research (ICER), Research Institute of Dental Sciences Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Jafarzadeh
- Associate Professor, Faculty of Dentistry and Dental Research Center Vakilabad Blvd, Mashhad, Iran, PO Box: 91735-984, Phone: +98-51-38829501, Fax: +98-51-38829500, e-mail:
| | | | - Shilpa Bhandi
- Department of Conservative Dentistry and Endodontics Faculty of Dental Sciences, MS Ramajah University of Applied Sciences, Bengaluru, Karnataka, India
| | - Jun-Ichiro Kinoshita
- Department of Conservative Dentistry, Showa University Dental Hospital, Tokyo, Japan
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18
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The Effect of Medicaments Used in Endodontic Regeneration Technique on the Dislocation Resistance of Mineral Trioxide Aggregate to Root Canal Dentin. J Endod 2014; 40:2041-4. [DOI: 10.1016/j.joen.2014.08.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 08/08/2014] [Accepted: 08/22/2014] [Indexed: 11/22/2022]
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Machado R, Silva Neto UXD, Carneiro E, Fariniuk LF, Westphalen VPD, Cunha RS. Lack of correlation between tubular dentine cement penetration, adhesiveness and leakage in roots filled with gutta percha and an endodontic cement based on epoxy amine resin. J Appl Oral Sci 2014; 22:22-8. [PMID: 24626245 PMCID: PMC3908761 DOI: 10.1590/1678-775720130247] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 10/28/2013] [Indexed: 11/22/2022] Open
Abstract
Objective To analyze possible correlations among tubular dentine cement penetration,
adhesiveness and apical leakage in fillings performed with gutta percha and an
endodontic cement based on epoxy amine resin. Material and Methods Sixty similar, extracted human mandibular central incisors were irrigated,
instrumented and filled following the same protocol. First, apical leakage was
quantified by fluid filtration tests. Then, these same specimens were sectioned
for analysis of tubular dentine cement penetration and the middle thirds were
submitted to push-out tests to analyze the adhesiveness of the fillings. Results In brief, the means and standard deviations with a confidence interval of 95% were
as follows: tubular dentine cement penetration (8.875±4.540), adhesiveness
(4.441±2.683) and apical leakage (0.318±0.215). The data were confronted using the
Pearson's test (P>0.05), and it was possible to prove that there was no
correlation between (1) tubular dentine cement penetration and apical leakage
(r2: 0.08276), (2) tubular dentine cement penetration and
adhesiveness (r2: -0.2412) and (3) adhesiveness and apical leakage
(r2: 0.1340). Conclusion After analysis of these data, it could be observed that there exists no
correlation among the variables analyzed in this study.
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Affiliation(s)
- Ricardo Machado
- Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
| | - Ulisses Xavier da Silva Neto
- Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
| | - Everdan Carneiro
- Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
| | - Luiz Fernando Fariniuk
- Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
| | - Vânia Portela Ditzel Westphalen
- Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil
| | - Rodrigo Sanches Cunha
- University of Manitoba, School of Dentistry, Restorative Dentistry, Winnipeg, Canada, School of Dentistry, Restorative Dentistry, University of Manitoba, Winnipeg, Canada
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Topçuoğlu HS, Demirbuga S, Tuncay Ö, Arslan H, Kesim B, Yaşa B. The bond strength of endodontic sealers to root dentine exposed to different gutta-percha solvents. Int Endod J 2014; 47:1100-6. [DOI: 10.1111/iej.12257] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 01/27/2014] [Indexed: 11/27/2022]
Affiliation(s)
- H. S. Topçuoğlu
- Department of Endodontics; Faculty of Dentistry; Erciyes University; Kayseri Turkey
| | - S. Demirbuga
- Department of Restorative Dentistry; Faculty of Dentistry; Erciyes University; Kayseri Turkey
| | - Ö. Tuncay
- Department of Endodontics; Faculty of Dentistry; Erciyes University; Kayseri Turkey
| | - H. Arslan
- Department of Endodontics; Faculty of Dentistry; Katip Çelebi University; Izmir Turkey
| | - B. Kesim
- Department of Endodontics; Faculty of Dentistry; Erciyes University; Kayseri Turkey
| | - B. Yaşa
- Department of Restorative Dentistry; Faculty of Dentistry; Katip Çelebi University; Izmir Turkey
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21
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Lotfi M, Ghasemi N, Rahimi S, Vosoughhosseini S, Saghiri MA, Shahidi A. Resilon: a comprehensive literature review. J Dent Res Dent Clin Dent Prospects 2013; 7:119-30. [PMID: 24082982 PMCID: PMC3779370 DOI: 10.5681/joddd.2013.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 03/23/2013] [Indexed: 11/17/2022] Open
Abstract
Background and aims. An ideal root canal filling material should completely seal the entire root canal space and block communication between the root canal system and its surrounding tissues; it should also be nontoxic, noncarcinogenic, non-genotoxic, biocompatible, insoluble in tissue fluids and dimensionally stable. Bonding to dentin is a promising property, which can prevent leakage and improve the sealing ability of root canal filling materials. Resilon was developed and rec-ommended initially because the existing rootcanal filling materials did not bond to root canal dentin. Since its introduction in 2004, numerous reports have been published regarding various aspects of this material. The aim of this literature review is to present investigations regarding Resilon's physical and chemical properties and leakage studies. Materials and methods. A review of the literature was performed by using electronic and hand searching methods for Resilon from May 2004 to April 2012. Results. There are many published reports regarding Resilon. The searchshowed that Resilon is composed of a parent polymer, polycaprolactone or Tone, which is a biodegradable aliphatic polyester, with filler particles consisting of bioactive glass, bismuth oxychloride and barium sulfate. It possesses some antibacterial and antifungal properties. It is a promising material for root canal filling. Despite the presence of numerous case reports and case series regarding these applications, there are few designed research studies on clinical applications of this material. Resilon has some drawbacks such as high cost. Conclusion. Resilon seals well and is a biocompatible material. However, more clinical studies are needed to confirm its efficacy compared with other materials.
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Affiliation(s)
- Mehrdad Lotfi
- Professor, Department of Endodontic, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Negin Ghasemi
- Postgraduate Student, Department of Endodontic, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Rahimi
- Professor, Department of Endodontic, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
- Dental and Periodontal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Vosoughhosseini
- Associate Professor, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Ali Saghiri
- Research Associated, Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public health, Madison, WI, USA
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Bodrumlu E, Avsar A, Hazar Bodrumlu E, Cicek E. The effects of calcium hydroxide removal methods on bond strength of Epiphany SE with two irrigation protocols. Acta Odontol Scand 2013; 71:989-93. [PMID: 23167907 DOI: 10.3109/00016357.2012.741698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The purpose of this study was to compare the effects of five calcium hydroxide removal methods on the bond strength of Epiphany SE sealer after canal irrigation with NaOCl+EDTA or NaOCl+MTAD. MATERIALS AND METHODS The 120 roots were instrumented by using the ProTaper rotary system under irrigation with 2.5% sodium hypochlorite and randomly divided into two major groups according to the final irrigation: 1.3% NaOCl + MTAD and 5% NaOCl + 17% EDTA. For controls, 10 roots from each of the final irrigations with NaOCl + MTAD and NaOCl + EDTA (20 roots) were not filled with Ca(OH)2. The intra-canal paste, Ca(OH)2 was applied to each of the 100 remaining roots and stored at 37°C for 7 days. Each group was sub-divided into five sub-groups (n = 10) according to the removal technique for the intra-canal dressing: Group-1: recapitulation with size 30 K file + 3 ml of saline solution, Group-2: recapitulation with size 30 K file + 3 ml of 5% NaOCl, Group-3: using 5% NaOCl + 17% EDTA, Group-4: using 5%NaOCl + 15% citric acid, and Group-5: using 1.3% NaOCl + 5 ml MTAD. The root canals were filled with Resilon and Epiphany SE sealer. The bond strength was measured. RESULTS The mean bond strength of Epiphany SE to root dentine irrigated with NaOCl + MTAD was lower than that of NaOCl + EDTA. The highest bond strengths were 3.31 ± 0.057 and 2.60 ± 0.054 in the NaOCl + citric acid group when Ca(OH)2 was applied to roots treated with NaOCl + EDTA and NaOCl + MTAD, respectively (p < 0.05). CONCLUSION For root canals treated with NaOCl + EDTA or NaOCl + MTAD, the use of NaOCl + chelating agent for Ca(OH)2 removal does not adversely affect the bond strength of Epiphany SE to dentin.
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Affiliation(s)
- E Bodrumlu
- Endodontics Department, Ondokuz Mayis University. Samsun, Turkey.
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23
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Self-Adjusting File Cleaning-Shaping-Irrigation System Improves Root-filling Bond Strength. J Endod 2013; 39:254-7. [DOI: 10.1016/j.joen.2012.10.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 10/10/2012] [Accepted: 10/18/2012] [Indexed: 11/20/2022]
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Souza SDFC, Francci C, Bombana AC, Kenshima S, Barroso LP, D'Agostino LZ, Loguercio AD. Qualitative SEM/EDS analysis of microleakage and apical gap formation of adhesive root-filling materials. J Appl Oral Sci 2013; 20:329-34. [PMID: 22858699 PMCID: PMC3881782 DOI: 10.1590/s1678-77572012000300006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Accepted: 09/15/2011] [Indexed: 11/24/2022] Open
Abstract
Objective The aim of this study was to compare the correspondence between gap formation and
apical microleakage in root canals filled with epoxy resin-based (AH Plus)
combined or not with resinous primer or with a dimethacrylate-based root canal
sealer (Epiphany). Material and Methods Thirty-nine lower single-rooted human premolars were filled by the lateral
condensation technique (LC) and immersed in a 50-wt% aqueous silver nitrate
solution at 37ºC (24 h). After longitudinal sectioning, epoxy resin
replicas were made from the tooth specimens. Both the replicas and the specimens
were prepared for scanning electron microscopy (SEM). The gaps were observed in
the replicas. Apical microleakage was detected in the specimens by SEM/energy
dispersive spectroscopy (SEM/EDS). The data were analyzed statistically using an
Ordinal Logistic Regression model and Analysis of Correspondence (α=0.05).
Results Epiphany presented more regions containing gaps between dentin and sealer
(p<0.05). There was correspondence between the presence of gaps and
microleakage (p<0.05). Microleakage was similar among the root-filling
materials (p>0.05). Conclusions The resinous primer did not improve the sealing ability of AH Plus sealer and the
presence of gaps had an effect on apical microleakage for all materials.
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Chadha R, Taneja S, Kumar M, Gupta S. An in vitro comparative evaluation of depth of tubular penetration of three resin-based root canal sealers. J Conserv Dent 2012; 15:18-21. [PMID: 22368329 PMCID: PMC3284005 DOI: 10.4103/0972-0707.92600] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 10/15/2011] [Accepted: 11/08/2011] [Indexed: 12/03/2022] Open
Abstract
Objective: To evaluate the depth of penetration of three resin-based root canal sealers into the dentinal tubules at the cervical, middle and apical third of the root canal. Materials and Methods: Root canals of 32 extracted human mandibular premolar teeth were prepared and obturated using EndoREZ + resin-coated gutta-percha points (group A), Epiphany + Resilon points (group B), or AH Plus + gutta-percha (group C). The teeth were split longitudinally in bucco-lingual direction and viewed under scanning electron microscope. Photographs were taken at cervical, middle and apical levels for all samples and corresponding measurements were made. The data obtained was statistically analyzed using one-way ANOVA and the post-hoc Bonferroni test for inter-group comparison. Results: The results showed that the greatest penetration into dentinal tubules was by EndoREZ sealer (525.2 μ, 327.802 μ and 198.36 μ at cervical, middle and apical third), followed by Epiphany sealer (479.7 μ, 297.212 μ, and 182.22 μ), and the least penetration was seen with AH Plus sealer (224.2 μ, 65.419 μ, and 40.7 μ). The penetration of sealer into the dentinal tubules was statistically significant between each group at each level and between different levels within each group (P<.05). Conclusion: The penetration depth of EndoREZ and Epiphany into the dentinal tubules is significantly greater than that of AH Plus.
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Affiliation(s)
- Rupali Chadha
- Department of Conservative Dentistry and Endodontics, I.T.S. Centre for Dental Studies and Research, Muradnagar, Ghaziabad, Uttar Pradesh, India
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Elsaka S, Elnaghy A. Effect of addition of chitosan to self-etching primer: antibacterial activity and push-out bond strength to radicular dentin. J Biomed Res 2012; 26:288-94. [PMID: 23554762 PMCID: PMC3596746 DOI: 10.7555/jbr.26.20120042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 04/30/2012] [Accepted: 06/20/2012] [Indexed: 11/19/2022] Open
Abstract
The purpose of this study was to evaluate the antibacterial activity of a modified self-etching primer incorporating chitosan and whether this modification affected the bond strength to radicular dentin. A modified self-etching primer was prepared by adding chitosan solutions at 0.03%, 0.06%, 0.12% and 0.25% (W/W) to RealSeal selfe-tching primer. RealSeal primer without chitosan was used as the control. The antibacterial activity of the modified self-etching primer was evaluated using the direct contact test against Enterococcus faecalis. The bonding ability of the RealSeal system to radicular dentin was evaluated using the push-out bond strength test. The modes of failure were examined under a stereomicroscope. Data were analyzed using analysis of variance (ANOVA) and Tukey's test, with a P-value < 0.05 indicating statistical significance. The results showed that the antibacterial properties of the freshly prepared and aged modified self-etching primer incorporating chitosan exhibited potent antibacterial effect against Enterococcus faecalis compared with the unmodified primer. The RealSeal system with the aged modified self-etching primer incorporating chitosan showed no significant differences in the bond strength as compared with the control (P = 0.99). The findings suggest that modified self-etching primer incorporating chitosan is a promising antibacterial primer which does not adversely affect the bond strength of the RealSeal system to radicular dentin.
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Affiliation(s)
- Shaymaa Elsaka
- Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, PC 35516, Egypt
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27
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Canoglu E, Gulsahi K, Sahin C, Altundasar E, Cehreli ZC. Effect of bleaching agents on sealing properties of different intraorifice barriers and root filling materials. Med Oral Patol Oral Cir Bucal 2012; 17:e710-5. [PMID: 22322509 PMCID: PMC3476038 DOI: 10.4317/medoral.17751] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 09/14/2011] [Indexed: 11/24/2022] Open
Abstract
Objective: To evaluate the effect of intracoronal bleaching agents on the sealing properties of different intraorifice barriers and root filling materials.
Study Design: The root canals of extracted human premolars (n=180) were prepared by using System GT rotary files and filled with either gutta-percha+AH Plus or Resilon+Epiphany sealer. In both groups, the coronal 3mm of root filling was removed and replaced with one of the following materials applied as intraorifice barriers (n=30/group): 1. ProProot-MTA; 2. Conventional Glass ionomer cement; and 3. Hybrid resin composite. In each subgroup, intracoronal bleaching was performed using either sodium perborate with distilled water or 35% hydrogen peroxide gel for 3 weeks. The leakage of specimens was measured using fluid-filtration and dye penetration tests. The data were analyzed statistically with One-way ANOVA, Repeated Measures t-test and Independent Samples t-test (p=0.05).
Results: The fluid conductance values of the test groups were not influenced by the type of the bleaching agent, the intraorifice barrier, or the root filling material (all p>0.05). However, the extent of dye leakage was significantly affected by the type of intraorifice barrier material (p<0.05), which showed the following statistical ranking: glass ionomer cement > resin composite > ProRoot-MTA (p<0.05).
Conclusions: The effect of 35% hydrogen peroxide gel or sodium perborate/distilled water on the sealing properties of tested intraorifice barriers and root filling materials varied conforming leakage assessment. These properties were not affected by using fluid filtration test, while the glass ionomer barrier showed the greatest amount of dye leakage in both gutta-percha and Resilon root-filled teeth.
Key words:Tooth Bleaching, root canal filling materials, glass ionomer cement, mineral trioxide aggregate, micro leakage
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Affiliation(s)
- Ebru Canoglu
- Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Neelakantan P, Varughese AA, Sharma S, Subbarao CV, Zehnder M, De-Deus G. Continuous chelation irrigation improves the adhesion of epoxy resin-based root canal sealer to root dentine. Int Endod J 2012; 45:1097-102. [DOI: 10.1111/j.1365-2591.2012.02073.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Elsaka SE, Elnaghy AM. Antibacterial activity of calcium hydroxide combined with chitosan solutions and the outcomes on the bond strength of RealSeal sealer to radicular dentin. J Biomed Res 2012; 26:193-9. [PMID: 23554749 PMCID: PMC3596069 DOI: 10.7555/jbr.26.20110136] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 01/15/2012] [Accepted: 03/26/2012] [Indexed: 11/20/2022] Open
Abstract
The purpose of this study was to investigate the antibacterial activity of calcium hydroxide [Ca(OH)2] combined with chitosan solutions against Enterococcus faecalis-infected root canal dentin and the effect of this new intracanal medicament on the bond strength of RealSeal sealer to radicular dentin. An experimental intracanal medicament was prepared by mixing different concentrations of chitosan solution (25%, 50%, and 100%, W/V) to Ca(OH)2 powder. Antibacterial activity was evaluated and the total numbers of colony forming units were determined. Bonding ability of RealSeal sealer to radicular dentin was evaluated using push-out bond strength test. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey's multiple comparison tests. We found that Ca(OH)2 combined with different concentrations of chitosan solutions showed better antibacterial activity than Ca(OH)2 mixed with saline, without significantly affecting the bond strength of RealSeal sealer to radicular dentin (P > 0.05). The findings suggest that Ca(OH)2 combined with chitosan is a promising intracanal medicament and may be effective in endodontic therapy.
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Affiliation(s)
- Shaymaa Elsayed Elsaka
- Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, PC 35516, Egypt
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Marques de Melo R, Bottino MA, Galvão RKH, Soboyejo WO. Bond strengths, degree of conversion of the cement and molecular structure of the adhesive-dentine joint in fibre post restorations. J Dent 2012; 40:286-94. [PMID: 22306531 DOI: 10.1016/j.jdent.2012.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 12/28/2011] [Accepted: 01/02/2012] [Indexed: 10/14/2022] Open
Abstract
OBJECTIVES Because fibre post restorations are influenced by multiple factors such as the types of bonding materials, the dentine region and the time under moist exposure, this study sought to determine the bond strength of endodontic restorations and its relation to the degree of conversion of the cement layer and the molecular structure of the dentine-bonded joints. METHODS The performance of 2 etch-and-rinse (All-Bond 2 and One-Step Plus) and 2 self-etch (Clearfil SE Bond and Xeno III) adhesives at post spaces regions, after 7 d or 4 m, was evaluated. FRC Postec Plus posts were cemented to the root canal with a dual-cure resin cement (Duo-Link). Transverse sections of the tooth were subjected to push-out testing, to degree-of-conversion measurements and to hybrid layer evaluation through μ-Raman spectroscopy. RESULTS Coronal bonding was higher than cervical and middle bonding. The hybrid layer was thicker for the etch-and-rinse systems, with thicknesses decreasing towards the middle region. The degree of conversion measured for the 3-step etch-and-rinse group after 4 m was significantly higher than that for the self-etching groups. CONCLUSIONS Although not totally stable at the adhesive-dentine interface, the 3-step etch-and-rinse adhesive in the coronal dentine provided the best bond strength, degree of conversion of the cement and hybrid layer thickness in post restorations, in both short- and long-term analyses.
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Affiliation(s)
- Renata Marques de Melo
- Department of Dental Materials and Prosthodontics, São Paulo State University, São José dos Campos, São Paulo, Brazil.
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New endodontic obturation systems and their interfacial bond strength with intraradicular dentine - ex vivo studies. Adv Med Sci 2011; 56:327-33. [PMID: 21940263 DOI: 10.2478/v10039-011-0031-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE To comparatively evaluate adhesive properties of selected root canal fillings through the measurement of the material-dentine interfacial bond strength. MATERIAL AND METHODS Fifty extracted single-rooted human teeth with one canal each were prepared using Hero instruments to size 30.04. Teeth were divided into four subgroups depending on the root canal filling material and the method of obturation: Resilon/Epiphany - a thermoplastic method (IA), Resilon/Epiphany - a matching single-point method (IB), gutta-percha/Roeko Seal Automix - a thermoplastic method (IIA) and gutta-percha/Roeko Seal Automix - a matching single-point method (IIB). The obturated roots were cut perpendicular to the long axis to create 1.7 mm thick slices. The bond strength was measured for each test slice with push -out testing machine. RESULTS The highest push-out bond strength was registered in subgroup IB (3.98 ± 1.33 MPa). Significantly lower bond strength was observed in subgroups IA (0.50 ± 0.24 MPa), IIA (0.33 ± 0.18 MPa) and IIB (0.08 ± 0.03 MPa) (p<0.001). No statistically significant differences in material-dentine interfacial bond strength values were observed between IA and IIA, IA and IIB, IIA and IIB subgroups (p > 0.05). CONCLUSIONS The push-out bond strength of the material-dentine interface was dependent on the type of material used and the root canal filling technique. The R/E system exhibited better adhesion ability to intraradicular dentine than G/RSA. The highest bond strength was observed for Resilon/Epiphany introduced with the single-cone technique.
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Khan AS, Hassan KR, Bukhari SF, Wong FSL, Rehman IU. Structural and in vitro adhesion analysis of a novel covalently coupled bioactive composite. J Biomed Mater Res B Appl Biomater 2011; 100:239-48. [DOI: 10.1002/jbm.b.31945] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Revised: 06/15/2011] [Accepted: 07/05/2011] [Indexed: 11/07/2022]
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Nagas E, Uyanik MO, Eymirli A, Cehreli ZC, Vallittu PK, Lassila LVJ, Durmaz V. Dentin moisture conditions affect the adhesion of root canal sealers. J Endod 2011; 38:240-4. [PMID: 22244645 DOI: 10.1016/j.joen.2011.09.027] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 09/27/2011] [Accepted: 09/30/2011] [Indexed: 10/15/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate the effects of intraradicular moisture conditions on the push-out bond strength of root canal sealers. METHODS Eighty root canals were prepared using rotary instruments and, thereafter, were assigned to 4 groups with respect to the moisture condition tested: (1) ethanol (dry): excess distilled water was removed with paper points followed by dehydration with 95% ethanol, (2) paper points: the canals were blot dried with paper points with the last one appearing dry, (3) moist: the canals were dried with low vacuum by using a Luer adapter for 5 seconds followed by 1 paper point for 1 second, and (4) wet: the canals remained totally flooded. The roots were further divided into 4 subgroups according to the sealer used: (1) AH Plus (Dentsply-Tulsa Dental, Tulsa, OK), (2) iRoot SP (Innovative BioCeramix Inc, Vancouver, Canada), (3) MTA Fillapex (Angelus Indústria de Produtos Odontológicos S/A, Londrina, Brasil), and (4) Epiphany (Pentron Clinical Technologies, Wallingford, CT). Five 1-mm-thick slices were obtained from each root sample (n = 25 slices/group). Bond strengths of the test materials to root canal dentin were measured using a push-out test setup at a cross-head speed of 1 mm/min. The data were analyzed statistically by two-way analysis of variance and Tukey tests at P = .05. RESULTS Irrespective of the moisture conditions, iRoot SP displayed the highest bond strength to root dentin. Statistical ranking of bond strength values was as follows: iRoot SP > AH Plus > Epiphany ≥ MTA Fillapex. The sealers displayed their highest and lowest bond strengths under moist (3) and wet (4) conditions, respectively. CONCLUSIONS The degree of residual moisture significantly affects the adhesion of root canal sealers to radicular dentin. For the tested sealers, it may be advantageous to leave canals slightly moist before filling.
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Affiliation(s)
- Emre Nagas
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
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Neelakantan P, Subbarao C, Subbarao CV, De-Deus G, Zehnder M. The impact of root dentine conditioning on sealing ability and push-out bond strength of an epoxy resin root canal sealer. Int Endod J 2011; 44:491-8. [DOI: 10.1111/j.1365-2591.2010.01848.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Attam K, Talwar S. A laboratory comparison of apical leakage between immediate versus delayed post space preparation in root canals filled with Resilon. Int Endod J 2010; 43:775-81. [PMID: 20609025 DOI: 10.1111/j.1365-2591.2010.01742.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AIM To analyse ex vivo the integrity of the apical seal of Resilon root fillings following immediate post space preparation or after 1 week when leaving either 5 mm or 3 mm of remaining filling material. METHODOLOGY One hundred and fifty freshly extracted mandibular premolar teeth with single, straight root canals were used. Teeth were autoclaved and cleaned of debris and soft tissue. After decoronation at 16 mm length, the root canals were instrumented using the K3 rotary system to apical file size 45, 0.04 taper with intermittent irrigation using 1% sodium hypochlorite. The teeth were randomly divided into five groups with 30 teeth in each group. Group 1: control group in which the root canals were not filled. Group 2: the canals were filled with Resilon and a post space prepared immediately leaving 5 mm of apical filling. Group 3: the canals were filled and post space preparation delayed for 1 week leaving 5 mm of material apically. Group 4: post space preparation in the canals was initiated immediately after filling leaving 3 mm of material apically. Group 5: the root canals were filled and post space preparation was delayed for 1 week leaving 3 mm of material apically. Microleakage was evaluated using a fluid transport device. The results were analysed statistically using one-way anova followed by Bonferroni's post hoc test. P < 0.05 was considered as statistically significant. RESULTS There was a highly significant difference amongst the groups (P < 0.001). The maximum mean leakage was observed in group 5 (141.63 x 10(-6) microL min(-1) cm(-1)) and the least microleakage in group 2 (99.87 x 10(-6) microL min(-1) cm(-1)). CONCLUSION Immediate post space preparation was associated with less microleakage than delayed preparation when both 5 mm and 3 mm of apical filling remained. Leaving 5 mm of Resilon provided a significantly better seal compared to leaving 3 mm of material.
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Affiliation(s)
- K Attam
- Department of Conservative Dentistry & Endodontics, Maulana Azad Institute of Dental Sciences, Bahadur Shah Zafar Marg, New Delhi, India.
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Souza SFC, Bombana AC, Francci C, Gonçalves F, Castellan C, Braga RR. Polymerization stress, flow and dentine bond strength of two resin-based root canal sealers. Int Endod J 2009; 42:867-73. [DOI: 10.1111/j.1365-2591.2009.01581.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gorduysus O, Nagas E, Cehreli ZC, Gorduysus M, Yilmaz Z. Localization of root canal orifices in mandibular second molars in relation to occlusal dimension. Int Endod J 2009; 42:973-7. [PMID: 19619227 DOI: 10.1111/j.1365-2591.2009.01596.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM To evaluate the localization and distribution of canal orifices of mandibular second molar teeth in relation to the mesio-distal and bucco-lingual dimensions of coronal tissue. METHODOLOGY Fifty extracted mandibular second molar teeth were embedded into plaster blocks with their vertical axes aligned perpendicular to the horizontal plane. The teeth were photographed digitally from the occlusal aspect under 12 x magnification. Thereafter, the occlusal halves of crowns were sectioned off to expose the root canal orifices. The teeth were than photographed under the same magnification, after which the pre- and post-sectioning images of each specimen were stacked into a single file. To plot the coordinate of each canal orifice, a 0.5-mm grid analytical plane was mounted digitally on the stack so that the x- and y-axes of the plane were superimposed on the mesiodistal and buccolingual axes (bisectors) of the tooth crowns. Localization and distribution of the coordinates of the canal orifices were evaluated using the chi-square test (P = 0.05). RESULTS Only one tooth displayed a single root canal orifice, located in the mesiobuccal-distolingual 'centre' of the occlusal surface. The majority of mandibular second molars had three orifices (72%), followed by those with two (16%) and four (10%). The distal canal was located lingual to the centre of the occlusal plane. CONCLUSION The distal canal was located lingual to the centre of the occlusal plane of mandibular second molars. The possibility of observing more divergent localizations and orifice numbers should not be overlooked in clinical practice.
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Affiliation(s)
- O Gorduysus
- Department of Endodontics Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Push-out bond strength and SEM evaluation of new polymeric root canal fillings. ACTA ACUST UNITED AC 2009; 107:879-85. [DOI: 10.1016/j.tripleo.2009.01.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2008] [Revised: 12/21/2008] [Accepted: 01/12/2009] [Indexed: 11/24/2022]
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Huffman BP, Mai S, Pinna L, Weller RN, Primus CM, Gutmann JL, Pashley DH, Tay FR. Dislocation resistance of ProRoot Endo Sealer, a calcium silicate-based root canal sealer, from radicular dentine. Int Endod J 2009; 42:34-46. [PMID: 19125978 DOI: 10.1111/j.1365-2591.2008.01490.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM To examine the dislocation resistance of three root canal sealers from radicular dentine with and without immersion in a simulated body fluid (SBF), using a modified push-out test design that produced simulated canal spaces of uniform dimensions under identical cleaning and shaping conditions. METHODOLOGY Sixty single-rooted caries-free human canine teeth were used. Standardized simulated canal spaces were created using 0.04 taper ProFile instruments along the coronal, middle and apical thirds of longitudinal tooth slabs. Following NaOCl/ethylenediamine tetra-acetic acid cleaning, the cavities were filled with ProRoot Endo Sealer, AH Plus Jet or Pulp Canal Sealer. After setting, half of the cavities were tested with a fibre-optic light-illuminated push-out testing device. The rest were immersed in SBF for 4 weeks before push-out evaluation. Failure modes were examined with stereomicroscopy and field emission (FE)-scanning electron microscopy. RESULTS Location of the sealer-filled cavities did not affect push-out strengths. ProRoot Endo Sealer exhibited higher push-out strengths than the other two sealers particularly after SBF storage (P < 0.001). Failure modes were predominantly adhesive and mixed for Pulp Canal Sealer and AH Plus Jet, and predominantly cohesive for ProRoot Endo Sealer. Spherical amorphous calcium phosphate-like phases that spontaneously transformed into apatite-like phases were seen in the fractured specimens of ProRoot Endo Sealer after SBF storage. CONCLUSIONS When tested in bulk without a main core, both 'sealer type' and 'SBF storage' were significant in affecting push-out results. The ProRoot Endo Sealer demonstrated the presence of spherical amorphous calcium phosphate-like phases and apatite-like phases (i.e. ex vivo bioactivity) after SBF storage.
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Affiliation(s)
- B P Huffman
- School of Dentistry, Medical College of Georgia, Augusta, GA 30912-1129, USA
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Rahman Hashem AA, Ghoneim AG, Lutfy RA, Fouda MY. The Effect of Different Irrigating Solutions on Bond Strength of Two Root Canal–filling Systems. J Endod 2009; 35:537-40. [DOI: 10.1016/j.joen.2009.01.003] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 12/31/2008] [Accepted: 01/04/2009] [Indexed: 10/21/2022]
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Nagas E, Altundasar E, Serper A. The effect of master point taper on bond strength and apical sealing ability of different root canal sealers. ACTA ACUST UNITED AC 2009; 107:e61-4. [DOI: 10.1016/j.tripleo.2008.09.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 09/26/2008] [Accepted: 09/27/2008] [Indexed: 11/15/2022]
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Beriat NC, Ertan A, Cehreli ZC, Gulsahi K. Time-dependent Conversion of a Methacrylate-based Sealer Polymerized with Different Light-curing Units. J Endod 2009; 35:110-2. [DOI: 10.1016/j.joen.2008.09.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Revised: 09/17/2008] [Accepted: 09/24/2008] [Indexed: 12/01/2022]
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Gogos C, Theodorou V, Economides N, Beltes P, Kolokouris I. Shear Bond Strength of AH-26 and Epiphany to Composite Resin and Resilon. J Endod 2008; 34:1385-1387. [DOI: 10.1016/j.joen.2008.08.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 07/31/2008] [Accepted: 08/01/2008] [Indexed: 10/21/2022]
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Nagas E, Uyanik MO, Sahin C, Durmaz V, Cehreli ZC. Effects of Different Light-curing Units and Obturation Techniques on the Seal of the Resilon/Epiphany System. J Endod 2008; 34:1230-2. [DOI: 10.1016/j.joen.2008.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 07/05/2008] [Accepted: 07/16/2008] [Indexed: 11/28/2022]
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