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Rosa SJ, Duarte MAH, Silva EJNL, Oliveira MCGD, Titato PCG, Vasconcelos BCD, Vivan RR, Alcalde MP. Does the Mixing Method of AH Plus Jet Affect its Physicochemical and Mechanical Properties? J Endod 2024:S0099-2399(24)00358-3. [PMID: 38901643 DOI: 10.1016/j.joen.2024.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 05/22/2024] [Accepted: 06/10/2024] [Indexed: 06/22/2024]
Abstract
INTRODUCTION The purpose of this study was to evaluate whether the mixing method of AH Plus Jet sealer affects its physicochemical and mechanical properties. METHODS The properties of AH Plus Jet sealer were analyzed when mixed using either the Auto Mix Tip or manual mixing. The evaluated properties included radiopacity (n = 5), initial and final setting times (n = 5), flow (n = 5), and solubility (n = 3), following specifications outlined in ISO 6876/2012 and ADA Nº 57/2000. pH levels were measured at intervals of 3, 24, 72, and 168 hours (n = 10). The push-out bond strength test was conducted using a universal testing machine and using bovine teeth (n = 30). Failure modes were analyzed with stereomicroscopy. Porosity was evaluated under micro-CT (n = 5), and scanning electron microscopy was also performed (n = 5). One-way analysis of variance and Tukey, unpaired t-tests, or Mann-Whitney tests were used with a significance level of 5%. RESULTS The Auto Mix exhibited a radiopacity value of 12.11 mmAl, whereas manual mixing resulted in 12.55 mmAl (P > .05). For initial and final setting times, Auto Mix showed 901 minutes and 1779 minutes, respectively, while manual mixing recorded values of 631 minutes and 1504 minutes (P < .05). In terms of flow, Auto Mix demonstrated higher values (25.26 mm) than manual mixing (21.71 mm) (P < .05). No statistical differences were observed between the two methods for solubility and pH (P > .05). Manual mixing presented a higher bond strength value (14.52 MPa) than Auto Mix (9.81 MPa) (P < .05). The mixed failure mode was the most frequent outcome for both methods. The highest porosity was observed for Auto Mix (P < .05). Scanning electron microscopy analysis revealed that manual mixing resulted in a smoother surface with fewer pores and smaller, more evenly distributed agglomerates compared to automatic mixing. CONCLUSION The mixing method employed for AH Plus Jet sealer influences some physicochemical and mechanical properties of the material.
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Affiliation(s)
- Stefani Jovedi Rosa
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil
| | | | - Maria Carolina Guiotti de Oliveira
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil
| | - Pedro Cesar Gomes Titato
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil
| | | | - Rodrigo Ricci Vivan
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil
| | - Murilo Priori Alcalde
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Bauru, Brazil.
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Radwanski M, Leski M, Puszkarz AK, Sokolowski J, Hardan L, Bourgi R, Sauro S, Lukomska-Szymanska M. A Micro-CT Analysis of Initial and Long-Term Pores Volume and Porosity of Bioactive Endodontic Sealers. Biomedicines 2022; 10:biomedicines10102403. [PMID: 36289666 PMCID: PMC9599172 DOI: 10.3390/biomedicines10102403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/19/2022] [Accepted: 09/23/2022] [Indexed: 11/21/2022] Open
Abstract
The evaluation of the porosities within the interface of root canals obturated with endodontics materials is extremely important for the long-term success of endodontic treatments. The aim of this study was to compare initial and long-term volume of pores (total, open, closed) and porosity (total, regional) of three bioactive endodontic sealers: GuttaFlow Bioseal, Total Fill BC Sealer, and BioRoot RCS. Root canals were obturated with three “bioactive” sealers using the single-cone technique. The volume of open and closed pores and porosity were calculated using a micro-computed tomography (MCT) method. The measurements were performed after 7 days (initial) and after 6 months (long-term) of incubation. Statistical significance was considered at p < 0.05. The total volume of pores remained unchanged after the 6-month storage. GuttaFlow Bioseal exhibited significantly higher long-term volume in open pores than Total Fill BC Sealer. The total porosity in all the tested sealers presented no statistically significant change after the 6-month storage, except for BioRoot RCS. The total porosity values of this latter material significantly increased after long-term incubation, especially in the apical region. In conclusion, the use of bioactive sealers with excessive tendency to create porosities both in shorth- and long-term periods of storage may compromise the long-term success of endodontic treatments.
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Affiliation(s)
- Mateusz Radwanski
- Department of Endodontics, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Michal Leski
- Department of Endodontics, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Adam K. Puszkarz
- Institute of Material Science of Textiles and Polymer Composites, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 116 Żeromskiego Street, 90-924 Lodz, Poland
| | - Jerzy Sokolowski
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Louis Hardan
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon
| | - Rim Bourgi
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Departamento de Odontología, Facultad de Ciencias de la Salud, Universidad CEU-Cardenal Herrera C/Del Pozo ss/n, Alfara del Patriarca, 46115 Valencia, Spain
- Department of Therapeutic Dentistry, I.M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia
| | - Monika Lukomska-Szymanska
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
- Correspondence: ; Tel.: +48-605-721-200 or +48-426-757-429
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Comparison of Two Root Canal Filling Techniques: Obturation with Guttacore Carrier Based System and Obturation with Guttaflow2 Fluid Gutta-Percha. Dent J (Basel) 2022; 10:dj10040071. [PMID: 35448065 PMCID: PMC9032128 DOI: 10.3390/dj10040071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 03/02/2022] [Accepted: 03/14/2022] [Indexed: 12/10/2022] Open
Abstract
Introduction: The aim of the present study was to compare the quality of the root canal obturation obtained with two different techniques, i.e., thermoplastic gutta-percha introduced through a carrier (GuttaCore) and fluid gutta-percha (GuttaFlow2). Materials and Methods: The study included 40 permanent single-rooted human teeth, divided into two groups and obturated with Guttaflow (group G) and with GuttaCore (group T). The teeth were fixed and transversely sectioned, they were examined by scanning electron microscopy. The dentin–cement–gutta–percha interface and the percentage of voids produced by the two techniques were statistically analyzed. Results: GuttaCore showed a better filling in the apical third of the canal with a percentage of voids equal to 5%. GuttaFlow showed a lower percentage of voids in the middle and coronal thirds of the canal, 1.6% of coronal voids. Statistical analysis showed a statistically significant difference in the percentage of voids in the two groups (GuttaCore and Guttaflow2) in each portion. Conclusions: GuttaFlow2 seems to flow optimally in the middle and coronal third of the canal, with greater difficulty in filling the apical third. Due to the rigidity of the carrier, GuttaCore is able to reach better the most apical portions of the canals, with greater difficulty in creating the three-dimensional seal at the level of the middle third and coronal third.
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The Effect of Sealer Application Methods on Voids Volume after Aging of Three Calcium Silicate-Based Sealers: A Micro-Computed Tomography Study. Tomography 2022; 8:778-788. [PMID: 35314641 PMCID: PMC8938853 DOI: 10.3390/tomography8020064] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/12/2022] [Accepted: 03/09/2022] [Indexed: 11/28/2022] Open
Abstract
During obturation, air voids are undesirable as they may provide shelter for microorganisms or passage for fluids. This study aimed to compare the occurrence of voids between three calcium silicate-based sealers (CSBSs) (MTA-Fillapex, BioRoot-RCS, Bio-C) and the change in their volume after aging. In addition, we aimed to compare voids when using two sealer application methods: lentulo-spiral (LS) and gutta-percha (GP) cone. Thirty extracted mandibular premolars (n = 30) were endodontically prepared and obturated using single GP cone (SGPC) technique. Each sealer was applied to 10 teeth (n = 10) using LS or GP. Micro-computed tomography (micro-CT) was used to quantify the volume of root filling and voids before and after 8-week storage in a phosphate-rich medium. The percentage of root filling and voids were compared between the groups using a Mann–Whitney U test and Kruskal–Wallis test with a Bonferroni correction. Before aging, the percentages of root filling volume after obturation were comparable with no significant differences between sealers (p = 0.325) or application methods (p = 0.950). After aging, the voids’ volume increased significantly in all sealers (p ≤ 0.05). However, no significant differences were found between sealers (p = 0.302). In conclusion, voids in CSBSs may not reduce in size with aging; hence, SGPC should be carefully selected for suitable cases.
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Roberts H, Fuentealba R, Brewster J. Microtomographic Analysis of Resin Composite Core Material Porosity. J Prosthodont 2020; 29:623-630. [PMID: 32180298 DOI: 10.1111/jopr.13167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2020] [Indexed: 11/29/2022] Open
Abstract
PURPOSE To nondestructively evaluate the porosity of ten contemporary resin composite core materials using microtomographic (microCT) analysis. MATERIAL AND METHODS Resin composite core material samples (n = 12) including dual-cure, visible light cure only, and a self-cure material were fabricated using a standardized mold following manufacturer's recommendations. After storage in phosphate buffered saline for one week, specimens were analyzed using a microCT unit at 5.3-µm resolution over a rotational range of 360°. Image 3D recombination and analysis was accomplished using microCT software. Evaluated parameters included material volume investigated, closed pore number and volume, as well as closed pore percentage. Parameter mean values were evaluated with Kruskal-Wallis/Dunn at a 95% confidence level (α = 0.05). RESULTS Mean percent total porosity with standard deviation identified significant differences in decreasing order as Ti-Core: 2.2 (0.4) > Ti-Core Auto E: 1.3 (0.3) = Ti-Core Flow Plus: 1.1 (0.02) > Clearfil Photo Core: 0.94 (0.5) = Clearfil DC Core Plus: 0.6 (0.18) = MultiCore Flow: 0.58 (0.1) > Fluorocore 2+: 0.14 (0.2) = Build-It FR: 0.068 (0.02) = Gradia Core: 0.03 (0.02) = Rebilda DC: 0.02 (0.01). A pilot microCT evaluation evaluating a mixing tip revealed incomplete mixture between the two resins with porosity introduced from turbulence as the materials are forced through the tip during preparation. CONCLUSIONS A wide range of porosity was identified between the ten materials evaluated. These preliminary results warrant more investigation evaluating additional resin composite core materials, the preparation capabilities of automix tips, and porosity presence in the unmixed materials.
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Affiliation(s)
- Howard Roberts
- Division of Restorative Dentistry, University of Kentucky College of Dentistry, Lexington, KY.,Postgraduate Dental College, Uniformed Services University of the Health Sciences, Biloxi, MS
| | - Rodrigo Fuentealba
- Division of Prosthodontics, University of Kentucky College of Dentistry, Lexington, KY
| | - John Brewster
- Postgraduate Dental College, Uniformed Services University of the Health Sciences, Biloxi, MS
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Gheller R, Burey A, Vicentin BLS, Reis PJ, Appoloni CR, Garbelini CCD, Hoeppner MG. Microporosity and polymerization contraction as function of depth in dental resin cements by X‐ray computed microtomography. Microsc Res Tech 2020; 83:658-666. [DOI: 10.1002/jemt.23456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 01/07/2020] [Accepted: 02/01/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Rafaela Gheller
- Departamento de Odontologia RestauradoraUniversidade Estadual de Londrina Londrina Puerto Rico Brazil
| | - Adrieli Burey
- Departamento de Odontologia RestauradoraUniversidade Estadual de Londrina Londrina Puerto Rico Brazil
| | | | - Paulo José Reis
- Departamento de FísicaUniversidade Estadual do Centro Oeste Guarapuava Puerto Rico Brazil
| | | | | | - Márcio Grama Hoeppner
- Departamento de Odontologia RestauradoraUniversidade Estadual de Londrina Londrina Puerto Rico Brazil
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Torres FFE, Guerreiro-Tanomaru JM, Bosso-Martelo R, Espir CG, Camilleri J, Tanomaru-Filho M. Solubility, Porosity, Dimensional and Volumetric Change of Endodontic Sealers. Braz Dent J 2019; 30:368-373. [PMID: 31340227 DOI: 10.1590/0103-6440201902607] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 03/03/2019] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to evaluate physical properties of endodontic sealers (AH Plus, MTA Fillapex and Endofill), by conventional and micro-CT tests. Dimensional stability was evaluated after immersion of materials in distilled water for 30 days. Solubility and volumetric change were evaluated after 7 and 30 days of immersion in distilled water. Solubility was evaluated by means of mass loss and volumetric change was assessed by micro-CT. Porosity was evaluated under a microscope after 7 days of immersion in distilled water, and by using micro-CT after setting and immersion in distilled water for 7 and 30 days. Statistical analysis was performed by ANOVA and Tukey's test with 5% significance level. MTA Fillapex presented the highest solubility (p<0.05), showing values above the ISO/ADA recommendations. MTA Fillapex presented higher volumetric and dimensional changes, followed by Endofill and AH Plus (p<0.05). Dimensional stability of the MTA Fillapex and AH Plus did not follow ISO/ADA standards. The highest total porosity was observed for MTA Fillapex (p<0.05). Endofill had higher total porosity than AH Plus according to microscope evaluation (p<0,05), and both sealers were similar in micro-CT assessment (p>0,05). In conclusion, MTA Fillapex presented higher solubility, dimensional and volumetric change besides porosity compared to the other evaluated sealers. The assessed physical properties of sealers are related, and the different tests provided complementary data. Micro-CT is a valuable method for assessment of physical properties of endodontic materials.
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Affiliation(s)
| | | | - Roberta Bosso-Martelo
- Department of Dentistry, School of Dentistry, UFBA - Universidade Federal da Bahia, Salvador, BA, Brazil
| | - Camila Galletti Espir
- Department of Restorative Dentistry, School of Dentistry, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Clinical and Medical Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Mario Tanomaru-Filho
- Department of Restorative Dentistry, School of Dentistry, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
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Torres FFE, Guerreiro-Tanomaru JM, Bosso-Martelo R, Chavez-Andrade GM, Tanomaru Filho M. Solubility, porosity and fluid uptake of calcium silicate-based cements. J Appl Oral Sci 2018; 26:e20170465. [PMID: 29791569 PMCID: PMC5953561 DOI: 10.1590/1678-7757-2017-0465] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 01/05/2018] [Indexed: 12/02/2022] Open
Abstract
Objective: To evaluate the absorption/fluid uptake, solubility and porosity of White mineral trioxide aggregate (MTA) Angelus, Biodentine (BIO), and zinc oxide-eugenol (ZOE). Material and Methods: Solubility was evaluated after immersion in distilled water for 7 and 30 days. Porosity was evaluated using digital inverted microscope, scanning electron microscope (SEM) and micro-computed tomography (micro-CT). For the fluid uptake test, specimens were immersed in Hank's balanced salt solution (HBSS) for 1, 7, 14 and 28 days. Fluid absorption, solubility and porosity of the materials were measured after each period. Statistical evaluation was performed using one-way analysis of variance (ANOVA) and Tukey tests, with a significance level at 5%. Results: After 7 and 30 days, BIO showed the highest solubility (p<0.05). All methods demonstrated that MTA had total porosity higher than BIO and ZOE (p<0.05). Micro-CT analysis showed that MTA had the highest porosity at the initial period, after its setting time (p<0.05). After 7 and 30 days, ZOE had porosity lower than MTA and BIO (p<0.05). Absorption was similar among the materials (p>0.05), and higher fluid uptake and solubility were observed for MTA in the fluid uptake test (p<0.05). Conclusions: BIO had the highest solubility in the conventional test and MTA had higher porosity and fluid uptake. ZOE had lower values of solubility, porosity and fluid uptake. Solubility, porosity and fluid uptake are related, and the tests used provided complementary data.
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Affiliation(s)
- Fernanda Ferrari Esteves Torres
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, Araraquara, São Paulo, Brasil
| | - Juliane Maria Guerreiro-Tanomaru
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, Araraquara, São Paulo, Brasil
| | - Roberta Bosso-Martelo
- Departamento de Clínica Odontologia, Faculdade de Odontologia, Universidade Federal da Bahia, Salvador, Bahia, Brasil
| | - Gisselle Moraima Chavez-Andrade
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, Araraquara, São Paulo, Brasil
| | - Mario Tanomaru Filho
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, Araraquara, São Paulo, Brasil
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He J, Song Y, Chen JP. Development of a novel biochar/PSF mixed matrix membrane and study of key parameters in treatment of copper and lead contaminated water. CHEMOSPHERE 2017; 186:1033-1045. [PMID: 28847092 DOI: 10.1016/j.chemosphere.2017.07.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 07/04/2017] [Accepted: 07/07/2017] [Indexed: 06/07/2023]
Abstract
Mixed matrix membrane (MMM) has attracted increasing attentions in various applications, such as water treatment. In this study, an innovative biochar/polysulfone (PSF) mixed matrix hollow fiber membrane was fabricated by incorporating micro-sized biochar particles in the PSF matrix. It was demonstrated that the membrane was more hydrophilic than the pure PSF membrane. Higher water flux was obtained. The adsorption of copper and lead on the MMM increased as the pH was increased with the maximum adsorption capacity observed at pH > 4.5. The adsorption equilibrium was established in 7 and 12 h for lead and copper, respectively. The adsorption kinetics and isotherm followed the intraparticle surface diffusion model and Freundlich isotherm, respectively. The presence of humic acid (HA) had a little effect on the adsorption, while the ionic strength showed an adverse effect on the removal. In addition, the feed concentration and cross flow rate significantly affected the removal efficiency in a continuous filtration mode. The increase in feed concentration and cross flow rate resulted in a reduction in the volume of treated permeate that had the copper/lead concentrations below the regulated levels for drinking water. The MMM exhibited an excellent regeneration-reuse performance in the removal of both copper and lead. Finally, our mechanism studies indicated that the uptake of heavy metals was controlled by a combination of key reactions of complexation, ion-exchange and precipitation. This study indicated that the MMM can be applied as an effective and eco-friendly material for the treatment of heavy metals contaminated water.
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Affiliation(s)
- Jinsong He
- Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore; Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - Yihua Song
- Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore
| | - J Paul Chen
- Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore.
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Burey A, dos Reis PJ, Santana Vicentin BL, Dezan Garbelini CC, Grama Hoeppner M, Appoloni CR. Polymerization shrinkage and porosity profile of dual cure dental resin cements with different adhesion to dentin mechanisms. Microsc Res Tech 2017; 81:88-96. [DOI: 10.1002/jemt.22960] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/22/2017] [Accepted: 10/12/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Adrieli Burey
- Student of the Master Degree Program in Odontology at Universidade Estadual de Londrina - UEL, Londrina; Paraná Brasil
| | - Paulo José dos Reis
- Department of Physics; State University of Central West - UNICENTRO; Guarapuava Paraná Brasil
| | | | | | - Márcio Grama Hoeppner
- Department of Restorative Odontology; State University of Londrina - UEL; Londrina Paraná Brasil
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11
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Siboni F, Taddei P, Prati C, Gandolfi MG. Properties of NeoMTA Plus and MTA Plus cements for endodontics. Int Endod J 2017; 50 Suppl 2:e83-e94. [DOI: 10.1111/iej.12787] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 04/25/2017] [Indexed: 11/27/2022]
Affiliation(s)
- F. Siboni
- Laboratory of Biomaterials and Oral Pathology; Dental School; Department of Biomedical and NeuroMotor Sciences; University of Bologna; Bologna Italy
| | - P. Taddei
- Unit of Biochemistry; Department of Biomedical and NeuroMotor Sciences; University of Bologna; Bologna Italy
| | - C. Prati
- Endodontic Clinical Section; Dental School; Department of Biomedical and NeuroMotor Sciences; University of Bologna; Bologna Italy
| | - M. G. Gandolfi
- Laboratory of Biomaterials and Oral Pathology; Dental School; Department of Biomedical and NeuroMotor Sciences; University of Bologna; Bologna Italy
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De-Deus G, Scelza MZ, Neelakantan P, Sharma S, Neves ADA, Silva EJNL. Three-dimensional Quantitative Porosity Characterization of Syringe- versus Hand-mixed Set Epoxy Resin Root Canal Sealer. Braz Dent J 2015; 26:607-11. [DOI: 10.1590/0103-6440201300074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 09/11/2015] [Indexed: 11/22/2022] Open
Abstract
The aim of the present study was to compare the porosity characteristics of AH Plus Jet(tm) syringe-mix and the conventional hand-mixed AH Plus root canal sealers by three-dimensional quantitative high-resolution micro-computed tomography (micro-CT). Seven test specimens were prepared from each tested sealer by a single operator following the manufacturer's instructions and poured into pre-lubricated plastic split-ring moulds. Set sealer test specimens were scanned using a micro-CT device and the shadow images were reconstructed into cross-sectional slices. The evaluated parameters were (i) total pore count, (ii) total pore volume and mean pore volume, (iii) total porosity (% of pore volume in relation to total sealer volume) and (iv) mean pore distance to the sealer lateral external surface. In both groups, most pores were localized within the external sealer perimeter (0.05 mm from the external surface). Hand-mixed AH Plus specimens showed statistically significant higher mean total pore count, total pore volume and total porosity (p=0.001) than the syringe-mixed specimens. However, mean pore sizes in AH Plus syringe-mixed specimens were significantly higher (p=0.046) than the AH Plus hand-mixed counterparts. Hand-mixed AH Plus was associated with higher total mean pore count, volume and total porosity compared to syringe mixed AH Plus.
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He J, Matsuura T, Chen JP. A novel Zr-based nanoparticle-embedded PSF blend hollow fiber membrane for treatment of arsenate contaminated water: Material development, adsorption and filtration studies, and characterization. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.10.041] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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De Souza ETG, Nunes Tameirão MD, Roter JM, De Assis JT, De Almeida Neves A, De-Deus GA. Tridimensional quantitative porosity characterization of three set calcium silicate-based repair cements for endodontic use. Microsc Res Tech 2013; 76:1093-8. [DOI: 10.1002/jemt.22270] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 06/25/2013] [Accepted: 07/10/2013] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Joaquim Teixeira De Assis
- Polytechnic Institute; State University of Rio de Janeiro (IPRJ/UERJ); Nova Friburgo Rio de Janeiro Brazil
| | - Aline De Almeida Neves
- Health Sciences Center (UNIGRANRIO); Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
| | - Gustavo André De-Deus
- Health Sciences Center (UNIGRANRIO); Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
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15
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Behavior of resin-based endodontic sealer cements in thin and thick films. Dent Mater 2012; 28:e150-9. [DOI: 10.1016/j.dental.2012.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 03/20/2012] [Accepted: 04/16/2012] [Indexed: 11/23/2022]
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