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D Kandaswamy - One of the best experts on this subject based on the ideXlab platform.
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an in vitro study to assess the setting and surface crazing of conventional Glass Ionomer Cement when layered over partially set mineral trioxide aggregate
Journal of Endodontics, 2008Co-Authors: Suma Ballal, Nagendrababu Venkateshbabu, Suresh Nandini, D KandaswamyAbstract:Abstract The aim of our study was to assess the setting time and surface crazing of Glass Ionomer Cement when layered over partially set mineral trioxide aggregate (MTA). To assess setting time, 40 hollow, cylindrical stainless steel molds were taken and equally divided into 4 groups. In groups I, II, and III Glass Ionomer Cement was layered over partially setting MTA at 45 minutes, 4 hours, and 3 days, respectively. Group IV was used as a control. An additional 50 specimens were prepared for assessment of surface crazing. Twenty specimens (groups I and II) were prepared to study normal and desiccated patterns of conventional Glass Ionomer Cement, respectively. Thirty specimens (groups III, IV, and V) were prepared by layering Glass Ionomer Cement over partially set MTA at various time intervals. All the specimens were stained with red ink and analyzed for craze lines by light microscopy. From our study, it was observed that there was no statistical difference in setting time of Glass Ionomer Cement when layered over partially set MTA in comparison to that of the control group. No craze lines were observed in those specimens (groups III, IV, and V) when viewed under staining and light microscopy. It could be concluded that conventional Glass Ionomer Cement might be layered over partially set MTA after 45 minutes and could be used for single visit procedures.
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influence of Glass Ionomer Cement on the interface and setting reaction of mineral trioxide aggregate when used as a furcal repair material using laser raman spectroscopic analysis
Journal of Endodontics, 2007Co-Authors: Suresh Nandini, Suma Ballal, D KandaswamyAbstract:The prolonged setting time of mineral trioxide aggregate (MTA) is the main disadvantage of this material. This study analyzes the influence of Glass-Ionomer Cement on the setting of MTA using laser Raman spectroscopy (LRS). Forty hollow Glass molds were taken in which MTA was placed. In Group I specimens, MTA was layered with Glass-Ionomer Cement after 45 minutes. Similar procedures were done for Groups II and III at 4 hours and 3 days, respectively. No Glass Ionomer was added in Group IV, which were then considered as control samples. Each sample was scanned at various time intervals. At each time interval, the interface between MTA and Glass-Ionomer Cement was also scanned (excluding Group IV). The spectral analysis proved that plaCement of Glass-Ionomer Cement over MTA after 45 minutes did not affect its setting reaction and calcium salts may be formed in the interface of these two materials.
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Comparative Study Of Surface Finish Of Conventional Glass Ionomer Cement With Fast Setting Glass Ionomer Cement – In Vitro Study
Journal of Conservative Dentistry, 1999Co-Authors: K Sadasiva, C. V Subbarao, D KandaswamyAbstract:An in-vitro study was done to compare the surface finish of conventional Glass Ionomer Cement with that of fast setting Glass Ionomer Cement. (In-vitro study) Ten intact non-carious central incisors were selected and Non-retentive class V cavities were prepared and 5 teeth were filled with conventional Glass Ionomer Cement (Group I) and remaining 5 teeth were filled with fast setting Glass Ionomer (Group II). All the samples were finished and polished. The samples were subjected to Scanning Electron Microscope (SEM) analysis. Results showed that under all magnifications fast setting Glass Ionomer Cement exhibits better surface finish and marginal integrity when compared to conventional Glass Ionomer Cement.
Ikuya Watanabe - One of the best experts on this subject based on the ideXlab platform.
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Modification of resin modified Glass Ionomer Cement by addition of bioactive Glass nanoparticles
Journal of Materials Science: Materials in Medicine, 2015Co-Authors: Alireza Valanezhad, Tetsuro Odatsu, Koichi Udoh, Takanobu Shiraishi, Takashi Sawase, Ikuya WatanabeAbstract:In the present study, sol–gel derived nanoparticle calcium silicate bioactive Glass was added to the resin-modified light cure Glass-Ionomer Cement to assess the influence of additional bioactive Glass nanoparticles on the mechanical and biological properties of resin-modified Glass-Ionomer Cement. The fabricated bioactive Glass nanoparticles added resin-modified Glass-Ionomer Cements (GICs) were immersed in the phosphate buffer solution for 28 days to mimic real condition for the mechanical properties. Resin-modified GICs containing 3, 5 and 10 % bioactive Glass nanoparticles improved the flexural strength compared to the resin-modified Glass-Ionomer Cement and the samples containing 15 and 20 % bioactive Glass nanoparticles before and after immersing in the phosphate buffer solution. Characterization of the samples successfully expressed the cause of the critical condition for mechanical properties. Cell study clarified that resin-modified Glass-Ionomer Cement with high concentrations of bioactive Glass nanoparticles has higher cell viability and better cell morphology compare to control groups. The results for mechanical properties and toxicity approved that the considering in selection of an optimum condition would have been a more satisfying conclusion for this study.
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characterization of the mineral trioxide aggregate resin modified Glass Ionomer Cement interface in different setting conditions
Journal of Endodontics, 2012Co-Authors: Takashi Komabayashi, Takanobu Shiraishi, Etsuko Watanabe, Ikuya WatanabeAbstract:Introduction Mineral trioxide aggregate (MTA) has been used successfully for perforation repair, vital pulpotomies, and direct pulp capping. However, little is known about the interactions between MTA and Glass Ionomer Cement (GIC) in final restorations. In this study, 2 null hypotheses were tested: (1) GIC plaCement time does not affect the MTA-GIC structural interface and hardness and (2) moisture does not affect the MTA-GIC structural interface and hardness.
Michael Francis Burrow - One of the best experts on this subject based on the ideXlab platform.
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microtensile bond strength of resin modified Glass Ionomer Cement to sound and artificial caries affected root dentin with different conditioning
Operative Dentistry, 2017Co-Authors: Amr Saad, Michael Francis Burrow, Go Inoue, Toru Nikaido, Masaomi Ikeda, Junji TagamiAbstract:Clinical Relevance Both self conditioner and cavity conditioner have the potential to improve the bond strength and durability of resin-modified Glass Ionomer Cement (RM-GIC) to sound and carious root dentin; however, ethylenediamine tetraacetic acid conditioning with RM-GIC to root dentin should be avoided.
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Posterior resin composite restorations with or without resin-modified, Glass-Ionomer Cement lining: a 1-year randomized, clinical trial
Journal of investigative and clinical dentistry, 2011Co-Authors: Danuchit Banomyong, Choltacha Harnirattisai, Michael Francis BurrowAbstract:AIM: To investigate the effect of resin-modified, Glass-Ionomer Cement lining on the quality of posterior resin composite restorations, bonded with a two-step, total-etch or self-etching adhesive, at 1 year. METHODS: Patients with 1-4 moderate-to-deep, primary occlusal caries in molars were informed and recruited. A total of 110 composite restorations were placed in 75 participants, with one of four restorative procedures: (a) bonded with a total-etch adhesive (Single Bond 2); (b) lined with Glass-Ionomer Cement (Fuji Lining LC), and then bonded with total-etch adhesive; (c) bonded with a self-etching adhesive (Clearfil SE Bond); and (d) lined with Glass-Ionomer Cement, and then bonded with self-etching adhesive. RESULTS: At 1 year, 57 patients (86 restorations) attended the recall. Each of the restorations was evaluated and scored from 1 (clinically excellent) to 5 (clinically poor) using the following criteria: (a) patient satisfaction; (b) fracture and retention; (c) marginal adaptation; (d) recurrent caries; and (e) post-operative sensitivity. At 1 year, the qualities of the restorations were not significantly affected by the plaCement of Glass-Ionomer Cement lining, regardless of the adhesive used (P > 0.05). Most of the restorations were scored 1 for all criteria. CONCLUSIONS: The benefit of placing a Glass-Ionomer Cement liner in resin composite restoration is questionable.
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the effect of ytterbium fluoride and barium sulphate nanoparticles on the reactivity and strength of a Glass Ionomer Cement
Dental Materials, 2006Co-Authors: L Prentice, Martin J Tyas, Michael Francis BurrowAbstract:Abstract Objectives While clinical advantages of Glass-Ionomers include fluoride release and radiopacity, disadvantages include low strength, slow initial setting times and opacity. The addition of nanoparticles, in particular those containing fluoride and cross-linkable ions, may mitigate the disadvantages while further improving the advantages. This investigation evaluated the effects of the addition of ytterbium fluoride (YbF 3 ) and barium sulphate (BaSO 4 ) on the strength and reactivity of a commercial Glass-Ionomer Cement. Methods YbF 3 and BaSO 4 nanoparticles were incorporated into the powder component of Riva SC (SDI Ltd., Bayswater, Australia) at 1, 2, 5, 10, 15, and 25% by weight. Capsules were assembled at a powder:liquid ratio of 2.9:1, activated and mixed, and the resultant pastes evaluated for working time, initial setting time, 24-h surface hardness and 24-h compressive strength. Results Working and initial setting times were reduced with the addition of YbF 3 . Addition of BaSO 4 at low concentrations reduced working and initial setting times, but further addition delayed the setting reaction. Compressive strength decreased with the addition of either YbF 3 or BaSO 4 , while surface hardness was slightly but insignificantly higher at 1–2% nanoparticles and then decreased with increasing nanoparticle concentrations. Significance Nanoparticles modified the setting characteristics, strength and surface hardness of a commercial Glass-Ionomer Cement, and may be useful for refining the handling characteristics of these materials. Further improvements in powder blending may result in more significant improvements in mechanical properties.
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incorporation of casein phosphopeptide amorphous calcium phosphate into a Glass Ionomer Cement
Journal of Dental Research, 2003Co-Authors: S A Mazzaoui, Martin J Tyas, D Eakins, Michael Francis Burrow, Stuart G Dashper, Eric C ReynoldsAbstract:Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) nanocomplexes have been shown to prevent demineralization and promote remineralization of enamel subsurface lesions in animal and in situ caries models. The aim of this study was to determine the effect of incorporating CPP-ACP into a self-cured Glass-Ionomer Cement (GIC). Incorporation of 1.56% w/w CPP-ACP into the GIC significantly increased microtensile bond strength (33%) and compressive strength (23%) and significantly enhanced the release of calcium, phosphate, and fluoride ions at neutral and acidic pH. MALDI mass spectrometry also showed casein phosphopeptides from the CPP-ACP nanocomplexes to be released. The release of CPP-ACP and fluoride from the CPP-ACP-containing GIC was associated with enhanced protection of the adjacent dentin during acid challenge in vitro.
Suresh Nandini - One of the best experts on this subject based on the ideXlab platform.
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an in vitro study to assess the setting and surface crazing of conventional Glass Ionomer Cement when layered over partially set mineral trioxide aggregate
Journal of Endodontics, 2008Co-Authors: Suma Ballal, Nagendrababu Venkateshbabu, Suresh Nandini, D KandaswamyAbstract:Abstract The aim of our study was to assess the setting time and surface crazing of Glass Ionomer Cement when layered over partially set mineral trioxide aggregate (MTA). To assess setting time, 40 hollow, cylindrical stainless steel molds were taken and equally divided into 4 groups. In groups I, II, and III Glass Ionomer Cement was layered over partially setting MTA at 45 minutes, 4 hours, and 3 days, respectively. Group IV was used as a control. An additional 50 specimens were prepared for assessment of surface crazing. Twenty specimens (groups I and II) were prepared to study normal and desiccated patterns of conventional Glass Ionomer Cement, respectively. Thirty specimens (groups III, IV, and V) were prepared by layering Glass Ionomer Cement over partially set MTA at various time intervals. All the specimens were stained with red ink and analyzed for craze lines by light microscopy. From our study, it was observed that there was no statistical difference in setting time of Glass Ionomer Cement when layered over partially set MTA in comparison to that of the control group. No craze lines were observed in those specimens (groups III, IV, and V) when viewed under staining and light microscopy. It could be concluded that conventional Glass Ionomer Cement might be layered over partially set MTA after 45 minutes and could be used for single visit procedures.
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influence of Glass Ionomer Cement on the interface and setting reaction of mineral trioxide aggregate when used as a furcal repair material using laser raman spectroscopic analysis
Journal of Endodontics, 2007Co-Authors: Suresh Nandini, Suma Ballal, D KandaswamyAbstract:The prolonged setting time of mineral trioxide aggregate (MTA) is the main disadvantage of this material. This study analyzes the influence of Glass-Ionomer Cement on the setting of MTA using laser Raman spectroscopy (LRS). Forty hollow Glass molds were taken in which MTA was placed. In Group I specimens, MTA was layered with Glass-Ionomer Cement after 45 minutes. Similar procedures were done for Groups II and III at 4 hours and 3 days, respectively. No Glass Ionomer was added in Group IV, which were then considered as control samples. Each sample was scanned at various time intervals. At each time interval, the interface between MTA and Glass-Ionomer Cement was also scanned (excluding Group IV). The spectral analysis proved that plaCement of Glass-Ionomer Cement over MTA after 45 minutes did not affect its setting reaction and calcium salts may be formed in the interface of these two materials.
Suma Ballal - One of the best experts on this subject based on the ideXlab platform.
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an in vitro study to assess the setting and surface crazing of conventional Glass Ionomer Cement when layered over partially set mineral trioxide aggregate
Journal of Endodontics, 2008Co-Authors: Suma Ballal, Nagendrababu Venkateshbabu, Suresh Nandini, D KandaswamyAbstract:Abstract The aim of our study was to assess the setting time and surface crazing of Glass Ionomer Cement when layered over partially set mineral trioxide aggregate (MTA). To assess setting time, 40 hollow, cylindrical stainless steel molds were taken and equally divided into 4 groups. In groups I, II, and III Glass Ionomer Cement was layered over partially setting MTA at 45 minutes, 4 hours, and 3 days, respectively. Group IV was used as a control. An additional 50 specimens were prepared for assessment of surface crazing. Twenty specimens (groups I and II) were prepared to study normal and desiccated patterns of conventional Glass Ionomer Cement, respectively. Thirty specimens (groups III, IV, and V) were prepared by layering Glass Ionomer Cement over partially set MTA at various time intervals. All the specimens were stained with red ink and analyzed for craze lines by light microscopy. From our study, it was observed that there was no statistical difference in setting time of Glass Ionomer Cement when layered over partially set MTA in comparison to that of the control group. No craze lines were observed in those specimens (groups III, IV, and V) when viewed under staining and light microscopy. It could be concluded that conventional Glass Ionomer Cement might be layered over partially set MTA after 45 minutes and could be used for single visit procedures.
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influence of Glass Ionomer Cement on the interface and setting reaction of mineral trioxide aggregate when used as a furcal repair material using laser raman spectroscopic analysis
Journal of Endodontics, 2007Co-Authors: Suresh Nandini, Suma Ballal, D KandaswamyAbstract:The prolonged setting time of mineral trioxide aggregate (MTA) is the main disadvantage of this material. This study analyzes the influence of Glass-Ionomer Cement on the setting of MTA using laser Raman spectroscopy (LRS). Forty hollow Glass molds were taken in which MTA was placed. In Group I specimens, MTA was layered with Glass-Ionomer Cement after 45 minutes. Similar procedures were done for Groups II and III at 4 hours and 3 days, respectively. No Glass Ionomer was added in Group IV, which were then considered as control samples. Each sample was scanned at various time intervals. At each time interval, the interface between MTA and Glass-Ionomer Cement was also scanned (excluding Group IV). The spectral analysis proved that plaCement of Glass-Ionomer Cement over MTA after 45 minutes did not affect its setting reaction and calcium salts may be formed in the interface of these two materials.