The Experts below are selected from a list of 9606 Experts worldwide ranked by ideXlab platform
Nik Rozainah Nik Abd Ghani - One of the best experts on this subject based on the ideXlab platform.
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evaluation of mechanical properties and bond strength of nano hydroxyapatite silica added glass Ionomer Cement
Ceramics International, 2018Co-Authors: Imran Alam Moheet, Norhayati Luddin, Thirumulu P. Kannan, Ismail Ab Rahman, Saman Malik Masudi, Nik Rozainah Nik Abd GhaniAbstract:Abstract The effects of adding nano-hydroxyapatite-silica to the conventional glass Ionomer Cement (Fuji IX GC) matrix were investigated. Nano-hydroxyapatite-silica was synthesized using one-pot sol-gel technique, which was then characterised using fourier transform infrared spectroscopy, x-ray diffraction, scanning electron microscope and transmission electron microscope. In addition, surface hardness, compressive strength, flexural strength, and shear bond strength of the nano-hydroxyapatite-silica-glass Ionomer Cement composite was evaluated. It was found that nano-powder consisted of a mixture of spherical silica particles (~ 50 nm) and elongated hydroxyapatite particles in the range between 100 and 200 nm. Hardness, compressive strength, and flexural strength of nano-HA-35SiO2-GIC is statistically higher than that of nano-HA–21SiO2–GIC, nano-HA-11SiO2-GIC. Highest value for Vickers hardness (64.77 ± 6.18), compressive strength (143.42 ± 13.94 MPa) and flexural strength (17.68 ± 1.81 MPa) were recorded by addition of 10% nano-HA-35SiO2 to GIC, an increase of ∼ 36%, ∼ 19.7% and ∼ 53.34% respectively as compared to conventional GIC. 10% nano-HA–35SiO2-GIC also demonstrated higher shear bond strength as compared to conventional glass Ionomer Cement. The addition of nano-HA-silica to conventional GIC significantly enhanced the mechanical properties of the material. Hence, it can be suggested as a potential dental restorative material in dentistry.
Royce R Runner - One of the best experts on this subject based on the ideXlab platform.
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a comparison of the in vitro retentive strength of glass Ionomer Cement zinc phosphate Cement and mineral trioxide aggregate for the retention of prefabricated posts in bovine incisors
Journal of Endodontics, 2004Co-Authors: Joseph W Vargas, Frederick R Liewehr, Anthony P Joyce, Royce R RunnerAbstract:The purpose of this study was to compare the retentive strength of zinc-phosphate Cement, glass-Ionomer Cement, and mineral trioxide aggregate (MTA) Cement in the retention of prefabricated posts. The root canals of 60 bovine incisors were prepared and obturated with warm gutta-percha. Post space was prepared, the smear layer removed, and posts were luted with zinc-phosphate Cement, glass-Ionomer Cement, or MTA. The specimens were stored at 37°C and 100% humidity for 2 weeks, and then subjected to increasing axial tensile forces by an Instron machine until bond failure occurred. Data were analyzed by a one-way ANOVA and a Tukey-Kramer multiple comparison test. The retentive strengths of zinc phosphate and glass-Ionomer Cements were statistically equivalent, and significantly greater than MTA (p
Imran Alam Moheet - One of the best experts on this subject based on the ideXlab platform.
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evaluation of mechanical properties and bond strength of nano hydroxyapatite silica added glass Ionomer Cement
Ceramics International, 2018Co-Authors: Imran Alam Moheet, Norhayati Luddin, Thirumulu P. Kannan, Ismail Ab Rahman, Saman Malik Masudi, Nik Rozainah Nik Abd GhaniAbstract:Abstract The effects of adding nano-hydroxyapatite-silica to the conventional glass Ionomer Cement (Fuji IX GC) matrix were investigated. Nano-hydroxyapatite-silica was synthesized using one-pot sol-gel technique, which was then characterised using fourier transform infrared spectroscopy, x-ray diffraction, scanning electron microscope and transmission electron microscope. In addition, surface hardness, compressive strength, flexural strength, and shear bond strength of the nano-hydroxyapatite-silica-glass Ionomer Cement composite was evaluated. It was found that nano-powder consisted of a mixture of spherical silica particles (~ 50 nm) and elongated hydroxyapatite particles in the range between 100 and 200 nm. Hardness, compressive strength, and flexural strength of nano-HA-35SiO2-GIC is statistically higher than that of nano-HA–21SiO2–GIC, nano-HA-11SiO2-GIC. Highest value for Vickers hardness (64.77 ± 6.18), compressive strength (143.42 ± 13.94 MPa) and flexural strength (17.68 ± 1.81 MPa) were recorded by addition of 10% nano-HA-35SiO2 to GIC, an increase of ∼ 36%, ∼ 19.7% and ∼ 53.34% respectively as compared to conventional GIC. 10% nano-HA–35SiO2-GIC also demonstrated higher shear bond strength as compared to conventional glass Ionomer Cement. The addition of nano-HA-silica to conventional GIC significantly enhanced the mechanical properties of the material. Hence, it can be suggested as a potential dental restorative material in dentistry.
Alexander H. Kortsaris - One of the best experts on this subject based on the ideXlab platform.
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antiproliferative effect of mineral trioxide aggregate zinc oxide eugenol Cement and glass Ionomer Cement against three fibroblastic cell lines
Journal of Endodontics, 2005Co-Authors: Elisabeth A Koulaouzidou, Panagiotis Beltes, Konstantinos Papazisis, Nikolaos Economides, Alexander H. KortsarisAbstract:An important requirement for dental materials placed in direct contact with living tissues is biocompatibility. The purpose of this study was to evaluate the antiproliferative activity of three dental materials (mineral trioxide aggregate, zinc oxide-eugenol Cement, and glass-Ionomer Cement) against a panel of established fibroblastic cell lines (L929, BHK21/C13, and RPC-C2A). The materials were prepared according to the manufacturer’s instructions and were tested in insert wells for 12, 24, and 48 h. Cell number fraction was estimated by the sulforhodamine-B assay, in reference to controls. The degree of antiproliferative effect in ascending order was mineral trioxide aggregate, glass-Ionomer Cement, and zinc oxide-eugenol Cement in all cell lines tested.
Yasutaka Yawaka - One of the best experts on this subject based on the ideXlab platform.
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calcium charge and release of conventional glass Ionomer Cement containing nanoporous silica
Materials, 2018Co-Authors: Koichi Nakamura, Shigeaki Abe, Hajime Minamikawa, Yasutaka YawakaAbstract:The aim of this study was to evaluate calcium charge and release of conventional glass-Ionomer Cement (GIC) containing nanoporous silica (NPS). Experimental specimens were divided into two groups: the control (GIC containing no NPS) and GIC-NPS (GIC containing 10 wt % NPS). The specimens were immersed in calcium chloride solutions of 5 wt % calcium concentration for 24 h at 37 °C, whereupon the calcium ion release of the specimens was measured. The calcium ion release behavior of GIC-NPS after immersion in the calcium solution was significantly greater than that of the control. Scanning electron microscopy and electron-dispersive X-ray spectroscopy results indicated that calcium penetrated inside the GIC-NPS specimen, while the calcium was primarily localized on the surface of the control specimen. It was demonstrated that NPS markedly improved the calcium charge and release property of GIC.
