Formulation and characterization of glass–ceramics based on Na2Ca2Si3O9–Ca5(PO4)3F–Mg2SiO4-system in relation to their biological activity

Abo-Mosallam, H.A.; Salama, S.N.; Salman, S.M.

doi:10.1007/s10856-009-3811-4

Cited by 20 publications

(16 citation statements)

References 23 publications

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“…The T g values of G2 glass were decreased by MgO/CaO partial substitution, possibly as a result of the magnesium entering the glass network. The formation of a weaker bond between the oxygen and the magnesium regarding a Si-O bond (3.35 eV vs. 8.10 eV) could result in a reduction in the T g as less energy is required to break the bonds 1 . On the other hand, the decrease in the T g by ZnO/CaO replacement may be attributed to the fact that zinc acts as a network modifier, and not as a network former in calcium zinc silicate glasses 5 .…”

Section: Discussionmentioning

confidence: 99%

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

et al. 2015

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Some weaknesses of conventional glass ionomer cement (GIC) as dental materials, for instance the lack of bioactive potential and poor mechanical properties, remain unsolved. Objective The purpose of this study was to investigate the effects of the partial replacement of CaO with MgO or ZnO on the mechanical and biological properties of the experimental glass ionomer cements.Material and Methods Calcium fluoro-alumino-silicate glass was prepared for an experimental glass ionomer cement by melt quenching technique. The glass composition was modified by partial replacement (10 mol%) of CaO with MgO or ZnO. Net setting time, compressive and flexural properties, and in vitro rat dental pulp stem cells (rDPSCs) viability were examined for the prepared GICs and compared to a commercial GIC.Results The experimental GICs set more slowly than the commercial product, but their extended setting times are still within the maximum limit (8 min) specified in ISO 9917-1. Compressive strength of the experimental GIC was not increased by the partial substitution of CaO with either MgO or ZnO, but was comparable to the commercial control. For flexural properties, although there was no significance between the base and the modified glass, all prepared GICs marked a statistically higher flexural strength (p<0.05) and comparable modulus to control. The modified cements showed increased cell viability for rDPSCs.Conclusions The experimental GICs modified with MgO or ZnO can be considered bioactive dental materials.

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Section: Discussionmentioning

confidence: 99%

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

et al. 2015

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“…After the formation of stable nuclei, crystallization taking place by growth of a new crystalline phase. The nucleation and crystallization parameters of glasses are very significant in the preparation of glass-ceramics with desired microstructures and properties (Abo-Mosallam, 2009). Simmons, et al, 1982; studied the effect of fluorine content and its source on the crystallization of MAS materials.…”

Section: Machinable Glass Ceramicmentioning

confidence: 99%

Synthesis and Sintering Studies of Magnesium Aluminum Silicate Glass Ceramic

Durrani¹,

Hussain²,

Saeed³

et al. 2012

Sintering of Ceramics - New Emerging Techniques

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“…6 The bending strength and the microhardness, exceeding 100 MPa and y6 GPa respectively, are also typical of dense glass ceramics employed for building applications or for dental restoration. 6 In particular, the microhardness is higher than that reported by Abo-Mosallam et al 18 for glass ceramics based only on combeite. …”

Section: Characterisation Of Larger Glass Ceramic Samples and Possiblmentioning

confidence: 80%

Sintered silicophosphate glass ceramics from MBM ash and recycled soda–lime–silica glass

Bernardo¹,

Bingham²

2011

Advances in Applied Ceramics

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Meat and bone meal ash, mixed with recycled soda-lime-silica glass and small amounts of additives, was successfully valorised in the processing of sintered glass ceramics, after melting and forming two calcium phosphate glasses. Sintering was applied to fine powders (,37 mm) at temperatures of 700-1070uC for 0?5-2 h, after very rapid heating (40uC min 21 ). Mixtures with small additions of CaO and CaF 2 led to fluorapatite-wollastonite glass ceramics, which retained a significant porosity even at 1070uC, due to the delay in viscous flow caused by rapid crystallisation. This feature was exploited for strong open celled macrocellular glass ceramics, obtained by sintering glass powders mixed with polyethylene sacrificial templates. Mixtures with small additions of CaO and Na 2 O led to dense and strong combeite glass ceramics (bending strength, .100 MPa), sinterable at particularly low temperatures (800uC). Both porous and dense glass ceramics could be exploited as low cost and high strength materials, or even as biomaterials, due to the biocompatibility of the crystal phases.

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Formulation and characterization of glass–ceramics based on Na2Ca2Si3O9–Ca5(PO4)3F–Mg2SiO4-system in relation to their biological activity

Cited by 20 publications

References 23 publications

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

Synthesis and Sintering Studies of Magnesium Aluminum Silicate Glass Ceramic

Sintered silicophosphate glass ceramics from MBM ash and recycled soda–lime–silica glass

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