Evaluation of Calcium Fluoroaluminosilicate Based Glass Ionomer Luting Cements Processed Both by Conventional and Microwave Assisted Methods

Abstract

Calcium fluoroaluminosilicate glasses (CAS) are used in the formulation of glass ionomer cements for dental applications. However, the cements obtained from CAS glasses were found to be radiolucent. In this study, the influence of substituting Zn, Sr and Mg for Ca of CAS glasses was investigated with respect to the structure and setting characteristics, mechanical properties, and radiopacity of cements designed for luting applications. Three glass compositions based on substitution of Zn, Sr and Mg for Ca at 1:1 molar ratio was synthesized. They were coded as the G 021 (Ca: Zn), G 022 (Ca: Sr), G 023 (Ca: Mg). G 021 and G 022 glasses were processed by conventional melt quench route, whereas G 023 was processed by microwave melt-quench route. Each glass was then mixed with Fuji Type I GIC liquid in order to evaluate the properties of novel cements at different powder/liquid ratios. X-ray diffraction and Fourier Transform-Infrared spectroscopy analysis confirmed the OPEN ACCESS Technologies 2015, 3 59 structure of the processed glasses. The average particle size of the processed glass powders was within specification limits for luting applications (<15 μm). The substitution of Zn, Sr and Mg for Ca at 1:1 molar ratio increased the reactivity of the respective glasses. This has been reflected in their respective setting characteristics and mechanical properties. The optimal combination of setting time, strength and radiopacity for the cements examined here was shown by G 022 cements. The microwave melting can be utilized for processing ionomer glasses as it did not alter the structure and properties of G 023 cement.

Performance evaluation of carbon quantum dots impregnated glass ionomer cement to avoid peri-implant disease

“…Negative charges were neutralized by monovalent and bivalent cations such as Na + and Ca 2+ [32]. In GIC-CQD, infrared spectral bands are broad due to the amorphous nature of the glass particles and CQDs [33]. The addition of CQDs to GIC did not affect the peaks due to the CQDs amorphous carbon phase.…”

Modifications of polyalkenoic acid and its effect on glass ionomer cement

“…[49][50][51] Microwave-assisted polymerization is also effective for the synthesis of polyalkenoic Review Materials Advances acid. 52,53 Compared to conventional free radical polymerisation, living radical polymerization techniques help to achieve proper control over the molecular weight and the molecular weight distribution of the polymer. 54 Here polymer radicals do not terminate via an inherent termination reaction and polymerization continued anytime by the addition of monomers.…”