Impedance as a measure of setting reaction in glass ionomer cements

Moguš‐Milanković, Andrea; Sklepić, Kristina; Čalogović, Marina; Marciuš, Marijan; Prskalo, Katica; Janković, Bernard; Tarle, Zrinka

doi:10.1016/j.jnoncrysol.2014.02.012

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…GIC set by neutralization after the mixing of aluminosilicate glass particles, containing phosphate and fluoride, with a polyacid solution. From previous studies 18 19 20 21 22 23 , two steps in this diffusion-controlled reaction have been identified. During the earlier stages of setting, the acid partially dissolves the glass particles resulting in the release of metal ions 24 25 , for example calcium, strontium, and aluminium 25 .…”

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confidence: 99%

How mobile are protons in the structure of dental glass ionomer cements?

Benetti

Jacobsen

Lehnhoff

et al. 2015

Sci Rep

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The development of dental materials with improved properties and increased longevity can save costs and minimize discomfort for patients. Due to their good biocompatibility, glass ionomer cements are an interesting restorative option. However, these cements have limited mechanical strength to survive in the challenging oral environment. Therefore, a better understanding of the structure and hydration process of these cements can bring the necessary understanding to further developments. Neutrons and X-rays have been used to investigate the highly complex pore structure, as well as to assess the hydrogen mobility within these cements. Our findings suggest that the lower mechanical strength in glass ionomer cements results not only from the presence of pores, but also from the increased hydrogen mobility within the material. The relationship between microstructure, hydrogen mobility and strength brings insights into the material's durability, also demonstrating the need and opening the possibility for further research in these dental cements.

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confidence: 99%

How mobile are protons in the structure of dental glass ionomer cements?

Benetti

Jacobsen

Lehnhoff

et al. 2015

Sci Rep

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“…After 12 min from the setting initiation the real and imaginary parts of permittivity exhibit a sharp decrease after which they continue to decrease slowly for another 20 min. Such a sudden “break” was also detected in our previous study of the electrical conductivity during the setting of the glass ionomer cements . The origin of this transition was explained by the structural transformations during setting and the conductivity before and after the break was attributed to the electrical transport within the slurry structure in the initial stage and in the solidified cement structure, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Such a sudden "break" was also detected in our previous study of the electrical conductivity during the setting of the glass ionomer cements. 21 The origin of this transition was explained by the structural transformations during setting and the conductivity before and after the break was attributed to the electrical transport within the slurry structure in the initial stage and in the solidified cement structure, respectively. However, the cause of this phenomenon is still puzzling due to at least two reasons.…”

Section: Resultsmentioning

confidence: 99%

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New Insights into the Setting Processes of Glass Ionomer Cements from Analysis of Dielectric Properties

et al. 2015

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The setting processes in the commercial glass ionomer cement (Fuji IX Fast) and resin modified glass ionomer cement (Fuji II LC) were investigated by the dielectric spectroscopy. The changes in the real and imaginary parts of the dielectric permittivity [e*(x)] as well as dielectric loss (tan d) with time for Fuji IX Fast show several distinct regions which are related to the different stages of the acid-base reaction. Interestingly, the first stage that lasts for approximately 12 min terminates with a sharp decrease in dielectric parameters which is most probably related to the instantaneous (micro)fracturing of the sample due to a rapid build-up of the shrinkage stress. On the other hand, evolution of the dielectric properties during the setting of Fuji II LC indicates fast reaction in the initial stage (within few minutes) followed by the slow gradual change as a result of the competing nature of the acid-base reaction and lightactivated polymerization.

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“…31,32) Electrochemical impedance spectroscopy (EIS) is one of the major techniques for the in situ monitoring of hydration process of cement-based materials. [33][34][35] In the present study, we performed frequency-dependent impedance spectroscopy for the in situ monitoring of hydration process of various compositions. Furthermore, the cytotoxicity of various compositions was investigated by performing XTT assays, and the results were compared with those of the commercial dental cement, ProRoot MTA.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Hydration Process and Biocompatibility of Calcium Silicate-Based Experimental Portland Cements

Lim¹,

Guk²,

Singh³

et al. 2019

J. Korean Ceram. Soc

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In this work, the hydration process and cytotoxicity of lab-synthesized experimental Portland cements (EPCs) were investigated for dental applications. For this purpose, EPCs were prepared using laboratory-synthesized clinker constituents, tricalcium silicate (C 3 S), dicalcium silicate (C 2 S), and tricalcium aluminate (C 3 A). C-A was prepared by the Pechini method, whereas C 3 S and C 2 S were synthesized by solid-state reactions. The phase compositions were characterized by X-ray diffraction (XRD) analysis, and the hydration process of the individual constituents and their combinations, with and without the addition of gypsum, was investigated by electrochemical impedance spectroscopy (EIS). Furthermore, four EPC compositions were prepared using the lab-synthesized C-A, C 3 S, and C 2 S, and their hydration processes were examined by EIS, and their cytotoxicity to HPC and HIPC cells were tested by performing an XTT assay. None of the EPCs exhibited any significant cytotoxicity for 7 days, and no significant difference was observed in the cell viabilities of ProRoot MTA and EPCs. The results indicated that all the EPCs are sufficiently biocompatible with human dental pulp cells and can be potential substitutes for commercial dental cements.

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Impedance as a measure of setting reaction in glass ionomer cements

Cited by 8 publications

References 31 publications

How mobile are protons in the structure of dental glass ionomer cements?

How mobile are protons in the structure of dental glass ionomer cements?

New Insights into the Setting Processes of Glass Ionomer Cements from Analysis of Dielectric Properties

Investigation on Hydration Process and Biocompatibility of Calcium Silicate-Based Experimental Portland Cements

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