The effect of layered double hydroxide on fluoride release and recharge from a commercial and an experimental resin varnish

Tejani, Tameeza Hassanali; Milosević, A; Patel, Mukesh R.; Gillam, DG

doi:10.1016/j.dental.2021.10.002

Dental Materials

2022

DOI: 10.1016/j.dental.2021.10.002

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The effect of layered double hydroxide on fluoride release and recharge from a commercial and an experimental resin varnish

Tameeza Hassanali Tejani

A Milosević

Mukesh R. Patel

et al.

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2025

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Cited by 1 publication

References 21 publications

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Memory Effect of Double Oxides Compared to Simple Ion Exchange for Controlled Fluoride Ion Capture and Release

Alazreg,

Tadić,

Egelja

et al. 2025

Materials

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A layered double hydroxide (LDH) containing Mg and Al was synthesized from a nitrate solution using a coprecipitation method. The resulting material exhibited a homogeneous structure, which, upon calcination at 450 °C, was converted into a layered double oxide (LDO). When rehydrated in a fluoride-containing aqueous solution, the original hydroxide structure was successfully regenerated, demonstrating the LDH’s memory effect. During this transformation, fluoride anions from the solution were incorporated into the interlayer galleries to maintain electroneutrality, as confirmed by energy-dispersive X-ray spectroscopy (EDS) analysis. Separately, the process was tested in the presence of ethanol, which significantly enhanced the incorporation of fluoride ions into the interlayer spaces. The material’s potential for controlled fluoride release was evaluated by monitoring its release into demineralized water. For comparison, a simple ion-exchange process was carried out using the as-synthesized MgAl LDH. The memory effect mechanism displayed a notably higher fluoride incorporation capacity compared to the ion-exchange process. Among all the specimens, the sample reconstructed in the presence of ethanol exhibited the highest fluoride ion content. Fluoride release studies revealed a two-phase pattern: an initial rapid release within the first three hours, followed by a substantially slower release over time.

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Memory Effect of Double Oxides Compared to Simple Ion Exchange for Controlled Fluoride Ion Capture and Release

Alazreg,

Tadić,

Egelja

et al. 2025

Materials

View full text Add to dashboard Cite

show abstract

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The effect of layered double hydroxide on fluoride release and recharge from a commercial and an experimental resin varnish

Cited by 1 publication

References 21 publications

Memory Effect of Double Oxides Compared to Simple Ion Exchange for Controlled Fluoride Ion Capture and Release

Memory Effect of Double Oxides Compared to Simple Ion Exchange for Controlled Fluoride Ion Capture and Release

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