Study on the fluoride-releasing ability of dental GIC materials in deionized water and artificial saliva environments

Abstract

Glass iononier cement (GIC) is a particular type of cement used in dentistry. One of the most critical properties of GIC is the ability to release fluoride, which can prevent recurrent tooth decay. This study simultaneously investigated the release of fluoride, the compressive strength, and the apparent density of three GICs in deionized water (DW) and artificial saliva (AS) environments. GICs with 3 different types of glass powders were used to study. Powder B (the original) was the glass powder based on the SiO₂-Al₂O₃,- CaF₂-AlPO₄-Na,A1F₆ system, powder HA5 was powder B supplemented with 5 wt. % hydroxyapatite powder (HA), and powder Si₂ was powder B surface-treated w ith 2 wt. % silane JH-S69. The results of this study showed the amount of fluoride ion (F ) released during 28 days in AS was lower in comparison to the DW environment, and the rate slowed down significantly after 1 d.