The effect of the polishing procedure and surface sealant application on the fluoride release of different restorative materials

Abstract

Aim: The aim of this study is to evaluate the effect of the polishing procedure and surface sealant application on the fluoride release of different restorative materials. Materials and Methods: The study groups composed of five different restorative materials: Beautifil II, GCP Glass Fill, Amalgomer CR, Zirconomer, and Fuji IX GP. 30 disk-shaped specimens (8 mm diameter × 2 mm thickness) were prepared from each material. Each group was divided into three subgroups according to the finishing procedure: Mylar strip, polishing with Super-Snap discs, polishing with Super-Snap discs followed by G-Coat Plus application. The amount of fluoride released was measured using a fluoride ion-selective electrode and ion analyzer after 24 h followed by measurement on days 3, 7, 15, 21, and 28. Surface analysis of the materials was performed with scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS). The data were statistically analyzed using repeated measure analysis of variance and the least significant difference test (P = 0.05). Results: The highest amounts of fluoride release were found during the first 24 h for all materials. The amounts of fluoride release revealed a significant decrease from day 1 to day 28 for each group (P 0.05). According to EDS data, the most percentage of oxygen was found in all materials. Conclusions: It might be concluded that polishing promoted a significant increase of fluoride release on glass ionomer-based materials, and the fluoride release of the restorative materials was not affected by applying G-Coat Plus.