Glass Ionomer Cement (GIC) Surface Hardness after Addition of 5% Silica from Sea Sand

Abstract

Glass ionomer cement (GIC) is a restorative material that can release flour so as to prevent further caries, biocompatible, translucent, and anti-bacterial, low tensile strength, GIC has limitations that is short working time and cannot be used in areas of teeth that have large masticatory pressure, susceptible to fracture toughness. The addition of silica in GIC is one aspect that needs to be considered because silica has high hardness properties. The source of silica can be synthesized from sea sand which has a silica content of about 98%. This study aims to determine the difference in surface hardness from conventional GIC and GIC by the addition of 5% silica from sea sand. Cylinder-shaped specimens with a diameter of 5 mm and height of 2 mm, totaling 10 specimens, namely 5 conventional type II GIC specimens (control group) and 5 conventional GIC specimens with the addition of silica from sea sand (treatment group). Vickers Hardness Tester is used to measure the value of hardness. Data were analyzed using SPSS with unpaired t test. The results of the data show that there was no significant difference (p> 0.05) between the surface hardness of conventional GIC and GIC with the addition of silica from sea sand.