Effect of thermal aging procedure on the microhardness and surface roughness of fluoride containing materials

Abstract

Aim: The aim of this in vitro study was to evaluate the thermal aging effect on microhardness and surface roughness of fluoridecontaining restorative materials.Material and Methods: In this study, a bioactive material (Activa Bioactive Restorative, Pulpdent, Watertown, MA, USA), a giomer(Beautifil II, Shofu, Kyoto, Japan), a nanohybrid composite (Charisma Smart, Heraeus Kulzer, Germany), a resin-modified glassionomer (Ionoseal, VOCO, Germany), and a bulk-fill glass-hybrid material (Equia Forte, GC, Tokyo, Japan) were used. 10×2 mm discswere prepared (n=10) and then polymerized. Only for bulk-fill glass-hybrid specimens, one layer of coat was applied on top surfacesand light cured. Before and after thermal aging procedures, initial and final surface roughness and microhardness values wereevaluated. One-Way ANOVA test was used for the statistical analysis (p0.05). After thermal aging whenthe bottom surface of Equia Forte compared to Activa Bioactive and Beautifil II in terms of microhardness values, a staticticalsignificant difference was observed (p