Research Information System
Clinical Dentistry and Research, vol.47, no.3, pp.97-106, 2023 (Peer-Reviewed Journal)
Background and Aim: This study aimed to investigate the long-term surface roughness, microhardness and biofilm formation of 4- different fluoride-releasing restoratives. Materials and Methods: A total of 192 specimens (n=48) were produced from: A Giomer (Beautifil II), a high-strength posterior glass ionomer (Amalgomer), a glass carbomer (Glass Fill), and a glass hybrid (Equia Forte Fil) restoratives. The specimens were further divided into four groups as: Group 1 (T0), experienced no thermocycling; Group 2, (T1), underwent 10,000; Group 3 (T2), 30,000; and Group 4 (T3), was subjected to 50,000 thermocycling. Then, specimens were analyzed for surface roughness (Ra) and microhardness (VHN) tests and biofilm formation using Streptococcus mutans. Data were analysed statistically (p< .05). Results: At T0, T1, and T2, Amalgomer and Glass Fill had the highest Ra, while Beautifil II had the lowest. At T3, Ra was similar among the groups (p = .626). Ra of the groups changed after thermocycling (p<.05), except Glass Fill (p = .068). The highest VHN was detected in Amalgomer, while Eqiua Forte Fil and Glass Fill had the lowest (p < .05) after thermocycling. VHN of Beautifill II and Amalgomer decreased (p < 0.01), Glass Fill increased (p < .001), and Eqiua Forte Fil remained unchanged (p = .505) after thermocycling. The lowest biofilm formation was seen at T0, and the highest was seen at T3 (p < .05) in all groups. Conclusion: Significant differences were found among the materials and thermocyclings regarding surface roughness, microhardness and biofilm formation.