Wear behavior of different materials used for pit and fissure sealing

Purpose: To evaluate the wear of different materials used for pit and fissure sealing applied with non-invasive and invasive preparation techniques. Methods: A total of 170 molar teeth were divided into two main preparation groups (non-invasive and invasive), each consisting of eight subgroups after a control group was separated for wear standardization. Eight subgroups included: nano-filled flowable composite (Filtek Ultimate Flow), nanohybrid flowable composite (GrandioSo Flow), micro-hybrid flowable composite (Majesty Flow), resin-based unfilled fissure sealant (ClinPro Sealant), resin-based filled fissure sealant (Fissurit FX), resin-based highly filled fissure sealant (GrandioSeal), giomer-based fissure sealant (BeautiSealant), and glass-ionomer-based fissure sealant (Fuji Triage) (n= 10). The materials were applied according to the manufacturers' instructions. The initial data were obtained for wear analysis. The specimens were subjected to 2-year thermocycling and brushing simulations. Final data were obtained, and the wear characteristics were evaluated digitally. Data were statistically analyzed (P < 0.05). Results: There were no significant differences in wear between the non-invasive and invasive application groups (P < 0.05). In comparison of the materials, flowable composites presented the lowest wear (0.15 +/- 0.13), and glass-ionomer-based fissure sealant presented the highest wear (0.66 +/- 0.32).