The impact of sodium fluoride addition to an adhesive system on micro tensile bond strength of ceramic occlusal veneer

) were obtained from 20 upper first premolars, with each tooth yielding four sticks. The teeth were sectioned using an Isomet saw to expose deep dentin, and Vita Enamic occlusal veneers were fabricated and cemented prior to sectioning. The specimens (n = 20) were assigned to two adhesive groups: a control (unmodified adhesive) group and a NaF-containing adhesive group. Each group was further subdivided into two subgroups, which were tested after 24 h and 6 months of storage in artificial saliva at 37 °C. Microtensile bond strength was measured using a universal testing machine. Repeated-measures ANOVA revealed no significant effect of adhesive type or storage duration on tensile bond strength. Independent t test showed a highly significant difference between subgroups I-B and II-B, with no significant differences in other comparisons. Mixed failures predominated across all groups, indicating balanced interfacial and cohesive properties, and EDX confirmed successful fluoride incorporation. Incorporation of sodium fluoride into the adhesive system did not alter immediate dentin bond strength but reduced long-term durability of ceramic partial-coverage restorations.