The Effect Of Silver Diamine Fluoride On Bond Strength of Universal Adhesive To Demineralized Dentin

Abstract

Aim: To evaluate the effect of silver diamine fluoride (SDF) on bond strength of universal adhesive to Sound and De-mineralized dentin. Materials and Methods: The 80 samples are divided into two main groups (40 teeth for each) according to the presence of the intervention (SDF); each main group is subdivided into two subgroups according to the substrate mineralization then moulded into self-cured acrylic resin with occlusal surface facing upward. The occlusal enamel is removed using wheel diamond stone under running water. Samples were wet ground against 600,800,1200 grit SC paper to obtain smooth occlusal surface. Half of the samples were immersed into lab made demineralizing solution to obtain dentin surface demineralization, then divided into 4 groups (n = 20), Group 1: Sound Dentin without SDF, Group 2: Demineralized Dentin without SDF, Group 3: Sound Dentin with SDF, Group 4: Demineralized Dentin with SDF. Microtensile bond strength was measured using Universal testing machine. Means and Standard deviation for each group were calculated, data were statistically analysed by Two-way ANOVA and Tukey Post Hoc test. Results: Results revealed that Group 1 and Group 3 have highest micro-tensile bond strength values with no statistically significant difference between them. Group 1 showed the highest statistically significant mean micro-tensile strength values than Group 2. Group 2 showed no statistically significant difference in values than Group 3. The least statistically significant micro-tensile strength value was recorded for Group 4.The different surface treatment used have statistically significant effect on the micro-tensile bond strength (P<0.001). In addition, it showed that there is a statistically significant effect of the dentin substrate mineralization, on the micro-tensile bond strength (P<0.001). The interaction between surface treatment and substrate was also statistically significant (P<0.005). Conclusion: Contamination of sound dentin surface by SDF does not affect bonding in case of using universal adhesive in etch and rinse mode. Treatment of caries affected dentin by SDF negatively affect bond strength in case of using universal adhesive in etch and rinse mode.