چكيده لاتين :
Introduction: A few studies have investigated the effect of saliva contamination of cured or uncured adhesive systems. The aim of this study was to compare the effect of different decontamination methods of uncured bonding system on the shear bond strength of composite to enamel and dentin.
Materials & Methods: In this in vitro experimental study, 80 extracted sound human teeth, 40 premolars and 40 central incisors, were selected for dentin and enamel specimen preparations respectively. Within each of the two test groups, the teeth were randomly subdivided into five subgroups. The materials used consisted of Single Bond (3M) and Z250 (3M). Except group 1 (Control), in groups 2-5, uncured adhesive was contaminated with saliva (20s). Decontaminating procedures were: drying and bonding re-application (Group 2), rinsing, blotdrying and rebonding (Group 3), etching, rinsing, blot drying and rebonding (Group 4), and similar to group 4 without bonding reapplication (Group 5). After light curing, composite resin was inserted on treated surfaces and cured. The results were subjected to one way ANOVA and Tukey HSD tests. Results: Group 5 (etching, rinsing,blot drying) significantly showed lower bond strength to both enamel and dentin surfaces in comparison to other groups (P<0.05).
Conclusion: When the adhesive was re-applied, all decontamination methods in this study seemed sufficient to decrease the adverse effect of saliva.
