Shear Bond Strength and Microleakage of Pit and Fissure Sealants Placed after Saliva-Contaminated Etched Enamel

Saliva contamination of etched enamel before sealant application is the most common reason for failure fissure sealants, thus affecting effect caries prevention. This study aimed to evaluate shear bond strength (SBS) and microleakage resin-based on saliva-contaminated after rinsing, re-etching, applying universal adhesive. Fifty human third molars were sectioned into 2 parts embedded in acrylic resin obtained 100 samples. The samples randomly assigned 5 groups: 1, etching; 2, etching + contamination; 3, rinsing; 4, contamination+ re-etching; 5, Each group was divided subgroups: 24 h storage 5000× thermocycling. After measuring SBS, mode analyzed. In an additional 15 teeth, tested using dye penetration method. Three more teeth used scanning electron microscope (SEM) observation surface morphology each group. adhesive had significantly higher mean SBS storage, while re-etching better etching, etching+ groups showed least microleakage. SEM reveals considerable variations appearance within groups. Re-etching or can achieve satisfactory results. Considering less operative steps shorter chair time, recommended a pediatric patient if saliva-contamination happened application.