الفهرس 
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Abstract
This in-vitro study represented to evaluate nanoleakage and shear bond strength of different adhesive systems applied on dentin surface after different water storage periods and to correlate between them. Regarding shear bond strength, twenty-four freshly extracted human molars were utilized for shear bond strength. For each tooth the occlusal surface was trimmed until mid-coronal dentin was exposed, then the teeth were sectioned bucco-lingualy to produce forty eight samples.