الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
The Aim of this study was : 1-To evaluate the in vivo bond performanceof lightand dual cure Nano-Bond dhesive systems by assessing the microtensile bond strength and the Nano leakage of class II resin composite restorations immediately and after three months aging periods. 2-To investigate whether the curing mode of Nano-Bond adhesive systems and dentin pretreatment could affect the bond degradation resistance of resin composite restorations.