The research in the field of esthetic and restorative dentistry led to the achievement of the long sought dream of virtually bonding any type of material to the tooth surface. The advances in the restorative materials and bonding techniques have changed the concept of "Extension for prevention" as "Restriction with conviction." The purpose of writing this book is to summarize all information available on this topic under a single text book, to making it convenient for under graduate as well as post graduate students of dentistry.