As techniques and materials available to dentists have improved over the past few decades, better and more conservative restorations have become possible.Extensive preparation and tooth destruction have given way to a genuine concern for the preservation of the tooth structure.As the populations dental awareness has grown, so its demand for a natural (or preferably) supernatural smile. The one inescapable fact in the study of tooth whitening is that patients are very eager to have brighter and white smiles.