clipped from: www.makeoversmile.com 
Veneers can straighten, lengthen, and whiten teeth to provide your desired smile and bite. It is a thin, strong, porcelain restoration, made just for you, bonded to a prepared tooth. Veneers cover part or all of the biting surface as well as the visible part of the tooth. Veneers can create the smile you have always dreamed about.
Tooth whitening or bleaching is one of the most popular areas of cosmetic dentistry. Even subtle changes in shading can make someone look years younger. Several factors can contribute to the darkening of teeth, including the effects of age, certain foods and drinks, smoking, and medications.