Dental Bleaching- Part 1: Causes of Teeth Discolorations

Over the years the concept of a “perfect smile” has gained more and more importance, with many people desiring straight and light-colored teeth. Tooth whitening has become a veritable means to achieve that exquisite smile. Discoloration of teeth can be attributed to various etiologies, such as hereditary, related to patient behavior, age, and disease, or iatrogenic; to name a few. The outcome of bleaching procedures is also very dependent on the nature of the discolorations. Intrinsic discolorations are incorporated into the tooth structure whereas extrinsic discolorations are attached to the tooth surface. Both the intrinsic and extrinsic discolorations may exist in combination and can affect enamel, dentin, or the pulp.