5Įxtrinsic stains commonly result from an accumulation of colored compounds on enamel.

Tooth discolorations are typically classified as extrinsic, intrinsic, or a combination of both types. Tooth (and dental) discoloration are terms used to describe any change in the color or translucency of a tooth, 1 as well as discoloration in multiple teeth or the entire dentition. Numerous over-the-counter (OTC) whitening products (e.g., strips, gels, rinses, chewing gums, or paint-on films) are also widely available for self-application at home. Another common approach is at-home whitening with custom-fitted trays, which patients use to apply professional-strength bleaching gel (for use at night or during the day).

1-3 Professionally administered (in-office) tooth whitening, also known as dental bleaching, remains a popular esthetic procedure and can be performed using a wide range of techniques and application protocols. For some time, there has been consistent consumer demand for whiter, brighter teeth and an attractive smile.

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