The science behind Teeth Whitening

Teeth whitening occurs when Hydrogen Peroxide (H2O2) is exposed to the dentine of a tooth, which is directly under the enamel. When Hydrogen Peroxide penetrates through the enamel, pigmentation found in the dentine tube oxidizes, rendering a white finish which is reflected through the translucent enamel.
 

The hydrogen peroxide then breaks down into oxygen molecules. These molecules go into the tiny pores of the enamel and dentine, and break up the stains that block out the light. As the stains are broken into smaller and smaller pieces, more light passes through the teeth and makes them look lighter. Stains that are accumulated over time that are yellow to slightly brown produce the best results.
 

Teeth that are dark brown to blue-gray are the most difficult to bleach because the stain is deeply embedded into the tooth’s structure. These types of stains are usually caused by medications taken during the development of the teeth such as tetracycline.
 

Results will be seen within 60 minutes. The whitening procedure may last for up to two years – even longer in some cases, depending on personal habits. Periodic touch-up treatments are recommended for clients who frequently consume coffee or other staining foods and drinks or for those that use tobacco products.