The teeth whitening procedure typically lasts between 1-2 hours. This duration may vary depending on the type of whitening performed by the dentist and the techniques used.

The teeth whitening procedure can generally lighten the color of the teeth by 2 to 8 shades. However, this number varies based on personal factors and the method used. If you are targeting a specific shade of whiteness, it would be a good idea to consult with your dentist to determine the most suitable whitening method.