• First of all, the teeth can be covered with a build-up of dental plaque and tartar. These deposits become colored if a person drinks coffee, tea, red wine frequently. A simple cleaning and polishing of the teeth is enough to remove superficial stains, but not when the stain is lodged in the enamel and in the dentin of the teeth.
• The possible causes can be natural aging of the teeth, decay, the consumption of tobacco products, certain medications or too much fluoride at a young age.

Some facts :

• Some people respond better to whitening treatment than others.
• Those with yellowish-colored teeth usually respond better than those with brownish-colored teeth.
• Sometimes the teeth have a grayish color, which results from taking tetracycline at a young age to treat certain childhood illnesses or from taking minocycline used by adolescents and young adults to treat acne problems. These stains are more resistant to bleaching and in some cases it is unfortunately not possible to remove them completely.
• In addition, people whose anterior teeth have been restored with dental materials that have changed color over time will need to change them in order to have teeth of the same color.

The dentist insulates the teeth and protects the gums using a protective gel or a rubber dam.