Teeth Whitening Advantages Of Over-the-Counter Teeth Whitening The main advantage of using over the counter whitening is the cost. A price that ranges between $10 to $35 against supervised tooth whitening that costs from $600 to $1000 and in some cases, beyond the K mark is indeed attractive not to mention the same teeth whitening results. After the initial consultation, the process of getting an appointment, finding the time and actually sitting in the dentist's chair is not always convenient besides there are a lot of conditions where it is actually more practical to get a teeth whitening kit and apply it at home where the person could save enormously on fees and time. While the darkening of the teeth as it ages is mainly due to the changes in the teeth's mineral structure, the enamel at the same time gets less porous and less shiny making it more susceptible to stains from bacterial pigments, medication, tobacco, wine, coffee, tea and food. No matter how good the hygiene of a person is, the teeth simply ages. The reason for this may lie in the amount of time that the water enriched with peroxide is in contact with the teeth. For the rinse, the peroxide is in contact with the teeth for 2 minutes a day. Contrast this with the contact that happens with the teeth and the peroxide for strips, where the strips need to be attached to the teeth for as much as 30 minutes! It will always retain its color. If these are present in the range that show when a person smiles, chances are whitening the teeth through the do it yourself regimen will result to uneven teeth color. Professional supervision is needed in such cases. Finally, see your dentist first. This is especially true if you have suffered teeth trauma in the past and have gums that are easily irritated. The nice thing is that manufacturers and cosmetic producers and practitioners are all aware of these needs. And that they swamp the market with goods and services that can address this concern. And the teeth whitening paste is one answer offered and being tried by millions in order to whiten their teeth.