Professional teeth whitening is performed by a dental professional is because the whitening formula is much stronger than what is available over the counter. In-office teeth whitening has the power to remove deep set stains in the fastest amount of time possible, without damaging the tooth enamel or gums.
The yellow coloration seen in teeth comes from the dentin found below the surface of your teeth. If you want to effectively remove this discoloration, you will need a professional take home whitening kit that is also available at your local ‘ dental office whose whitening concentration is also much higher than what is available over the counter. Many offices provide at-home maintenance whitening included in the cost of the in-office procedure, so that you may better maintain your whiter smile in the comfort of your own home.
The problem with over-the-counter whitening products such as the whitening strips seen at your local convenient store is that the hydrogen peroxide concentration is much lower than the whitening gel used by your dental professional. This is why the whitening sessions take place in only 15 minute intervals rather than weeks as seen in products such as Crest Whitestrips. Over-the-counter products such as this will take a much longer period of time in order for you to see decent results.
Teeth whitening is considered to be a cosmetic procedure and is not covered by most insurance companies.