With the services of the pros, you can automatically get your set of white teeth in hours! So what can you expect from these teeth whitening services? If you choose this way, then you choose the fastest and the safest way of making your teeth. This is true of course, that you have chosen the right provider. Design differences for the mouthpiece trays. The mouthpiece trays that are available for supervised whitening sessions are considered as more reliable as compared to the ones that are available over the counter. The basis for this is simple. At least with the dentist-supervised procedures, the dentist can visit the person's home and can customize the site of the mouthpiece tray. Is In-Office Teeth Whitening Right For You If you are looking for the quickest way to whiten the teeth, then you may want to consider the in-office whitening. Under this procedure the whitening product, like the gel is applied to the teeth. And when used under the dentist-supervised procedure, this form of bleaching is used as complemented by a special light or the laser. And through continuous use of around two to four weeks, there will be changes in the color of the teeth. Right now there are advances in the technology that allows for the teeth to become whiter at a shorter period of time. These new products contain blue covarine. So how safe is the teeth whitening toothpaste? Teeth whitening gels, strips, pens, gurgles and other treatments are generally designed for self help and the mix is generally very mild. This is not only done to avoid problems but to market the products most effectively. Highly successful products depend much on acceptability, endorsement by word of mouth and repeat sales. 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!