So you cannot really fault those people who rush into having these procedures. And if you are rushing into having your own sessions with your favorite dentist or you know someone who is planning to, it's best to hit the brakes first. These procedures are not for everybody; there are some restrictions and once you have checked these then you can always retry the services of teeth whitening. Extrinsic tooth stains forms in the enamel while for the most part, intrinsic stains that show trough the enamel occur in the dentin. First, the tooth enamel is a highly mineralized very hard part of the tooth composed of strand of rod-like crystalline materials. These rods while very tightly packed have microscopic gaps in between them. This agent may not be as fast acting but it is far gentler and would likely be recommended by your dentist. Depending also on your condition, the concentration of carbamide peroxide in your bleaching tray could be lowered by your dentist to insure comfort as the teeth is being bleached. There are many cases where the staining is deep and for the meantime intractable. The bleaching gel is then applied to the teeth and then rinsed off after at least 15 minutes after which another application of the bleaching gel will be applied and kept in the mouth for approximately the same period of time. Additional application of fresh bleaching gel could be opted depending on the development of the treatment and how the teeth have whitened. Whitening strips and gels Gels are popular solutions for teeth whitening. These are clear gels that contain a good concentration of peroxide- that main ingredient that facilitates teeth whitening. These gels are often applied to the surface of the teeth with the use of a small brush. Most of the gels that are available in the market will call for you to apply these gels at least twice a day and this should go on for the next 2 weeks. This can be used before and after using the teeth whitening toothpaste. The use of this product will limit the sensitizing effects. What are listed above are some things that should be kept in mind when looking for a teeth whitening toothpaste. This is totally different from your ordinary toothpaste, and as such shopping for the product requires special considerations as well.