Besides, the results, no matter how diligently done, will never equal to in-office whitening where the procedure is conducted and is professionally supervised by a dentist. All cosmetic enhancements are subjective to the person. While companies are aiming to give superior results every time and is continuously working at providing such, customers could sometimes fall on the side the unsatisfied. Take home bleaching agents (Professional Strength) Another option is to consider the professional strength bleach as recommended by many dentists. This option can come in two variants, the one with carbamide peroxide or the one with hydrogen peroxide. The bleaching formulation products will often come complete with the custom-fitted tray so that will be used by the dentist to get an impression of the teeth of the person. Though there may be some services that will fall under $500, but be reminded that these services rarely come. In many of these services, the most common method that is used is the light therapy. This therapy makes the bleaching process faster and more effective. It is said that this process can lighten the shade of the teeth 10 times more than other whitening agents. The strips on the other hand are thin strips that are coated with the gel fortified by hydrogen peroxide. These strips are also attached to the teeth twice a day. The strips should remain in your teeth for at least 30 minutes before these strips can be removed. The use of the strips should be done on a continuing basis for the next 2 weeks, same thing with the gels. And the differences between the two categories are assessed using the following measures: Composition and the strength of the bleaching agent used. It is an accepted fact that the over the counter medications and formulations will contain less concentration of the bleaching agent. In many products, the concentration will only reach up to 10 percent. The dentist or any professional is the one that will do the initial cleaning process. The dirt and the stains at the surface of the teeth will be removed, and will be primed up for the whitening session courtesy of the whitening toothpaste. Buy the desensitizing toothpaste. This is one good investment if you want to take teeth whitening seriously.