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. You can consider this option as one of the most expensive solutions towards white teeth. You will need to have at most four treatments to get the results that you want, and each treatment will cost you at least $600. Of all these options available, what could be best for your needs? In the end, the budget and your convenience will serve as the two primary factors in shopping for teeth whitening solutions. Some stains though are not so easy to remove and may take longer treatment for the whitening agent to reach the dentine layer. For stubborn stains and uncomfortably dark shades in the teeth, self help may no longer suffice. Treatments could be done by a professional who could use custom bleaching trays, laser treatment, and in cases where discoloration is ugly, porcelain veneers could be applied including dental bonding. Another reason for its popular use is that while the strips are thin, usual bleaching trays are bulky that could aggravate jaw problems, trigger gag reflex and messier to wear and remove. These differences allow a person to do much of the normal activities with less interference. Still like most everything, there is a downside to teeth whitening strips. Carbamide peroxide although slower acting also works very much like a hydrogen peroxide. When in the mouth, carbamide peroxide breaks down into urea and hydrogen peroxide with hydrogen peroxide being the bleaching agent. The dentin on the other hand could also catch stains. Many stains when allowed for a long period of time could get into the dentin forming stains that could show through the enamel. If for example there are other serious concerns relating to the oral health condition, then the practitioner will not recommend outright teeth whitening procedure. Rather that person will be referred back to the dentist for proper assistance. If the pre-check reveals no problems, then the person will be up for the procedures related to teeth whitening.