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. 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. And in some cases, these veneers can also replace the dental crown. If these veneers are selected for use in dental care and for cosmetic reasons, it is important that you must know a thing or two about these products. One thing that should be accepted is the fact that these dental veneers are relatively thin. People with tooth and gums hypersensitivity may undergo a different regimen or may be given home treatment kits for the patient to use though due to the patients hypersensitivity, the treatments and dosages are mild and will therefore take a longer period of time. Patients that have staining that are yet intractable may not be good candidates as there are stains that are resistant to bleaches. But the main intent of this product is primarily for teeth whitening and this is because of its main ingredient- the hydrogen peroxide. Just like the ordinary mouthwash, you just need to swish the waster around the mouth for the next 60 seconds, and this should be done at least twice a day. Use this product for the next 12 weeks and you will see the results that you are looking for. Professional Laser Teeth Whitening Services Dissected Having yellow teeth is no longer a problem, well at least according to many dental practitioners. There are a number of professional cleaning and teeth whitening services, and it's now easy for you to change from that person with yellow teeth to that person with shiny white set of teeth.