With today’s modern materials and techniques, anyone can have beautiful white teeth. Teeth whitening is a very popular option. There are many types of whitening systems available. The effectiveness of whitening depends on the type and concentration of whitening solution that is applied to the teeth and the length of time that the solution remains in contact with the teeth. Over-the-counter whitening systems are often low concentration or don’t contact the teeth well enough for predictable results. Your dentist can make impressions of your teeth that would be used to fabricate precisely fitted whitening trays. This ensures that the whitening solution applied to the teeth gets where it needs to and stays there to whiten the teeth. The whitening solutions available to dental offices is highly concentrated and should only be used with custom-made trays and under your dentist’s supervision. You should have a thorough examination before any whitening is attempted to treat any tooth decay or gum disease. Every individual has a limit to how much their teeth will whiten. Some stains are very difficult or impossible to remove completely. Whitening touch-ups are usually needed every 6-12 months to maintain the results. In cases with heavy staining porcelain veneers may be a good option following whitening.