Professional tooth whitening in a dental office is the preferred whitening method because even though stronger agents are applied, the rest of the mouth, including the gums, is protected from these materials. The best whitening systems feature a buffer in the gel that protects the tooth enamel from damage, are extremely effective, and can transform teeth in a single office visit. Your teeth can literally brighten up to 7 shades in about an hour.
In-office whitening affects only the front eight teeth and is a great jump start for take-home whitening, which is always part of an effective whitening program. Your dentist is best qualified to handle any issues that may arise from whitening treatments, such as tooth sensitivity. Today most tooth sensitivity cases are easily managed with proper sensitivity toothpaste or fluoride treatments.
Tooth whitening can last for one or more years, depending on how well you take care of your teeth, and if you are following up regularly with a home whitening product for regular maintenance.