A take-home product supervised by a dentist is the most popular whitening method. These products contain a lesser percentage of Cp or Hp than in-practice products and are worn in a tray overnight or during the day at home. A custom-fitted tray is made to hold the whitening product directly against the teeth while lessening its contact with the gums. Some products have fluoride added to help prevent or treat mild tooth sensitivities. The typical stains of ageing will whiten in seven to fourteen days when the tray is worn overnight.
* Over-the-counter (OTC) whitening products contain a small percentage of Hp or Cp. Caution should be used with these products as many contain an acidic solution that can wear away tooth enamel. OTC products use a bulky, one-size-fits-all tray to hold the product. Usually more product is swallowed than stays in the tray because of the trays poor fit against the teeth. It can take up to six months and the purchase of several kits to get whiter teeth. Flexible strips coated with whitening gel have recently been introduced as an OTC at-home tooth whitening method. The strips are worn on the front teeth and folded over to keep them in place. Results are reported to be noticeable after fourteen days and effective for 6 months.
* Over-the-counter whitening toothpastes contain a small percentage of Hp, Cp, or polishing ingredient. The toothpastes are effective in keeping teeth cleaner and whiter looking but some may be very abrasive. The harsh abrasive will wear away the enamel with repeated use gradually making the teeth look yellow. Whitening toothpastes remove surface stains and prevent new stains from building up. Whitening toothpastes however aren't in contact with the teeth long enough to remove internal stains. Ask your dentist about the safety and cavity protection of specific toothpastes before you buy.
How should I choose a teeth whitening method?
It is highly advisable to inform your dentist about your goals regarding teeth whitening. They can advise you about the most suitable method and also outline the procedure, likely results, side effects and address any questions you may have.