Teeth whitening lightens teeth and helps to remove stains and discoloration. Teeth Whitening is among the most popular cosmetic dental procedures because it can greatly improve how your Teeth looks. Tooth whitening is most effective on surface (extrinsic) stains.
There are two main types of whitening procedures. Vital whitening is performed on teeth that have live nerves. Non-vital whitening is done on a tooth that has had root-canal treatment and no longer has a live nerve.
The most common type of vital tooth whitening uses a gel that is applied directly to the tooth surface. This product contains some form of hydrogen peroxide.
Tooth whitening can be done in the dentist’s office or at home. In-office whitening allows your dentist to use a more powerful whitening gel. A specialized light or laser activates the gel and allows bleaching to happen faster.
In-office whitening usually takes 30 to 90 minutes. You will need 1 to 3 appointments. The number will depend upon the method used, how severe your stains are and how white you want your teeth to be. Different types of stains respond differently to the treatment.
First, your dentist will apply a substance that covers and protects the gums around the teeth. Then, the whitening agent will be placed on the teeth.
Some whitening agents are activated by a laser light, special lights or by the heat from these lights. After the whitening agent is applied, the dentist will shine the light on your teeth. If they are badly discolored, your dentist may suggest that you continue the bleaching process at home for a few days or weeks.
For in-home whitening, your dentist will take impressions of your upper and lower teeth and will make custom mouthpieces to fit you. The mouthpiece needs to fit well. A close fit helps the whitening agent remain in contact with your teeth.
At home, you will fill each mouthpiece with a whitening gel your dentist provides. You will wear the mouthpiece for several hours every day. Many people achieve the amount of whitening they want within a week or two. However, you may need to wear the mouthpiece for four weeks or longer.
Whitening toothpastes are available as well. They contain abrasives that remove stains on the enamel.
Vital whitening may not improve the appearance of a tooth that has had root-canal treatment because the stain is coming from the inside of the tooth. If this is the case, your dentist will use a different procedure that whitens the tooth from the inside.
He or she will place a whitening agent inside the tooth and put a temporary filling over it. The tooth will be left this way for several days.
You may need this done only once, or it can be repeated until the tooth reaches the desired shade.
Whitening is not a permanent solution. The stains will come back. If you smoke or consume a lot of staining foods or drinks, you may see the whiteness start to fade in as little as one month. If you avoid these sources of staining, you may not need another whitening treatment for 6 to 12 months.