FAQ - Teeth Whitening
What is tooth whitening?
Tooth whitening can be a highly effective way of lightening the natural colour of your teeth without removing any of the tooth surface. It cannot make a complete colour change; but it will lighten the existing shade.
Why would I need my teeth whitened?
There are a number of reasons why you might get your teeth whitened. Everyone is different; and just as our hair and skin colour vary, so do our teeth. Very few people have brilliant-white teeth, and our teeth can also become more discoloured as we get older.
Your teeth can also be stained on the surface through food and drinks such as tea, coffee, red wine and blackcurrant. Smoking can also stain teeth.
Calculus or tartar can also affect the colour of teeth. Some people may have staining under the surface, which can be caused by certain antibiotics or tiny cracks in the teeth which take up stains.
What does tooth whitening involve?
Professional bleaching is the most common form of tooth whitening. Your dentist will be able to tell you if you are suitable for the treatment, and will supervise it if you are. First the dentist will put a rubber shield or a gel on your gums to protect the soft tissue. They will then apply the whitening product to your teeth, using a specially made tray which fits into your mouth like a gum-shield.
The 'active ingredient' in the product is usually hydrogen peroxide or carbamide peroxide. As the active ingredient is broken down, oxygen gets into the enamel on the teeth and the tooth colour is made lighter.
What other procedures are there?
There is now laser whitening or 'power whitening'. During this procedure a rubber dam is put over your teeth to protect the gums, and a bleaching product is painted onto your teeth. Then a light or laser is shone on the teeth to activate the chemical. The light speeds up the chemical reaction of the whitening product and the colour change can be achieved more quickly using this procedure. Laser whitening is said to make teeth up to five or six shades lighter.
How long does this take?
Your dentist will need to assess your teeth to make sure that you are suitable for the treatment. Once it has been agreed, this procedure usually takes about one hour.
Can a single tooth which has been root filled be whitened?
Sometimes. Many dead teeth go discoloured after a root filling. If the tooth has been root treated, the canal (which previously contained the nerve) may be reopened. The whitening product is applied working from the inside to whiten the tooth.
When might tooth whitening not work?
Teeth whitening can only lighten your existing tooth colour. Also it only works on natural teeth. It will not work on any types of 'false' teeth such as dentures, crowns and veneers.
If your dentures are stained or discoloured visit your dentist and ask for them to be cleaned. Stained veneers, crowns or dentures may need replacing; again ask your dentist.
How can I look after my teeth once they have been whitened?
You can help to keep your teeth white by cutting down on the amount of food and drink you have that can stain teeth. Don't forget, stopping smoking can also help prevent discolouring and staining.
We recommend the following tips to care for your teeth:
- brush your teeth twice a day with a fluoride toothpaste.
- cut down on how often you have sugary foods and drinks.
- visit your dentist regularly, as often as they recommend.
