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, just as our hair and skin colour vary, so do our teeth. Very few people have brilliant white teeth and our teeth do get 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 have staining under the surface which can be caused by certain antibiotics or tiny cracks in the teeth which can take up stains.  

What does teeth 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. The dentist will show you how to 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.  

How long does this method take ?  

The total treatment can usually be done within three to four weeks. Your dentist will need to make a mouthguard and take impressions for this at the first appointment. Once your dentist has started the treatment you will need to continue the treatment at home. This means regularly applying the whitening product over about a week , usually overnight.  

How much does tooth whitening  cost ?  

You cannot get tooth whitening on the NHS and all tooth whitening must be done privately.  

How long will my teeth stay whiter ?  

The effects of whitening can last for up to three years, however this will vary from person to person. The effect is less likely to last as long if you smoke or eat or drink products that stain your teeth. Ask the dentist for their opinion before you start treatment.  

What are the side effects ?

Some people find that their teeth become sensitive to cold during or after the treatment, others report discomfort in the gums, a sore throat or white patches on the gum line. These symptoms are usually temporary and should disappear within a few days or after the treatment has been completed.  

What about ‘over- the- counter, shop bought’ home kits ?  

Home kits may seem cheaper but there are many good reasons why they are NOT recommended.  

Tooth whitening is a complicated procedure which you should only have done by a dentist after a thorough examination and assessment of your teeth. Over-the-counter kits sold in the UK are not recommended as they usually contain only a small concentration of hydrogen peroxide ( the whitening product). The legal limit in the UK is 0.1 % of hydrogen peroxide and effective bleaching products need to have about 3.6%. So home kits will NOT  be able whiten your teeth effectively.  

Also some contain mild acids and others are abrasive. This can cause ulcers and damage to the gums if the product is not used properly.  

Can a single tooth which has been root filled be whitened ?  

Yes, many dead teeth become 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 can then be applied working from the inside to whiten the tooth.  

When might tooth whitening not work ?  

Tooth whitening can only lighten your existing tooth colour. Also it only works on natural teeth. It will not work on any ‘false’ teeth such as dentures, crowns, veneers or fillings.  

If your dentures are stained or discoloured you can ask your dentist about getting them cleaned. Stained fillings, veneers, crowns or dentures may need replacing.  

How can I look after my teeth once they have been whitened ?  

• Avoid food and drink that will stain your teeth
• Try to a avoid smoking as this can stain teeth
• Brush your teeth twice a day with a fluoride toothpaste
• Try to cut down on how often you have sugary snacks and drinks
• Visit your dentist at least once a year.

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