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  • Tooth Decay
  • Take care of your teeth or the decay will

Tooth Decay

What is Tooth Decay?

Tooth decay happens when the enamel and dentine of a tooth become softened by acid attack, producing a cavity (hole).

What causes Tooth Decay?

Tooth decay is caused by plaque acids that gradually dissolve away the enamel and dentine of the tooth to produce a cavity. Dental decay is the same as tooth decay and is also known as ‘dental caries’. Decay damages your teeth and may lead to the tooth needing to be filled or even extracted.

What is Enamel?

Enamel is the hard protective outer coating of the tooth and is the hardest part of the body. It does not contain any nerves or blood vessels and is not sensitive to pain.

What is Dentine?

Dentine lies under the enamel, forming most of the tooth and can be very sensitive to pain. Dentine covers the central pulp of the tooth.

What is the Pulp?

The pulp is a soft tissue which contains blood vessels and nerves and is in the middle of the tooth.

What is Plaque?

Plaque is a thin, sticky film that keeps forming on your teeth. It contains many types of bacteria.

Why do my Teeth Decay?

Decay happens when sugars in food and drinks react with the bacteria and plaque, forming acids. Every time you eat or drink anything containing sugars, the bacteria reacts with it to form acid. These acids attack the teeth and start to dissolve the enamel. The attacks can last for an hour after eating or drinking, before natural salts in your saliva cause the enamel to ‘remineralise’ and harden again.

It’s not just sugars that are harmful: other types of carbohydrate foods and drinks react with plaque and form acid. (These are the ‘fermentable’ carbohydrates such as the ‘hidden sugars’ that can be added to processed food, natural sugars like those found in fruit, and cooked starches.

Snacking on sugary or acidic foods and drinks can increase the risk of decay, as the teeth come under constant attack and do not have time to recover. It is therefore important not to keep snacking on sugary foods or sopping sugary drinks throughout the day.

What are the signs of Tooth Decay?

In the early stages of tooth decay, there are no symptoms but your dentist may be able to spot an early cavity when they examine or x-ray your teeth. This is why you should visit your dentist regularly, as small cavities are much easier to treat than advanced decay.

What happens if I have a Cavity?

Once the cavity has reached the dentine your tooth may become sensitive, particularly with sweet foods and drinks, and acidic or hot foods.

As the decay gets near the dental pulp you may suffer from toothache. If the toothache is brought on by hot or sweet foods this may only last a few seconds. As the decay gets closer to the dental pulp the pain may last longer and you may need to take painkillers like paracetamol or ibuprofen to control the pain. You must visit your dentist immediately as the tooth is dying and you may develop a dental abscess if it is not treated.

What happens if I don’t get it treated early?

Toothache is a sign that you should visit a dentist immediately, as it is a warning that something is wrong. If you don’t do anything, this will usually make matters worse, and you may lose a tooth that could otherwise have been saved.

What areas 0f my teeth are more likely to decay?

The biting surfaces of the teeth and the surfaces between the teeth are most likely to decay, as food and plaque can become stuck in these areas.

What treatment will I need?

If the decay is not too serious, the dentist will remove all the decay and restore the tooth with a filling. Sometimes the nerve in the middle of the tooth can be damaged. If so the dentist will need to carry out root canal treatment by removing the nerve and then restoring the tooth with a filling or a crown. If the tooth is so badly decayed that it cannot be restored, the only option may be to extract the tooth.

Will I always need a Filling?

No. In the very early stages of decay, your dentist may apply a fluoride varnish onto the area. This can help stop further decay and help ‘remineralise’ the tooth. However it is important to continue with a good oral hygiene routine, using fluoride toothpaste to prevent further decay developing.


What can I do to prevent decay?

Is there anything I can do to protect my teeth against decay?

Is there anything else I can do?

How can my dentist and hygienist help me prevent decay?

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Site last updated: 11/05/2017