Adults can have up to 32 teeth. The wisdom teeth are the last to appear, right at the back of the mouth. They usually appear when you are between 17 and 25, although sometimes they appear many years later.

People often have jaws that are too small for all 32 teeth to fit - 28 is often the most we have room for. So if all the other teeth are present and healthy there may not be enough space for the wisdom teeth to come through properly.

No. If there is enough room they will usually come through into a useful position and cause no more problems than any other tooth.

Often there will be some slight discomfort as they come through, but this will disappear once the tooth is fully in position.

If there is not enough room, the wisdom tooth may try to come through, but will get stuck against the tooth in front of it. The wisdom tooth will be at an angle, and will be described by the dentist as 'impacted'.

A mouthwash of medium-hot water with a teaspoonful of salt will help to reduce gum soreness and inflammation (check that it is not too hot before using it). Swish the salt water around the tooth, trying to get into the areas your toothbrush cannot reach. Do this several times a day. An antibacterial mouthwash containing chlorhexidine can also reduce the inflammation. Pain-relieving tablets such as paracetamol or ibuprofen can also be useful in the short term, but talk to your dental team if the pain continues. The tablets should always be swallowed and not placed on the area.

If the pain does not go away or if you find it difficult to open your mouth, you should see your dentist. They will be able to see the cause of the problem, and give you the right advice. They may clean around the tooth very thoroughly, and may prescribe an antibiotic.

The Kings Langley Dental team will usually take x-rays to see the position of the root, and to decide whether there is room for the tooth to come through into a useful position.

It all depends on the position and the shape of the roots. Your dentist will tell you how easy or difficult each tooth will be to remove after looking at the x-rays. Upper wisdom teeth are often easier to remove than lower ones, which are more likely to be impacted. Your dentist will say whether the tooth should be taken out at the dental practice, or whether you should be referred to a specialist oral surgeon at a hospital. Very occasionally there is a possibility of some numbness of the lip after the removal of a lower tooth. Your dentist will tell you if it is possible in your case.

Either a local anaesthetic - like you would have for a filling - or sedation will probably be recommended. A general anaesthetic - where you would be asleep - can also be used, but this will only be given in a hospital.

Removing wisdom teeth may cause some swelling for a few days. But as soon as the area is healed, there will be no difference to your face or appearance. Your mouth will feel more comfortable and less crowded, especially if the wisdom teeth were impacted.

The amount of discomfort will depend on how easy it was to remove the tooth. There is usually some swelling and discomfort for a few days afterwards, and it is important to follow any advice you get about mouthwashes and so on, to help with the healing. Normal painkillers such as paracetamol or ibuprofen will usually deal with any pain. It is best to stay fairly quiet and relaxed and avoid smoking and drinking alcohol for 24 hours afterwards to make sure there are no bleeding problems. There may be some stitches to help the gum heal over. Your dentist will probably want to see you again about a week later to check how your mouth is healing, and to remove any stitches.