Wisdom teeth

Why do we have wisdom teeth?
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.
Do wisdom teeth always cause problems?
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.
What is an impacted wisdom tooth?
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...