Impacted wisdom teeth may need to be removed for a number of reasons. For example, repeated attacks of infection in the gum can lead to pain and swelling, food packing can cause decay in either the wisdom tooth or the tooth in front, and cysts can form around the wisdom tooth.  This section is therefore headed by a Consultant Oral and Maxillofacial Surgeon at the Royal Marsden Hospital who explains what can be done to restore patients to good oral health.