Not all wisdom teeth require removal. Wisdom teeth extractions are most often performed because of an active problem such as pain, swelling, decay or infection, or as a preventative measure to avoid serious problems in the future. If impaction of one or more wisdom teeth is present, and left untreated, a number of potentially harmful outcomes can occur, including:
Damage to nearby teeth: Second molars can be affected by impacted wisdom teeth, resulting in tooth decay , periodontal disease and possible bone loss.
Disease: Although it is not very common, cysts and tumors can occur in the areas surrounding impacted wisdom teeth.
Infection: Bacteria and food can become trapped under the gum tissue, resulting in an infection.
Tooth Crowding: It has been theorized that impacted wisdom teeth can put pressure on other teeth and cause them to become misaligned.