Every patient is unique, but in general, wisdom teeth may need to be removed when there is evidence of changes in the mouth such as:
- pain
- infection
- cysts
- tumors
- damage to adjacent teeth
- gum disease
- tooth decay (if it is not possible or desirable to restore the tooth)
In addition, the condition of your mouth changes over time. Wisdom teeth that are not removed should continue to be monitored, because the potential for developing problems later on still exists. As with many other health conditions, as people age, they are at greater risk for health problems and that includes potential problems with their wisdom teeth. Regular dental visits are important so your dentist can evaluate not just your wisdom teeth but your overall oral health to help you prevent and manage dental disease and achieve optimal oral health.
Article taken from: http://www.mouthhealthy.org/en/az-topics/w/wisdom-teeth.aspx