There are two main reasons why wisdom teeth would need to be extracted.
The first reason why wisdom teeth might need to be extracted would be in the case of orthodontics. When the orthodontist is repositioning people’s teeth, sometimes it’s necessary to have the wisdom teeth removed in order to ensure that your teeth will remain in the proper position.
The other reason why they would be removed would be in instances of pain. Generally, pain results from swelling in the back area of your mouth or if the tooth should happen to come in and is malpositioned and causes decay in the adjacent tooth. Those would be necessary reasons to have these teeth removed.