Wisdom tooth need to be extracted because they are severely decayed, or have advanced Periodontal disease or have been broken in a way that cannot be repaired. Some teeth may need to be removed because they are poorly positioned in the mouth such as impacted teeth or for orthodontic treatment.
Wisdom tooth also known as third molars & are the last teeth to erupt. They usually erupt in the early twenties or late adulthood. Problem with third molars occurs if they don’t erupt properly due to  lack of space they need during the course of eruption.