A wisdom tooth is also known as the third molar. Wisdom teeth erupt usually between the ages of 18 years to 21 years. If the wisdom teeth erupt out straight, they do not need to be removed. However, if wisdom teeth are not erupting properly, they can cause problems and need extraction.
Wisdom teeth may erupt partially, leaving a flap of gum covering them. Food and germs can trap under this gum flap and cause gums to inflamed. These are the signs of infection and pain.
Other problems that develop from impacted teeth are damage to neighboring teeth and bone.