Wisdom teeth, also known as third molars, often need to be removed or extracted. They start forming as early as age 14 and come into the mouth at about age 18 to 21 years. Oftentimes, wisdom teeth may come in crooked or at an angle and can cause crowding of adjacent teeth. They may also become impacted and remain under the gum and bone. See the video below for an informative video on wisdom teeth.