Wisdom teeth are your third molars that are way in the back of your mouth. You usually have four wisdom teeth, one in each corner of your mouth – two on top, two on bottom. Wisdom teeth are the last of your teeth to come in, or erupt through the gums. They normally emerge between ages 17 and 25, a time of life that has been called the “Age of Wisdom.
Wisdom teeth do not always cause complications or pain. But because many people have too little space in their jaw, they sometimes grow at an angle, pushing on, or getting stuck against, other teeth. This is known as impacted wisdom teeth, and it affects almost three out of four people in their 20s. A trip to the dentist for an x-ray of your teeth can tell you if your wisdom teeth are impacted.