Between the ages of 16 and 25, a third set of molars erupts, called your wisdom teeth. Although they were once necessary to chew tough foods, humans have evolved, and they no longer serve a purpose. Human jaws have narrowed over time, which means most people don’t have enough room in their mouths to accommodate another set of molars. According to the American Academy of Oral and Maxillofacial Surgeons, 90% of people will experience at least 1 impacted wisdom tooth. This results in 5 million people having wisdom teeth removed every year. If your third molars are giving you grief, here are a few signs that you might be dealing with an impaction.