Wisdom teeth, also referred to as third molars, get their name by being the last teeth to come in during young adulthood, the time of life when you gain maturity or “wisdom.” Most people have most of their permanent teeth by age 13. Your wisdom teeth should come into your mouth between the ages of 17-21. Sometimes they do not have enough room to come in normally or are in the wrong position to come straight up. When that happens, your dentist may refer to them as impacted and they may have to be removed.