Wisdom teeth are the third and last molars in the back upper and lower corners of your mouth. While it varies from patient to patient, they usually erupt between the ages of 17-25. Some people never get a full set of wisdom teeth. If there is adequate room in the jaw, and wisdom teeth come in properly and are able to function normally, there is often no need to have them removed. Often however, wisdom teeth grow in at strange angles and cause problems, and intervention is necessary before they become more risky or dangerous for the patient.