There's a popular saying in dentistry that asserts, "You can't keep what you can't keep clean." Which explains the need for extracting those unwieldy wisdom teeth. 90% of the time, the human jaw is simply too small to allow the full set of wisdom teeth to erupt normally, without disturbing the rest of the bite. Even if they do erupt, they're so tightly pressed in against the neighboring teeth that they can't be kept clean. Further, if allowed to come in without enough room, they'll often become impacted—leading to loss of the adjacent teeth as well. That's why we recommend extracting them at the point where they're fully developed but haven't had the chance to fully come in—around the age of 18 or 19.