Just as the twenty-year-old teeth that foreigners call "wisdom teeth" are late, they often create problems and are advised to immediately withdraw from their dentists. These teeth, which do not have much function in chewing, are the heritage of our ancestors who have yet to discover the food they eat. Their raw food needed a stronger jaw and teeth to eat.
We do not have all the other teeth at the same time. Milk teeth come out first. After they are punched out, the fortooth and the dog tooth come out and then the molar tooth. Wisdom teeth follow this sequence a little late. Although all these events are happening, we continue to develop, but after we are over 20 years old, we have wisdom teeth in our jawbone.
As humanity evolves, so little space remains in our wisdom tooth, that is, the jaw gradually shrinks in human evolution. For this reason, in some people these teeth can remain impacted without ever leaving. It can rot because it can not sit tight, it can make an inflammation. Since there is no function, dentists prefer to extraction.