There is not enough space in the jaw bones for our wisdom teeth because the jaw bones are now smaller than the old ones.
Although some scientists say that this is a problem caused by evolution, but the main reason underlying the problem is that; foods and drinks we eat are missing from some of the main nutrients.
Wisdom teeth are third molars and are located in the back of mouth. These teeth erupt mostly between the ages 18 to 24 years. There are generally 4 wisdom teeth. 2 in the upper jaw and 2 in the lower jaw. Some people have fewer wisdom teeth, some have more than 4 wisdom teeth, but this is a rare occurrence.