Wisdom teeth, or third molars, typically begin to develop in early adolescence, and may attempt to erupt into the mouth around the ages of 17 to 20.

Wisdom teeth are sometimes removed after the roots are somewhat developed, or at least three-fourths developed. This is usually in the adolescent years. In many cases, wisdom teeth do not grow in properly, have a proper bite relationship, or have healthy gum tissue around them. Often, wisdom teeth improperly erupt and become impacted, requiring them to be extracted, or pulled. Although they are like any other teeth, most people continue to have normal bites and well functioning sets of teeth in their absence.