An impacted tooth
is a tooth that is positioned against another tooth, bone, or soft tissue so that it is unlikely to fully erupt through the gums to reach its normal position in the mouth. Wisdom teeth
the wisdom teeth or third molars are the last to come through, right at the back. They usually appear between the ages of 17 and 25. Although sometimes they appear many years later. Nowadays people often have jaws that are too small for all 32 teeth - 28 is often the most we have room for.