What are wisdom teeth?
Wisdom teeth (also called 'third molars') usually appear during the late teens or early 20s and sometimes even later in life. They are often the last teeth to come through (erupt) and are found at the very back of the mouth, behind the second molar teeth. Most people have four wisdom teeth - upper right, upper left, lower right and lower left. Some people have no wisdom teeth at all, or may have fewer than four.