of 20 teeth stays in place until age 5, when, one by one, they teeth will start to fall out and are replaced by permanent, or adult teeth.
these baby teeth have shorter roots and fall out to make way for permanent teeth. typically, by the time a child reaches 13 years old, he or she has lost all of the baby teeth and they have been replaced by a full set of 28 permanent teeth. later, between the ages of 17 and 25, four wisdom teeth will also surface in the back of the mouth.
baby teeth differ from permanent teeth in that they are whiter in color (permanent, adult teeth 