As far back as Greek mythology, teeth were said to refer to children.
The reason probably was that, during pregnancy, mothers experienced the rapid loss of their teeth (“Each child will cost you a tooth”).
In mythology teeth are considered similar to seed corn, comparable to dragon’s blood. In addition, teeth symbolize the oral qualities of the dreamer.
The possible reason for this might be an eating and biting urge, or the repression of it. And, last but not least, teeth, like Mouth, are used to take in food. See Beauty, Face, Bones, Bite.
According to Jung and Freud, teeth are often a phallic symbol; and according to Freud, dreams about toothaches are considered masturbation dreams.
According to the newest dream research, women often dream about teeth during menopause.
What Does Teeth / Loss Of Teeth Mean In Dream?