Teeth in a dream often represent aggression. If teeth play an important role in your dream, you may be repressing anger against someone in waking life.
A dream about teeth may also be a warning that you have made someone else angry.
Losing your milk teeth is a sign of growing up, so teeth falling out in a dream often symbolizes the movement to a new stage in life, as well as the acquisition of knowledge and wisdom that has accompanied this change.
If you dream that your teeth are falling out, you may also be worried about growing old and weak, and about the inevitability of death,