When you dream teeth means: This is the oldest known symbol, dating back to Ancient Egypt. The most vivid and mysterious symbols of the human body, teeth dreams can be vivid but mysterious. There are many interpretations. Tooth can crack, break, fall out, or become rotten. This brings to light unconscious processes that are taking place in the mind of the dreamer. It can sometimes be a sign of loss, or a feeling of inadequacy.
(in Dream Dictionary)