A dream featuring your teeth could mean that you are actually grinding your teeth while you sleep. It could also mean you have feelings of aggression or sexual cravings. or that you are becoming confident or competent in some area of your life.
A dream where your teeth fall out suggests that some change is taking place in your life, or that you don't like the thought of growing old.
Rotten or discolored teeth may imply that you have a health issue, or some other issue in your waking life. It may also imply that you are being or have been dishonest in some part of your life.
To see perfect teeth suggests that you are focusing on perfection and how the outside world perceives you.