I had these dreams 4 or 5 times during a depressive period of my life. I never knew how common this dream was until I saw in Reddit from others. In my dreams, I would spit them out one by one and soon all my teeth would be in my hands. And I would wake up scared. I don't remember having them before that period. I haven't had them for the last 3-4 years once I came out of that phase.