Hows your health? If it is not great, there may be a link to your teeth. Just a thought.
The reason that many may be having this similar dream is that there are alot of people with cavitation problems and mercury poisoning. Makes you wonder what the collective consious is trying to let us know. I was practicing a guided meditation to see what could be at the root of my health problems. Once into the "state" I saw a huge toothbrush come straight at me, flipping end over end.
Now I'm looking into a dentist who will do it right.