Caérsele los dientes a alguien

[ROBINDESBOIS]

Ayer soñe que se me caían los dientes
Last night I dreamt that my teeth fall off ??? OK??

[poli]

Ayer soñe que se me caían los dientes
Last night I dreamt that my teeth fall off ??? OK??
No.
Here is how to say it:
Last night I dreamt (in American English it's better to use
dreamed) that my teeth fell out.

[Rusty]

Yesterday I dreamt my teeth were falling out.

Both dreamed and dreamt are used in America, but the former is more popular. I prefer dreamt, myself.