My DD is nearly 2, and really relies on her dummy for sleep - both naps and nighttime. Now, her sleep is pretty amazing tbh - nothing to do with me, just luck and the bloody dummy I think? She sleeps from 7pm - 8am; occasionally wakes in the night if she loses her dummy, which is attached to a comforter thing, but usually sleeps through... However I am concerned at how she seems to have it in her mouth and sucking away for most of the night, what can that be doing to her teeth?? argh 
DP is very keen for it to be gone, which I understand, but I can't really see how I can take it away at the moment as she is so reliant, and also wouldn't really understand about dummy fairy etc. at the moment. She literally won't sleep without it, just screams. Any tips for removing dummies from slightly younger kids like this? Should I just calm right down?