Re: 10 mo. old daughter grinds her teeth....YIKES
My girls did this, and still do once in awhile (18 months). It could be because she is learning, and the sound and the feeling are new to her. Shes discovering her body, and that might have something to do with it.
I asked my older daughter and son dentist about it a few months ago, and he said they should be fine, as they get older they will lose those teeth anyway, and it would be unlikley it would be damaging.
Good Luck to you!
Twin girls 7-03