If the ice blocks aren't too large, I'll suck on them, but I don't chew on them. I try to avoid biting anything too hard because I have a wire attached to the back of my bottom teeth and I don't want to dislodge it.
I had one of those. It popped out 2 yrs ago or so. I need to get it fixed cuz the cement is still there.
How long did it stay for? I've had mine for about five years now.