I know Dawn, that's how I feel about it too. The first time I went in, I tried breathing through my mouth instead of my nose. Goodness knows why, but in my head I figured maybe I'd avoid more uptake of vapor into the brain from the nasal cavity.

Sure enough, got wheezing in my lungs instead. I was ill, but the second time I breathed through my nose and I swear it was worse, but again he had been in his premises longer and no doubt had much more mercury vapor in there.

So really I don't know. The only thing you could do is inform your dentist of this problem and ask him if you can come in and be put on alternative breathing source, which they give people during amalgam removals (hopefully). But then, most of the time they don't want to know, that's what I've experienced. If anything, it seems to annoy them. Why I wonder? It's not our fault we're hypersensitive to it, which is probably why we're so ill with it, our body is undergoing a continual reaction.

You know, there are dentists who have had to leave their profession because of this? The mercury vapor in their office ended up making them so ill they had to leave. Many became so sensitive in fact, they were unable to even enter a dental office again! So it seems to me, that sometimes, somehow, a person's body can sensitise itself to mercury to the extreme and make matters even worse.