"thank you for the replied everyone. After hours of reading on this site I'm honestly afraid to get them taken out, afraid of the chelation. Has anyone made 100% recovery?"

Don't be so afraid. I had 25 fillings, almost all of which were over 20 years old. It has been around 16 months since the last of my amalgams were replaced. I have only been chelating consistently for around 4 months now, as the first year I got very sick from chelating with ALA only and had to keep stopping. This year I have been using DMSA+ALA and the chelation is progressing with much fewer side effects. I am still not well, but at least I feel I am making progress.

The most important thing when having amalgams drilled out is the use of the high powered suction. I am not convinced that dental dams help that much. Many dentist don't like using them. One thing that helped quite a bit when he was working on large fillings in rear teeth was the use of a rubber block to keep my mouth held open for long periods of time.

Make sure that the crowns you get are all porcelain if possible. I had one tooth with a root canal that needed a metal post and a metal backed crown, but the rest of my crowns are porcelain only and without a metal post. Ask the dentist is it is possible to get inlays or onlays rather crowns. My dentist said that with a few of my fillings he wouldn't know if a crown or just an inlay or onlay would be needed until after he drilled them. Getting an inlay or onlay preserves much more of the tooth than getting a crown. If the tooth structure is not strong enough, then a crown might be needed.

My dentist has a hygenist which does the cleanings, and schedules an hour for the cleaning. The cleanings usually take half an hour or so, but my first cleaning with her took around 45 minutes. My past dentist did the cleanings himself, and did a very rushed job(perhaps 15 minutes or so?). The hygenist does a very thorough job. I now get a cleaning every 3 or 4 months since my gums have been bothering me.