dentistry is something i have spent some time looking into, although i've not really looked into the ADA etc. My mum, her health was absolutely destroyed by her 10 amalgam fillings. She had cfs for 25+ years. Like 2 years after having them out she's better than ever, but still not entirely right. A life time of damage from low level chronic mercury poisoning is not easily undone. Me, I am only in my mid 20's. But i too had a chronic health melt down. I was virtually house bound for 2 years. I managed to figure out what was wrong with me, and fixing it has been a long slow journey. I basically was suffering from chronic bone infections. I had 2 horizontally impacted wisdom teeth, ie they were growing totally horizontally. My right side really wasn't that bad at all, but on my left side i had a small infection which carried on for like 3 weeks, and it left a hole in my jaw, and all the gum around the tooth disappeared.
The x-ray looked like this

You can see the bone loss under the tooth. That's where infection has literally eaten away the bone. But I saw a load of dentists and they all thought this was fine. I showed doctors and one stamped her foot and said theres no way impacted wisdom teeth could be causing my health problems then went on about the fact hers were impacted. Another just flat out said, I know absolutely nothing about the mouth. My vet on the other hand, knew exactly what problems this would cause, including the abnormality which showed up on my liver function test. Anyway, I had the teeth taken out last year, my problems went, and well came back again since the bone never healed correctly. Ontop it looks like its healed perfectly, but inside the bone, its basically not healed at all. I had something called a Cavitat scan which is something the ADA has tried extremely hard to put the company that makes it out of business, even though it is FDA approved. They actually have legal protection now from the bogus lawsuits made against the company. In the UK there are only 2 people that have these. I've seen both of them, and they both produced identical scans of my jaw. The first guy had no clue how to fix the nightmare unleashed on me. And the second which is giving me surgery on monday .. will hopefully fix me.
Heres my ultra sound scan

it basically shows blood flow. So 48 where i had my wisdom tooth out has no blood flow at all. Also the bone marrow under the adjacent tooth has entirely died, so that needs to come out sadly an the bone all cut away so it can heal. The guy that i went to see also used an infra-red laser thing to measure temperature of where I had my wisdom teeth extracted, and it was 0.4 deg C cooler than the rest of my mouth, simply because there was no blood flow there. I was gonna post this later but I've not had the surgery yet. Gonna have it either videoed, or photos taken of the operation so I can write about it. The whole experience has left me extremely bitter about 'healthcare' having been so spectacularly failed by the system.