WHAT? YOUR MD IS AN IDIOT!
Sorry but Mercury Amalgum (sp) fillings do not cause Hashimoto's or there would be more people running about with it.
Hashimoto's is a genetically dominant thyroid condition that is permanent. It does not go away. What you need is an MD that has something between his/her ears that doesn't rattle! You need proactive treatment and management so that you do not suffer unnecessary angst as your immune system systematically kills off your thyroid.
I had 4 MA fillings. These were replaced with composites over time. My Hashimoto's came on after my MA fillings were long gone. What is the source? My mother and her mother and her four sisters and aunt... my father's line as well aunts and cousins... I had no chance.
You have Hashimoto's, this is a fact. There is an 80% chance that it is passed on between females of a family line, FACT. It is activated by periods of extreme hormonal flux (puberty, pregnancy, menopause) and certain viruses and drugs.. FACT. There is less chance a male will get it 20% versus 80%. My mom is one of 8 surviving children (5 females and three males) All the females have Graves, Hashimoto's or a combination of both. My Uncles clean not a bit of thyroid dysfunction in them.. yet.
You can have both Graves and Hashimoto's this MD of yours probably will deny that, but I can show him five different lab reports proving it.

After an extensive medical journal database search... THERE IS NO MEDICAL PROOF OR STUDY that links MA fillings as a cause of Hashimoto's!!! Man does this MD need a reality check. Does this MD believe if you hold a vial of TPOAbs that yours will transfer via osmosis into the vial and go away? Humm? UGH! I thought I had heard it all. *snort* You need a new MD and you need to treat your Hashimoto's not visit a dentist.
MG