Recently removed my 6 Amalgams which were all very deep. My first dentist didn't want to do it because of high risks of ending up filling the root.
I found a biological dentists who removed them all. For me it was a gamble and out of the 6 tooth, only one died and I pulled it out (back molar) rather than doing a root canal.
It all worked out at the end!
just gotta have some faith and find a good dentist.