I had all my childhood mercury fillings (and there were ALOT) changed in the 80's. Without insurance to help! I paid my dentist for years but he insisted I needed to get them old fillings all out. Since he was willing to take my $20-25 a month and no interest it was ok with me. He just said that mercury has to come out. And in one year I was there 36 times to get my teeth all redone. Boy that wasn't fun! But I was dirt poor and figured I had nothing else to do!