Big Ditto on the mercury being toxic. Al Huggins wrote a great book called 
"It's all in your head" he was a one time dentist who went back to shcool and 
became an immunologist I think it was anyway he has been blowing the whissle 
big time on the dangers of mercury fillings and I might add mercury 
preservative's that are put into our childrens vaccine's. He and other's point 
out that these mercury preservative's are contributing to the Autism epedemic 
that was not on scene until mercury was used. I had all mine redone about five 
years ago and will never regret it.....Debbie