Thank you presenting information regarding mercury hazards. I was at the dentist recently to have a filling replaced, and he didn't even ask me what material I wanted; he categorically used mercury amalgum! I contracted severe tinnitus in early 2000, and I am beginning to wonder if my dozen mercury amalgum fillings are a contributing cause to my tinnitus. I also sleep very poorly, have a bad memory, and get frequent sinus infections. Could these probelms be caused by mercury?