Amalgam fillings

I am thinking of having my fillings removed because of suggestion of toxicity to mercury, does anyone have any experience of this or links to information about the process of having them removed?
I have read that the process of having them removed, with fragments of mercury getting swallowed etc can be more toxic than leaving them in situ. the process of detoxifying your body from mercury etc is called chelation and you need to raise this with yr dentist I think.