Nickel in dental posts, is it okay to chelate with DMSA?

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Hello:

I have 2 metal posts under crowns, I plan to do something with them

but what unsure of what and theres the expense issue. My question is ,

it is okay to chelate with DMSA? I have no mercury not even under the

root canals, had that checked 2 months ago, but do have 2 metal posts

prob made of nickel, most common metal used for posts. I checked with

a biological dentist and he suggested to start, that mercury was the

big issue not nickel but I do want all metal out eventually. Just

checking to make sure. Again, thanks to all for the encouragement and

guidance.