Is it possible to have MTA removed from a retrograde root filling? How?

[Nosepain]

I found that MTA (Mineral Trioxide Aggregate) contains small amounts of arsenic ranging from 1-34 mg/Kg, with most brands having a level higher than the limit set by the ISO 9917-120 standard (2mg/Kg) (google article name: Presence of arsenic in different types of MTA and white and gray Portland cement). So I am thinking about having the MTA removed. At different times in the past year or so, I have experienced  worsened short-term memory, inability to focus well, easy fatigue, arm numbness, finger numbness, as well as more frequent headaches in the past year or so (the MTA having been put 2 years ago). All of these appear to coincide with the neurological symptoms of chronic arsenic poisoning (check article: A REVIEW OF ARSENIC POISONING AND ITS EFFECTS ON HUMAN HEALTH). Looking over all those symptoms listed under "chronic encephalopathy" in that article (p.20), I just found that the article also mentions among the neurological effects, "increased effects of small amount of ethanol", something which I had also noticed in myself in the past year or so but thought little of it since I drink very little anyway (and might have attributed it to a hypersensitivity in me).

But what are the options of removing the MTA? What are possible replacements? Do I have to undergo another apicoectomy to have it removed? Or does the tooth have to be extracted? I am not very inclined to have the tooth extracted. But if that's the only means of getting rid of the MTA and the arsenic and hopefully reversing all these neurological symptoms I am experiencing, then I think I would have no option but to choose an extraction!

I would very much appreciate any response from professionals (dentists and surgeons) as well as fellow patients since the dentist who performed the apicoectomy is very impatient and even disrespecting and is refusing to answer any of my questions regarding my concerns with arsenic from the MTA.

[Nosepain]

Amalgam contains 50% mercury and so is out of the question. I still have 3 amalgams and hope to remove them in the coming years.

[scottma]

Amalgam

[Nosepain]

Thanks scottma. Do you mean reentry through another apicoectomy? And once it is removed, should something else replace it? If so, what?

[scottma]

Firstly,you need to see a neurologist to confirm your symptom source. If it,s really arsenic poisoning, and it,s from mta, re-entry to periapica tissue to remove it is no problem.