The FDA no longer recommends mercury amalgam dental fillings to be safe for patients who have parkinsons disease, alzheimers, kidney problems or are sensitive to the amalgam or its components. Also not safe for young children or the unborn child,
The WHO have recently demonstrated that even 1 atom of elemental mercury can be detected by the human body and can cause clinical symptoms.
Mercury poisoning can cause any mental or physical disease.
The FDA's recommendations are somewhat obtuse for PD people who have a mouth full of mercury filings. The ADA refuted the FDA's recommendations.
"The ADA reaffirmed its position that dental amalgam is a “durable, safe and effective” restorative material in response to the U.S. Food and Drug Administration’s Sept. 24, 2020, statement that existing evidence shows that dental amalgam is not harmful to the general population and treatment options should be thoroughly discussed by the patient and dentist."
The ADA still says its safe - fear of too many lawsuits.
The ADA was set up and funded by the mercury amalgam industry and is still funded by them. The ADA has told a great many lies about mercury amalgam and cannot be considered as an independent truthful source of information.
No fan of mercury amalgam here. This link contradicts your first sentence:
quackwatch.org/dental/hg/my...
Do you have any links that support your comment?
Happy to say I had my amalgams removed and my mercury blood level has halved from 20 to 10nmol/L in 2 years.
Why is Ambroxol not approved by the FDA? 
Dr Klinghardt protocol for PD
ARE FDA TRIALS ALWAYS ABOVE BOARD?
NKMAX's NK cell therapy for Parkinson’s scores FDA compassionate use approval
Focused Ultrasound Therapy, FDA-approved for Essential Tremors
