"just the fact that an intelligent authority dismissed any connection between my Amalgams and my mental illness...I have to put some weight into her opinion."
Imagine that - the person who poisoned you wants nothing to do with you now.
No, you need to blame her for poisoning you. And get back your records that YOU paid for. Don't bother spending money on a lawyer until she refuses to hand over your records. Put everything in writing.
Intelligent authority? Was it intelligent for your dentist to forgo all common sense and put mercury lozenges in kids mouths? Is she really an authority when she now wants no responsibility for her actions? She is just as much to blame as the ADA and she knows exactly what the mercury issue means.