HI Elisa,
I am not going through this myself, but was told by our dentist that graves affects the tooth enamel. Wish I could remember how and why.
Will post to you if I find the answer. I know how discouraging bad teeth can be as I have this problem due to my own disease and the fact I took meds when my teeth were forming that caused them to pit and break off easily.
God Bless gal!
JAN