I've just had my 6 monthly check up with my dentist. Lovely, friendly and not at all heavy-handed bloke. Everything OK and nothing needed doing so we had time for a chat.
We got onto the subject of thyroid (as you do) and he surprised me by saying it's obvious that having thyroid issues or inadequate thyroid treatment has a knock-on effect on the rest of the body. He also said that he thinks it's a waste of time just taking things in isolation without looking at the whole picture and that the thyroid needs to be spot on and then lots of other things will fall into place.
Wow!! I think I'll go and see him the next time I'm not well!!
Ironically, it's easier to get an NHS appointment with my dentist than an NHS appointment with my GP.