Dental associations are nothing more than trade unions designed to protect practitioners, and the union itself. Any concern for the well-being of the patient, when it is raised, is subordinate to the first directive of protecting the union. Which is why any threat - real or perceived as such - to the union or its practitioners is usually met with hostility.
In even simpler terms, practitioners band together as a unit to protect their income stream and living. They'll fight you to the death too to protect their own income generating products and services. (And don't tell me they don't obsess over their own investment portfolios, retirement accounts and vacation properties.) Alright, you say. But why do they have to - or feel the need to - protect themselves so vigorously. What are they afraid of?
You'd think that someone who has spent upwards of seven years learning the skills and knowledge required to practice their profession wouldn't need the external validation of a trade union proving their competence. Ah, but that begs the question doesn't it? Exactly what is their competence in?
Is it competence to try to pull the wool over our eyes when someone asks the simple question about mercury in amalgams, whether it comes off in the body or not?
We need to keep asking question like this in the face of practitioners who claim some union proclaimed prerogative in keeping all the answers to themselves. Maybe they'll finally get it and join the rest of us in the internet/information age.