It looks as though the problems I've been having were caused by the abundance of dental amalgams (mercury) in my mouth, which has been there for many years, some 20, some 40. It is likely that this will be confirmed and I will have to have all of it removed and replaced. The work will be extensive because I've got crowns on about 7 teeth under which there are amalgam fillings. The amount of work that needs to be done will undoubtedly be quite expensive. Given that, I am considering having the work done in another country, such as Mexico or somewhere else. My question is, has anyone had this done either in Mexico or another country, and was the quality of work such that you would recommend the facility you used? Is there a site that can provide me info on such places?