Part of the problem is that dentists don't have the incentive nor arguably the training and knowledge to cure the problem. Cavities and lost teeth, brings them money. So don't expect them to be looking around for cures like regrowing teeth or reversing cavities, unless some unusual "one in a several billion" fellow comes along (who the others won't like) to change things (like how we got Penicillin or the cure for Po…
The "mercury" metal fillings last much longer - no longer why dentists try to use the fear of mercury poisoning to sell you on a replacement plan. Thanks, but no thanks.
The dose we are exposed to, as patients, is negligible. If there's a health problem, it's for dentists.