Here’s a case Dr Gleave removed all the old silver-mercury fillings and replaced with bonded composite tooth colored fillings. It’s not just more esthetic and natural looking but it’s so much stronger for the tooth and we get the toxic metals out of the body. It is also very common for decay to get around and under the metal filling as it corrodes with time. Dr Gleave found significant decay around all 4 of these teeth that was not evident on the x-ray. By waiting a few more years until the tooth became more sensitive or the enamel cracked it would have been 10x the cost to fix.