Yes it is possible to have good health even with dental fillings!!! :) You just have to make sure your bowels and liver is clean and given plenty of good oils, and to sweat occasionally.
An infected tooth or abcess can wreak a lot of havoc, but so long as the fillings are sound and haven't broken off/loosened, your immune system and paths of elimination should be able to handle fillings. I've had fillings since I was 4 years old, and I've had decades of perfect health, so I don't attribute any of my problems to the fillings as much as this one abcessed tooth I had for too long because I couldn't afford to take care of it. :(