I wouldn't worry about it. Redoing the filling could cause other issues anyway.

Chances are good there's mercury in your gums or jawbone below that silver stain and redoing the filling won't accomplish a thing in that regard whereas chelation will, overtime.

Such a shame and such an expense all of this needless dentistry. I have not had any problems with my teeth, ever really, except endless fixing of teeth that were damaged by dentists when I was mostly a child. I'd avoid redoing any dental work unless absolutely absolutely necessary.

I had a dentist pull a tooth with an amalgam filling about 5 months ago. He threw the tooth into the general waste basket, with all other trash. I didn't think anything of it at the time, but because of the mercury poisoning experience since (partly caused also by this same dentist), of course I've learned that dentists are suppose to dispose of the mercury in special ways. So a couple weeks ago, I also hear that certain lakes near us have been declared 'mercury poisoned'. Well, as I am sure you already know, pursuing legal recourse against idiot dentists is much more difficult than pulling teeth (ignorance of everything is their basis of existence), so I decided I would simply help make their lives rough just as they have done to me, by calling the local DEP or whatever they call the local department of environmental protection around here, and report them for throwing amalgam fillings into the waste basket, which obvouiusly heads to the dump with everything else. I imagine they have done lots of that (just like they did with mine) and that they are not the only ones either.