I have a wisdom tooth that is partially erupted at the bottom. It has a filling in it but there's a black mark on the filling. I pointed it out to the dentist at the last visit but tgey said it's OK and sometimes fillings do get discoloured. Has anyone heard of this happening? I'm worried it's decay as it's a bottom wisdom tooth and the roots are near a nerve they are worried about taking it out... 😖 would you phone and ask for a check or am I being fussy and dentist knows best?