I've noticed a blue/grey circle where my crowned tooth was filled after root canal. Is this normal? (Photo)

December 3, 2014
Asked By:Abby38 in De Pere, WI

I had a crown placed on my tooth a few months ago. Then a couple of weeks ago I ended up needing a root canal on that same tooth. The crown was drilled through & then filled. Since then, I've noticed a blue/grey circle where it was filled. Is this discoloration normal?

1 photo