I have a molar that has a crown
on it and, in January, had a root canal
retreatment on the same tooth. Initially, I did get an infection which was treated by antibiotics, and then was fine. However, recently (e.g., August), the tooth seems a bit achy (on and off) and the gum line looks white-ish underneath the crown. The gum is not sore, however, and does not seem imflamed. Is this white gum normal with a root canal?