Have you replaced a damaged or decayed tooth with a dental crown? With this restoration, you’ll be able to enjoy your full smile for many years to come. However, if you’ve started noticing a black line around the base of your dental crown, then this might be an issue you’ll want to get corrected. But what exactly causes this situation? Read on to learn what this discoloration at the base of your restoration means and how you can treat the problem to rebuild your pearly whites!