Black Line Around a Dental Crown: What Does It Mean?

Dental crowns are caps that are shaped like teeth and are often used to repair damaged pearly whites. They are also commonly used to seal a tooth off after a root canal to protect it from further damage and can improve its look, structure, and function. Though this treatment is meant to make your smile look better, the opposite might be true when a dark line begins to form around your restoration. What is the cause of this? Read on to learn what causes a black line around a dental crown as well as what your dentist can do to fix it.