Where Did That Black Line Around My Dental Crown Come From?

Dentists have used dental crowns to restore compromised teeth for centuries. Of course, technology has vastly improved since dental crowns were first used, and many people are walking around with older types of dental crowns on their teeth. Some of these people may look in the mirror one day and notice thin black lines forming at the base of their dental crowns, and they may wonder where these lines came from and what they can do about them. Here’s how these pesky and unsightly lines can form and how metal-free crowns can correct the problem.