Black line on a tooth? What it really is and what can be done about it June 16, 2021 at 10:05 a.m. | Updated July 7, 2021 at 10:09 a.m.

A tooth abscess happens when a tooth fills with pus and other infected material. This occurs after the center of a tooth becomes infected with bacteria. It’s typically a result of tooth decay or ...

Dark line on crowned tooth next to the gum line. A dark line next to the gum line of your crowned tooth is normal, particularly if you have a porcelain-fused-to-metal crown.

Crowns may fully or partially cover a tooth all the way up to the gum line, depending on the purpose and the health of the tooth. Read on to learn about the different types of crowns, ...