Damage to the enamel outer layer of the tooth may result in black-looking tartar. Tartar below the gum line, also known as subgingival tartar, may take on a black appearance as blood from sensitive or damaged gums combines with the tartar itself. This can be an indication of gum disease becoming serious.

What does it mean if plaque is black?

Causes of Black Tartar

Smoking. Diets high in starch and sugar. Drinking liquids which stain such as coffee and wine. Trauma or damage to the tooth's enamel.

Can plaque on teeth turn black?

Untreated plaque can harden and turn into calculus, which requires professional cleaning to be removed. Tartar turns black as a result of being stained. This black discoloration could be caused by: Bleeding gums.