What can cause a black line on a tooth along the gum line?

Answer by  Shiji (128)

a black line on the tooth along the gum line is due to plaque. it is formed by faulty diet and improper brushing. brush your teeth properly after every meal thus you can avoid plaque formation.

Answer by  Mary15 (347)

You better have that checked out with a periodontist ASAP to try to reverse the effects of the infection. The black line is a sign of decay and damage.

Answer by  sanoshin (71)

Following causes are common for a black line: Tobacco, Smoking, Drinking, eating chocolates. Regular cleaning from expert dentist is a must to avoid these kind of stains. These stains may be in many colors (ex. yellow, red, brown, orange). People who clean and brush their mouth regularly also may have these stains.