What are black triangles?
What causes Black Triangles?
Gum recession: receding gums cause teeth to appear longer and for roots to become exposed. Gum recession may also be due to chronic gum disease.
Age and wear: the wear-and-tear of aging, inadequate brushing technique, and tooth grinding take a toll on your gums and teeth, which may lead to the apparition of black triangles.
Orthodontics: when teeth are crowded, their roots and crows are packed tightly together. However, once the teeth are properly aligned, gums may not follow the new contour of the teeth, which often leads to the development of black triangles.
Bioclear : a step-by-step method