Black stains on the roots of the teeth can be removed by scaling. 1. The black stains on the roots of the teeth are mainly caused by the interaction between food debris and saliva, also known as plaque. Plaque may cause gingivitis, and patients can go to a regular hospital and have it removed by scaling. 2. The professional term for scaling is gingival scaling, which is the use of scaling instruments to remove tartar, plaque and stains on the gums, and delay plaque and tartar redeposition. Generally take ultrasonic cleaning, through high-frequency oscillation will be attached to the surface of the teeth to remove tartar. 3. However, it is important to note that scaling is not recommended for patients using artificial pacemakers and suffering from various bleeding disorders to avoid affecting their health. For people with black stains on the roots of their teeth, they should develop good hygiene habits, brush their teeth diligently and go to the hospital regularly for scaling, which can effectively prevent oral diseases.