Dental scaling can generally remove black plaque, but due to the variability of individual conditions, it is impossible to generalize whether or not all patients can have black plaque removed. Scaling is the use of medical instruments, through high-frequency ultrasonic diagnosis, so that dental plaque, food debris, dental calculus out of the pressure surface, which can play a role in cleaning teeth, as well as maintaining dental health. If patients have poor hygiene habits in their daily life or smoke for a long period of time, it may lead to the appearance of black plaque on the teeth. Usually, most people can have their black plaque eliminated by scaling. However, due to the different conditions of patients, some patients who have a large area of black plaque, black plaque is relatively stubborn, general scaling can not be completely washed off. It is necessary to remove it with the aid of sandblasting at a later stage. Patients in daily life, in time after scaling, also need to keep the mouth clean and clean, diligent brushing and rinsing. Diet, eat more food rich in vitamins and protein, avoid spicy and stimulating food. Maintain sufficient rest time and quit smoking appropriately.