Calculus is initially a soft, milky white scale that adheres to the surface of the teeth and then hardens and calcifies over time, stimulating the resorption of the alveolar bone and leading to periodontal disease. Tartar can be removed through multiple channels. 1, vitamin-rich food, as little as possible to eat food and drinks containing corrosive, try not to eat sweets and sticky food, to avoid the formation of calculus attached to the surface of the teeth. 2, rinse mouth after meals: after meals should be timely rinse mouth to remove food residues, develop the habit of brushing teeth in the morning and evening, can better prevent calculus, brushing time to maintain more than three minutes, need to pay attention to the correct brushing order and method, to ensure that the plaque and dirt can be cleaned to avoid deposition. 3, scaling: the most common way to remove calculus, scaling can remove all the plaque and calculus attached to the tooth surface, scaling will be slightly sore and swollen, gum bleeding may occur after the removal of calculus, scaling needs to pay attention to post maintenance. In addition to serious brushing, dental calculus also needs to be scaled regularly, and the best time for scaling is once every six months. When dental calculus is serious, in addition to regular visits to check the condition of calculus, it is also necessary to check whether there are potential factors of periodontal disease, and eliminate potential factors to ensure dental health.