At present, the easier way to remove calculus is ultrasonic cleaning. 1. Ultrasonic cleaning is through the high-frequency oscillation of ultrasonic waves on the teeth of the calculus and stains broken, directly make the calculus off so as to remove, can be faster to clean the calculus. In addition, vinegar gargling and alum water brushing also have a certain effect on removing calculus, but it is not recommended to use it for a long time. 2. Since ultrasonic cleaning has certain risks, patients with severe heart disease, installed pacemaker, leukemia, severe anemia and severe periodontitis should not perform ultrasonic cleaning. After ultrasonic cleaning, patients should avoid eating hot and cold stimulating food, avoid biting hard food and pay attention to oral hygiene. Patients with dental calculus should go to regular hospitals for consultation and standardized treatment with the help of doctors.