When dental patients go to the dental clinic, the receiving doctor will often suggest that the patient clean the teeth (commonly known as scaling); many people who smoke often take the initiative to the hospital to request cleaning of tobacco plaque, but often soon after the cleaning, found that the tobacco plaque is re-attached to the teeth …… So, cleaning the teeth in the end is good? How often is it safe to clean teeth? What is the complete dental cleaning procedure? Through regular scaling, not only can plaque and calculus on the teeth be completely removed to keep the periodontal tissues healthy and prevent periodontal disease, but also, it is easy to find small imperceptible dental diseases, such as relatively hidden caries, so as to achieve the purpose of early detection and early treatment. Ultrasonic scaling is the main procedure of scaling, and the handle of the scaling machine is used, its disinfection is very important, if there is no high temperature sterilization, it is possible to spread germs from one patient to another through the repeated use of the scaling machine handle. The rumor of HIV infection through scaling is not “alarming”; sandblasting to remove plaque prevents the use of ultrasonic scaling on the one hand, which excessively shocks the periodontium, and at the same time can better remove plaque; polishing the tooth surface can keep the tooth surface smooth and prevent the rapid “rebound” of plaque redeposition. How often should I clean my teeth? Usually, people with good oral hygiene habits need a thorough cleaning about once a year, while those with poor oral hygiene need a cleaning in half a year; people with periodontal disease, in the uncontrolled stage of periodontal disease, a cleaning once every three months can help control the disease. This is not absolute and it is best to consult your dentist. Here, I would like to advise all tooth-lovers not to go to a small clinic on the street without strict sterilization management to avoid losing a lot of money for a small amount of money.