Regular dental cleanings are good for oral health and can remove calculus from your teeth. But not all people are suitable for scaling, people with infectious diseases and blood diseases are not suitable for scaling. For people with periodontal health, the number of teeth cleaning should not be too much, and it should be once every six months. And some special groups such as periodontal patients need to clean their teeth every three months. Regular teeth cleaning is one of the effective measures to prevent periodontitis and other dental diseases. Some countries also enact some mandatory measures in order to urge people to have their teeth cleaned. In some European countries, dental cleaning and medical insurance are linked, and if people do not regularly clean their teeth, the government will reduce the amount of their medical insurance. Because teeth cleaning is not only a comprehensive cleaning of the teeth and mouth, but also can detect other diseases of the teeth early, which is convenient for early treatment. Conventional scaling includes four steps: disinfection, scaling, sandblasting, and polishing. At present, some small clinics only scale teeth, not polishing, which is not standardized at all. And some people go to some small clinics or beauty salons to clean their teeth in order to save money and convenience, but this kind of informal quick tooth cleaning will bring adverse consequences, such as it may damage the enamel and gums, and aggravate periodontal disease. Disease, unqualified disinfection will also cause cross-infection.