The medical term for what people commonly call “scaling” is “scaling”, which is a mechanical or physical method of removing bacteria, tartar, pigment and other tartar from the tooth surface. The main purpose of scaling is to prevent and control oral diseases, not just to look good. The inflammatory condition of gingivitis and periodontitis can be reduced by scaling, but periodontitis cannot be cured by scaling alone. To cure periodontal disease, further professional treatment should be performed after scaling. Tooth cleaning is a highly specialized work and the practitioner has to undergo rigorous training to be competent. If the personnel, equipment and professional knowledge are not up to par, it will bring the following problems to the patients: Firstly, only the tartar on the surface of the teeth is removed, while the deeper tartar, which is the most pathogenic, is left behind, and the purpose of preventing and treating oral diseases is not achieved. Second, the cleaning process may damage the gums, especially after the removal of tartar root exposed but not in time for further professional treatment, which will not only make the patient unbearable pain, but also aggravate the condition of periodontal disease. Thirdly, it is very easy to cause cross infection. Therefore, people who want to clean their teeth should go to a regular hospital and find a strictly trained medical staff, so as to avoid the consequences of not being able to clean the teeth but to damage them.