It is right to say that the benefits of teeth cleaning outweigh the disadvantages. Scaling is the most basic method of preventing and treating gingivitis and periodontitis. Scaling can remove plaque, food debris and soft tartar adhering to the tooth surface, which can improve inflammation of the gums and alleviate bad breath; it can also improve periodontal inflammation, so that the shrinking gums will gradually reduce and the loosening of the teeth will be improved. Due to the existence of certain differences between individuals, some people will feel tooth soreness after scaling, generally 1~2 weeks after scaling tooth soreness symptoms will gradually improve. This discomfort is due to the operation, for a short period of time, recoverable discomfort. Therefore, the advantages of scaling outweigh the disadvantages. Dental scaling is best to choose to regular hospitals, can effectively avoid cross-infection, but also to avoid the occurrence of some infectious diseases; dental scaling regular oral hygiene check, generally every three months to six months is better.