Whether periodontitis can be cured actually contains two layers of meaning, one is whether gum recession can go back after cleaning, and the second is whether loose teeth can no longer move after cleaning. The first thing to look at is the cause of gum shrinkage, gum shrinkage is not reversible, the so-called gum shrinkage almost no physiological shrinkage, are caused by pathological reasons, most of the cause is periodontal disease. The gum calculus under the gums is next to the alveolar bone. The body’s usual bones are not close to the bacteria, but the daily intimate contact will lead to a decrease in the amount of alveolar bone, and the lesser gums above will naturally decrease. Scaling will not increase the amount of alveolar bone and gum recession will not go back, but this does not negate the effect of scaling and subsequent subgingival scaling. Scaling removes tartar, plaque and other factors on the teeth that can cause alveolar bone resorption. After the tartar is cleaned out, the gums and alveolar bone do not continue to recede, and what was lost before cannot be made up, but can be prevented from continuing to be lost afterwards, and can stop periodontal disease from continuing to progress. So scaling does not stop the gum recession, but it has other effects.