Curettage – gum treatment – cleaning of the periodontal pockets in order to eliminate the gum inflammation center and the main indication for curettage is middle-end periodontitis (the presence of periodontal pockets at a depth of 4-5 mm). In contrast to the professional cleaning of teeth during the procedure of curettage, not only dental deposits are removed, but pathologically altered tissues of periodontal pockets, microorganisms and products of their vital functions. Also, curettage is necessary before surgical intervention, as the infection in the gums during surgery can continue to heal or even lead to an unsuccessful outcome.