The typical symptoms of periodontitis are gum recession, alveolar bone resorption, and eventually tooth loosening and loss. The best treatment is periodontal systemic therapy, often called scaling, which is a method of cleaning periodontal plaque and calculus through ultrasonic combined with water rinsing. However, scaling alone is not sufficient for cases where periodontitis has led to bone resorption. Because there is already subgingival tartar, scaling alone can not completely remove the subgingival tartar, then it is necessary to add subgingival scaling, combined with root planing, to remove the subgingival tartar, and at the same time, if possible, periodontal surgery can be performed to maintain the periodontal attachment and periodontal hygiene.