Plaque can be removed by brushing, rinsing, flossing, scaling and scraping. 1. Brushing: Pay attention to brushing your teeth carefully every day, at least once a day in the morning and once in the evening, using the correct brushing method and replacing your toothbrush regularly, effective brushing can remove some plaque. 2. Mouthwash: Mouthwash with antibacterial effect can be used to help reduce pathogenic microorganisms in the mouth or inhibit bacterial reproduction and growth. 3. Flossing: By using nylon, silk or polyester floss to effectively clean plaque on the neighboring surfaces of the teeth, it can remove places where toothbrushes cannot, such as the crevices of the teeth, the bottom of the gingival sulcus and other parts of the gums, to assist in cleaning. 4. Scaling: It can effectively remove tartar, plaque and pigmentation through the high-frequency vibration of ultrasonic waves, so that plaque loses the place where it gathers, and it can polish the surface of the teeth to delay the re-deposition of plaque and tartar. 5. Scraping: It is to scrape away the tartar and plaque on the root surface located in periodontal pockets with a fine subgingival scraper.