For soft tartar removal on teeth, it is best to use brushing method, tartar and tartar that cannot be removed by toothbrush can be removed by ultrasonic cleaning or manual scraping. 1. Soft tartar: The soft tartar on the surface of the teeth is generally removed by brushing with a pasteurized toothbrush, and most of the soft tartar can be removed by brushing up and down the surface of each tooth for 3 to 5 minutes, while flossing the neighboring surfaces of the teeth. 2. Tartar and dental tartar: For tartar and dental tartar that cannot be removed by brushing, the clinic generally uses ultrasonic cleaning method to remove the tartar or pigmentation from the teeth by shaking, and can also use the hand scraper to scrape. It is recommended to go to the hospital for ultrasonic cleaning every six months to a year. If you have periodontal disease, you will need to increase the frequency of cleanings as prescribed by your doctor.