You can brush your teeth on the same day of subgingival scraping. 1. Subgingival scraping is to use the subgingival scraper to scrape away the calculus and plaque on the root surface of the periodontal pockets, and at the same time to scrape away the infected diseased dentin on the root surface, and to remove some of the calculus and toxins embedded in the dentin. Generally, you can brush your teeth on the same day of subgingival scraping, the main purpose of which is to brush off the food debris and soft dirt attached to the neck of the teeth after meals, but if the affected area is more serious, you should avoid brushing your teeth here. 2. Generally, hemostatic drugs will be used after subgingival scraping, so do not rinse your mouth or drink water for half an hour. After brushing your teeth on the same day, you can rinse your mouth with lukewarm water or use mouthwash containing chlorhexidine. Be sure to brush your teeth gently with a toothbrush so as not to cause gum discomfort or aggravate the discomfort after treatment. After the surgery, you should avoid eating food that is too cold, too hot, too acidic or too sweet, so as not to cause tooth soreness. It is recommended that you go to the hospital regularly to check the health of your teeth, use the correct brushing method in your daily life, and develop a good habit of brushing your teeth in the morning and evening to avoid the recurrence of periodontal disease, and follow your doctor’s instructions for the use of medication.