Oral calculus cleaning process mainly includes supragingival ultrasonic cleaning and subgingival manual scraping. 1. Gingival cleaning: the main process of ultrasonic high-frequency vibration to remove the gingival calculus, plaque and pigmentation, and polish the surface of the teeth to delay plaque and tartar redeposition. After scaling generally also need to carry out local rinsing medicine, anti-inflammatory convergence. 2. Subgingival scraping: the main process is to scrape away subgingival calculus with manual scraper, flatten the root surface, remove the irritants that cause gingival inflammation; if the periodontal pockets are deeper or the patient is more sensitive, the treatment can be completed under anesthesia; after scraping, the periodontal pockets can be rinsed with 3% hydrogen peroxide or 0.12% chlorohexidine, and if the individual periodontal pockets are deeper, the pockets can be localized with medication.