If the gums are receding and the teeth are loosening due to periodontitis, scientific and standardized periodontal treatment is needed, such as supragingival scaling, subgingival scaling, loose teeth fixation and surgical treatment. There are many suitable drugs, mainly antibacterial drugs, such as amoxicillin capsules, metronidazole tablets, roxithromycin tablets, etc. 1. supragingival scaling and subgingival scraping: Most of them are done by using ultrasonic scaling machine, which mainly uses the principle of ultrasonic vibration to remove the calculus and plaque on the gums and in the periodontal pockets, or you can consider using manual scaling and scraping devices to remove the calculus and plaque. This is followed by local rinsing with 0.9% sodium chloride solution, 3% hydrogen peroxide solution, and iodine glycerin. If the periodontal pocket is deep, it is recommended to inject antibacterial drugs, such as minocycline hydrochloride, into the periodontal pocket; 2, loose teeth fixed: loose teeth fixed in many ways, such as the use of elastic fiber belt plus photosensitive resin fixed loose teeth, make and wear fixed, or removable restorative splints; 3, surgical treatment: periodontitis, if developed to a certain extent, simply through the basic treatment is often ineffective, so The surgical treatment of periodontal soft and hard tissues is also required to achieve good results. Commonly used surgical procedures include gingivectomy, flap surgery, and periodontal guided tissue regeneration. In addition, systemic antibacterial medications are required to prevent infection during treatment. Commonly used clinical drugs include metronidazole tablets, a nitroimidazole drug, doxycycline hydrochloride tablets, a tetracycline drug, and amoxicillin capsules, a penicillin drug. Macrolides such as roxithromycin tablets.