Gums can not wrap around the teeth is usually due to gum recession caused by periodontal disease, usually the teeth and gums may have a large gap, the gums around the gums will have calculus, affixed to the teeth surface and gums, it will be easy to produce redness and swelling of the gums or pus phenomenon. At this point, you can choose to remove the teeth with scaling, to remove large pieces of calculus, and later need to do subgingival scraping, and subgingival scraping can also choose to do ultrasonic shock cleaning, using a sharp working tip, which is conducive to the removal of plaque on the root surface of the teeth. After removing plaque, you can choose to rinse and medication, commonly used rinsing solution is hydrogen peroxide and saline, and can be combined with mouthwash, such as compound chlorhexidine gargle, which can reduce the occurrence of plaque, and at the same time polishing can reduce the rate of plaque adhesion, but also appropriate oral anti-inflammatory drugs, such as amoxicillin or cephalosporin, and with the metronidazole tablets, so that can be anti anaerobic bacteria infection.