Gums that are not full are associated with tooth extraction, periodontitis, and missing teeth, and can be treated with ultrasonic scaling, periodontal scaling or flap surgery, and dental implants. Gums are not full with the following factors: 1. Tooth extraction: after tooth extraction, because the alveolar bone reconstruction needs some time to be completed, so it takes some time for the gums to return to normal, and at this time, the gums do not need to be treated, and can be restored on their own. 2. Periodontitis: It is mainly caused by the accumulation of food debris and dental calculus, which stimulate the gum tissue and lead to loosening of teeth and gum recession. Periodontal scaling, ultrasonic cleaning, gum flap surgery and other treatments can be given to restore the fullness of the gums. 3. Missing teeth: most of the trauma, periodontal disease caused by simple periodontal flap surgery can not improve the symptoms of gum recession, oral implants can be given to make the gums back to fullness to be repaired. Gums may not be full of other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.