The keyword 牙周病 means periodontal disease or gum disease. 牙周病 is caused by plaque buildup and poor oral hygiene. Early 牙周病, called gingivitis, causes red and bleeding gums. Advanced stages damage bone and may result in tooth loss. Risk factors include smoking and diabetes. Treatment for 牙周病 includes professional cleaning, scaling, root planing, and sometimes surgery.... https://www.laresdental.com.hk/牙周病/