Periodontitis is one of the common diseases of the human oral cavity. When periodontitis occurs, a large number of bacteria accumulate on the tooth surface and periodontal pocket wall, and the epithelium of the periodontal pocket wall is thinned and the structural integrity of the surface is damaged, forming an erosive ulcerated surface. In patients with moderate to severe periodontitis, the area of ulcers in the periodontal pockets can be as high as 72 cm2, which is equivalent to the area of an adult’s palm, imagine the human limbs or abdominal skin has this large area of ulcers, people must pay attention to early and active treatment. When there is a large buildup of bacteria on such a large broken surface in the periodontal pocket, daily chewing activities can cause bacteria and toxic products to enter the blood circulation, increasing the risk of systemic disease. Recent studies have shown that periodontitis has become a risk factor for a number of systemic diseases that directly threaten systemic health! These include cardiovascular disease, diabetes, pregnancy, digestive disorders, etc.