The cavity after tooth extraction can be treated in the following ways: 1. If the cavity is small, it can be treated without special treatment, just pay attention to oral hygiene, do not eat spicy and stimulating food, and it will grow slowly. 2. If the cavity is large, it can be filled with iodoform and gelatin sponge, and if necessary, oral anti-inflammatory drugs are needed to reduce inflammation. 3. If the cavity is large and deep, it needs to be filled with gelatin sponge and iodoform, and tight sutures are needed. In the case of particularly large individual cavities, bone powder filling and intensive suturing are required. If the front teeth have good bone volume and periodontal conditions, immediate implantation can be done after tooth extraction.