Collagen plugs will disappear over time in dental cavities. Collagen plugs are mainly used to fill the wound and stop bleeding after tooth extraction or dental implantation, which can effectively prevent wound infection and secondary bleeding. Collagen plugs have good histocompatibility and complete absorbability, which is conducive to the absorption of exudate from human tissues after tooth extraction, and can be degraded and absorbed in the patient’s body. Generally, due to the different parts of the extracted teeth and the size of the trauma opening, the degradation time will be different, and most patients will have the collagen plug absorbed in about two months. During this period, the patient’s diet should be light and should not be too hot or too cold. During the treatment period, patients should go to the hospital for regular checkups, and if there is poor wound healing or pain, treatment should be carried out under the guidance of the doctor.