The sutures can be removed about a week after the tooth extraction. If the patient finds the sutures left in the mouth by himself, he can visit the dentist again and let the doctor remove the sutures, which will not have much effect on the healing of the tooth extraction wound. If the patient misses the time to remove the sutures, the sutures are a foreign body in the mouth and are prone to the growth of plaque, which is not conducive to the healing of the extraction wound. It takes 3 months for the cavity to be completely flattened, so the patient must brush the cavity deliberately when brushing, but must brush gently and not with too much force, which may cause damage to the gums.