A tooth rotten with a big hole with black color is mostly due to a huge defect of the tooth caused by caries, and this situation needs to be treated by dentistry. If the tooth is not rotten to the pulp, the cavity can be filled to ensure the good shape of the tooth. If the damage of the tooth has obviously involved the pulp and even caused pulp necrosis, it is necessary to secure the affected tooth by means of root canal treatment, and at the same time, after the root canal treatment, it is recommended to make a partial crown restoration on the affected tooth to make the affected tooth serve us better and longer. If it causes a particularly large black contamination, sometimes it is necessary to extract the affected tooth.