Generally, a tooth that is half rotten has the opportunity for a filling, depending on the specific situation. Depending on the depth of the tooth and the amount of remaining tooth tissue, fillings, root canals or extractions may be chosen. 1. Fillings: If a patient’s tooth is half rotten and the damage is not very serious, it is recommended that the tooth can be improved through fillings, using ordinary glass ionomer or resin material to repair the tooth, removing the decayed area and then filling it up. 2. Root canal treatment: If the tooth is half rotten and the nerve is violated, but there exists dental tissue with preservation value, it cannot be filled, and it is necessary to carry out root canal treatment to eliminate the inflammation, and then carry out crown restoration. 3. Extraction: If the rotten tooth is deeper, has destroyed the pulp chamber bottom, or bad to the deeper position under the gum, the remaining dental tissues have no retention value, can not be filled, it is necessary to extract the tooth, after extraction, and actively carry out dental restoration. In addition, pay attention to oral hygiene, need to rinse with warm water after eating, rinse out the food debris in the mouth. The specific situation needs to go to the hospital for examination, and then carry out targeted treatment.