There is no way for a cavity to heal on its own, because once a tooth is damaged, it needs to be treated with a filling in order to restore the shape of the tooth. Enamel and dentin are not renewable, so patients must protect their teeth. For early decay, it is necessary to carry out filling treatment in time, because the risk of pulpitis will be greatly increased with the aggravation of decay. At present, there are more filling materials that can be used, and the performance is better, and the color and hardness are very similar to the teeth, so after the filling treatment, many patients will not find out which position is their own tooth and which position is the filling, it is very simulated. After the filling, the patient can exercise the chewing function normally, which is exactly the same as their own teeth, but once the nerve is injured, the tooth loses its blood vessel and nerve supply, and needs to be restored with a porcelain crown, which is no longer similar to the natural tooth.