Tooth nerve pain. The most common treatment is root canal therapy, which usually requires 2-3 visits. The general approach is for the doctor to open the pulp chamber with a drill, unblock the root canal, and seal the root canal for sterilization. Some doctors will seal the deactivated nerve during the first visit, and finally the doctor will use dental cement and root canal paste to seal and fill the entire tooth tissue tightly. In general, root canal filling for anterior teeth is roughly around 300-500 RMB. The posterior teeth are roughly around $800-1000. In some big cities and hospitals, the price can even reach about $1500.