Depending on the number of root canals in the tooth, the cost of nerve killing is around 300 to 500 dollars; specific costs are recommended to refer to the local medical institutions. 1. Nerve killing (clinically known as root canal treatment) is one of the routine treatment programs in dentistry, which is mainly used to treat symptoms such as toothache caused by pulpitis or apical periodontitis. 2. The process of root canal treatment includes root canal cleaning, root canal disinfection and root canal filling, the cost of which is mainly based on the specific number of root canals in the tooth; the front teeth generally have one to two root canals and the root canals are thick and easy to operate, the cost is about 300 yuan; while the number of root canals in the back teeth is generally about three and the root canals are thin and curved, which makes the clinical operation relatively difficult, so the cost is about 500 yuan. In addition, the specific cost is also affected by the level of the hospital, geographical area, it is recommended to consult the hospital reception.