The cost of dental treatment for children mainly depends on the type of filling material and whether the caries affects the pulp, ordinary glass ion filling costs 80-200 RMB, ordinary resin costs 200-300 RMB, high-end resin costs 400-500 RMB. Once the decay of baby tooth appears, parents should take the child to hospital immediately for treatment, because the hardness of baby tooth is different from that of permanent tooth, the decay will progress very fast and easily develop into pulpitis, which not only affects the child to eat, but also spreads the inflammation to the apical area and affects the development of permanent tooth embryo. If the pulp is not all infected, you can do live pulpotomy to preserve the apical part of the pulp, the cost is 300-400 RMB, once the pulp is all infected, you need to do root canal treatment, the cost of root canal treatment for baby teeth is charged according to the number of root canals, the front teeth need 200-300 RMB, the back teeth need 500-600 RMB.