Root canal treatment for one decayed tooth will cost around $400~1600, and if you need to use microscope treatment or root canal re-treatment, etc., you need to add around $200 for each root canal, so it is recommended to go to the hospital for specific consultation. Anterior teeth generally have 1 root, do root canal treatment will need about 400 yuan; premolar generally have 2 roots, treatment costs need about 800 yuan; molar generally have 3~4 roots, the cost of about 1,200~1,600 yuan. If there is calcification to do microscopic treatment of 1 root root canal treatment costs need to add about $200; root canal treatment of the tooth has been re-treated again the cost of 1 root to add about $200.