Root canal treatment for upper teeth may require a treatment fee of about $400 to $1600, if it is a difficult root canal using a microscope or root canal retreatment may require an additional $200 to $800 or so, it is recommended to check and consult with the hospital specifically. The cost of root canal treatment is usually determined by the number of root canals inside the tooth, and the cost will be increased in some special cases. Upper front teeth usually have one root canal and the treatment cost is around $400. Some maxillary premolar teeth have two root canals, commonly found in the first maxillary premolar, and the cost of treatment is around $800. Maxillary molars usually have three or four root canals and cost around $1,200 to $1,600. In the case of special treatments such as root canal calcification, root canal re-treatment, and the use of a microscope for root canal stenosis, the cost of treating one root canal increases by about $200.