A filling is usually charged at$120 if it is simply a one-time filling to treat caries. Many patients refer to root canal treatment as a filling. The process of root canal treatment is more complicated than a one-time caries filling treatment, with several follow-up appointments, including root canal preparation, root canal disinfection, root canal filling, and later restoration of the tooth, which can be restored with resin or a full crown. Generally speaking, if the tooth after root canal treatment has a large defect, it is recommended to have a full crown restoration. Root canal fillings cost more, usually a few hundred for front teeth, plus the cost of a full crown. The back teeth are usually going to be over$500-600, and the cost of having a full crown is going to be charged at a different price depending on the material chosen. The average regular porcelain crown is over$1,000, while a full crown that is going to be good may range from$2,000-4,000.