Root canal treatment is the last resort in case of dental pulp inflammation caused by caries or overloading of the tooth, as well as due to malocclusion or occlusal disease. Under effective anesthesia and after removing inflamed tissues from the tooth canals, the doctor fills them very tightly with the appropriate material using a special device. The dentist uses a microscope in order not to miss any small canals, invisible to the naked eye. The entire root canal treatment procedure is performed with the use of a rubber dam, which isolates the treated tooth from the oral environment. The treatment is then safe and comfortable for the patient, because all the medications administered to clean the dental canals and destroy bacteria do not enter the mouth and throat.