An endodontic treatment is to clean out the canals and inject medicine after removing the nerve. The treatment is difficult because each root canal is shaped uniquely and complicated. Also, the nerve is invisible from outside. It is very important to clean up a tip of the root and succeed the treatment in order to save a tooth from an extraction and avoid getting an endodontic disease in the future.
This X-ray shows a tooth that received an incomplete endodontic treatment. It clearly shows that medicine injected (the white part) did not reach a tip of the root. The canals became infected.
During the procedure
The second X-ray is during the procedure. The canals were cleaned using a needle-like tool, called file (the narrow white shadow seen in the X-ray). The step was repeated many times.
The third X-ray is right before finishing up the treatment. It shows that medicine reached to a tip of the root. The treatment cured the infection.
A difficult endodontic treatment would be performed with an endodontist using a microscope.
Amano Dental Clinic