In dental parlance, the process of filling the root canal after root canal therapy.

Most often, this is done in the United States with gutta percha, a pink, rubbery substance with some barium in it to make it radiopaque, or show up white on x-rays.

In especially straight root canal systems, some dentists used to place silver points. This is no longer the standard of care, but there are individuals out there with them still.