Once the nerve is removed, what is the remaining canal(s) filled with?
The best and preferred root canal filler is gutta percha, a natural rubber-like substance derived from the sap of a tropical tree. It shapes itself to fit inside the canal and seals off the hole in the root tip. It can also be easily removed if necessary. If the canals are not filled, the body will fill them itself—with a stagnant organic debris and bacteria, causing the bone outside the root to abscess and requiring the root canal to be started all over again.
