In rare cases, root canal therapy fails to work as planned. The treated tooth might not heal properly or a patient might experience post-surgical complications that affect the tooth.
Root canal retreatment involves the removal of the previous permanent restoration and packing material, the cleansing of the root canals, and then re-packing the tooth. Thus, root canal retreatment is almost identical to the original procedure, aside from the structural removal. The success rate for a root canal retreatment may be 75%.
Root canal treatments and retreatments can be a good alternative than extraction for most individuals. If a tooth has good bone support, a solid surface and healthy gum tissue, it has a good chance of being saved.
At times, root canal retreatment can be less expensive than the alternatives. Dental implants, extensive bridgework and the creation of esthetically pleasing prosthetic teeth may cost far more than working with the natural tooth. They also require certain maintenance and may feel less natural than a “real” tooth.