Root Canal Retreatment
In rare cases, root canal therapy may need to be completed again. Our dentists will provide root canal retreatment to ensure your tooth is properly sealed and corrected.
What is Root Canal Retreatment?
The treated tooth might not heal properly or a patient might experience post-surgical complications that jeopardize the tooth. Root canal retreatment involves the removal of the previous crown and packing material, the cleansing of the roots, and the re-packing and re-crowning of the tooth. In short, root canal retreatment is almost identical to the original procedure, aside from the structural removal.
Root canal treatments and retreatments are a better alternative than extraction for most individuals. If a tooth has good bone support, a solid surface and healthy gums beneath it, it stands a good chance of being saved.
Why is root canal retreatment required?
Though the prospect of more endodontic surgery might not be pleasant, root canal retreatment may be required to save your tooth and is fairly simple. In general, the whole treatment can be completed in 1-3 visits.
There are a number of reasons why root canal therapy unexpectedly fails, including:
- Cracked crown leaking filling material
- Curved or narrow canals not treated during the original procedure
- Delay in the placement of restorative devices following the procedure
- New decay to the tooth
- New fracture in the treated tooth
- Saliva entering the restorative structure
- Undetected complex canal structures
What does root canal retreatment involve?
On the day of the retreatment procedure, a local anesthetic will be administered, unless another type of anesthetic has been selected. The affected tooth is isolated with a rubber sheet to protect the tooth during treatment from bacteria and saliva. The amount the dentist can do within a single appointment will much depend on the amount of inflammation present and the complexity of the treatment.
The first step in a root canal retreatment is to gain access to the inner tooth. If a crown and post have been placed, these will be removed.
Next, filling material and obstructions that block the root canals will be removed. Tiny instruments will then be used to clean and reshape the root canals. X-rays may be taken to ensure that the roots are thoroughly clean. If this part of the treatment proves to be complex, medicated packing material will be applied and the rest of the cleansing procedure will be done at the next visit.
When the dentist is confident that the root canals are completely clean, gutta-percha is used to pack the space. This rubbery material seals the canals to prevent bacterial invasion. Finally, a temporary crown or filling is applied to tooth. At a later date, the color-matched permanent crown will be placed.