Root Canal Retreatment

In rare cases, root canal therapy fails to work as expected. 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 root canals, 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. The success rate for a root canal retreatment runs at around 75%.

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. Opting for root canal retreatment can be far less expensive than the alternatives. Dental implants, extensive bridgework and the creation of aesthetically pleasing prosthetic teeth cost far more than working with the natural tooth. They also require maintenance and feel less natural than a “real” tooth.

Why is root canal retreatment required?

Though the prospect of more endodontic surgery might not be pleasant, root canal retreatment 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 dam. The dam protects 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. This removal is conducted using an ultrasonic handpiece. The advantage of using this tool is that any unwanted material is vibrated loose. 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.

If you have any questions or concerns about root canal retreatment, please ask your dentist.

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Testimonials

Dr. Peters has been my dentist since I was 15 years old and his father was my orthodontist. Dr. Peters comes from a legacy of the most gifted professionals in his field. He is highly respected. To his credit, my daughter, two sons, mother, sister… My entire family trusts, only, Dr. Peters for all their dental needs. Hands-down, he is the best in his profession.
Although we still live in Fresno, we drive four hours away to see Dr. Peters. My family's teeth are exceptionally beautiful! We wouldn't trust no one else to touch our teeth! Jealous as we may be of those who live in beautiful San Diego, we are willing to share him with you. Enjoy! :)

Cynthia B.

I first went to Dr Peters for a tooth ache. He saw me on a Sunday! His office is open every Saturday and Sunday which is very convenient for me since I work during the week. His staff was very welcoming. It turned out all I needed was a filling which they did for me that day. He is a perfectionist and very gentle. I love my new dentist.

Dana N.

My mom, Maryam Bahriny, has been going to Dr. Peters for the past year or so. She was so impressed with the quality of care and the treatment she received from the dentist and his staff that she recommended them to the rest of the family and friends. We all feel blessed to have found this office. The beauty of this office is that their number one focus is addressing concerns and treating patients with the highest quality yet the least expensive way. We completely trust this office with our dental needs.

Sahar B.

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