Need For Root Canal Retreatment
Root canal retreatment is performed when the patient has undergone unsuccessful root canal therapy. The reasons for such failure may be any of the following:
a. Incomplete Cleaning
Proper cleaning and sealing of the root canals is a must to make the root canal therapy successful. In certain cases, the irritants inside your tooth may remain inspite of thorough cleaning and cause pain. This usually happens when the canals are very narrow, curved or hardened, making it difficult to clean with regular instruments.
b. Leakage
Decay or loss of restoration from the tooth above the level of bone can lead to leakage from the top of the tooth. This lets in bacteria that enter the roots and disrupt the sealer.
Steps of Root Canal Retreatment
To begin with, a local anesthetic is given and a rubber dam placed around the affected tooth. Mostly, the retreatment takes 1-3 visits, depending on the degree of infection and difficulty of treatment required.
Step 1: By making an opening in the restoration area, the old filling material is removed. This is done with the help of advanced endodontic tools and a microscope for better vision.
Step 2: The next step involves removal of Post and other obstructions with a post remover. An ultrasonic hand-piece can also be used to loosen the post.
Step 3: A softening agent may be used to remove the old root canal filling. For cleaning the canals, tiny instruments are used. Irrigants are also utilized to flush out debris and dissolve any material left from the initial treatment. If the procedure remains incomplete in one visit, the canals are medicated along with a temporary placement in the opening to protect the tooth.
Step 4: Once the cleaning process is complete, Gutta Percha is filled in the root canals. To seal them against bacteria, cement is used. After endodontic retreatment, the specialist will take X-rays to check whether the cleaning and filling of canals is done properly.
Follow-up Of Root Canal Retreatment
It is best to get your tooth examined every 6-12 months after root canal retreatment. This helps in verifying whether the endodontic therapy is effective and the tooth has healed.