Root Canal Retreatment

Root canal treatment, also known as root canal therapy, is a procedure to remove the infection from the pulp of the tooth and prevent the decontaminated tooth from future microbial invasion. The pulp of the tooth contains nerve tissues and blood vessels which provides a gateway for the infection to spread throughout the body.

In this procedure, local anesthesia is used to numb the tooth and an opening is made through the crown to reach the pulp chamber. With the help of special files, infectious and unhealthy material is removed from the pulp and then the debris is washed out by irrigating the area using effective irrigative solutions. The cavity is then shaped to accommodate for the filling material. The process involves filling the canal with a permanent material known as gutta-percha which prevents further microbial contamination in the area. Lastly, the opening is sealed by placing a temporary filling material on the top of gutta-percha before a permanent crown is placed over the top of the tooth and cemented.

What is root canal retreatment?

There are chances that the tooth may again develop an infection post the treatment. Improper healing of the tooth can lead to the development of infection which may manifest months or even years after the initial treatment. In such cases, retreatment is required. Root canal treatment failure can be due to inadequate sterilization of the instruments, improper canal preparation, failure to completely remove the infected material, defective obturation and postoperative causes like trauma, fracture, impaired healing, and periodontal disease. The procedure is almost the same as the routine root canal treatment. 

What are the symptoms of a failed root canal treatment?

  • Tenderness or swelling over the treated area.
  • A bump or blister over the treated area inside the mouth.
  • The mobility of the tooth increases.
  • Pain on biting and chewing.
  • Increases sensitivity.
  • Discharge from the area around the treated tooth.

How is root canal retreatment done?


The non-surgical treatment includes disassembly, repair of existing perforations, shaping and disinfection of the canal system and obturation. The procedure is similar to root canal treatment but it has a few extra steps and requires two visits. The first visit consists of anesthetizing the concerned tooth, removing all the root canal filling material and placement of calcium hydroxide, an antibacterial paste. Then the tooth is closed with a temporary filling. Calcium hydroxide is left in place for some time to reduce the number of microorganisms in order to aid in the process of healing. During the second visit, the calcium hydroxide paste is removed and the canals are cleaned thoroughly before being shaped post which a new root canal filling is placed. Finally, in order to close the opening made in the tooth, a temporary filling is placed. Once the tooth is restored, this filling is removed.


Surgical procedures are used in cases where a lot of tooth structure has been damaged and lost and the surrounding gum and bones are destroyed. During this procedure, the infected tooth and the surrounding damaged tissue is removed. The tooth is replaced with a dental implant and the bone defect is closed with a bone graft.

After root canal treatment the patient is advised to see the dentist on a regular basis to ensure proper healing and reduce the incidence of root canal retreatment or tooth extraction.

We, at Bliss Dentistry of Campbell, California, cater to all your needs pertaining to dental services and routine exams. Our Campbell dentists with their entire team persevere to provide you with exceptional treatment that enhances and maintains the beauty of your smile. If you have any further question, queries or dental emergencies and are looking for an experienced dentist in the South Bay Area, feel free to contact us at (408) 963-6678 to schedule an appointment

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1930 South Bascom Avenue, Suite 100, Campbell, CA 95008

Email: [email protected]

(408) 963-6678

Fax: (408) 963-6668

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  • Monday: Closed
  • Tuesday: 9:00 am - 6:00 pm
  • Wednesday: 9:00 am - 6:00 pm
  • Thursday: 9:00 am - 6:00 pm
  • Friday: 9:00 am - 6:00 pm
  • Saturday: Closed
  • Sunday: Closed