Root Canal Retreatment: Pain, Procedure, And What To Expect

Root canal retreatment is sometimes required when a previously treated tooth becomes reinfected or experiences complications. In this article, we explore what root canal retreatment entails, why it may be necessary, and how to manage any pain that may arise during and after the procedure.

What Is Root Canal Retreatment?

Root canal retreatment is a follow-up procedure performed when a tooth that has previously undergone root canal treatment becomes reinfected or encounters further issues. During retreatment, a dentist reopens the tooth, removes the previous filling, and carefully inspects the root canals for any remaining infection or structural problems. The canals are then thoroughly cleaned and resealed to prevent future infection.

Why Might Root Canal Retreatment Be Necessary?

Although a root canal treatment is generally highly effective, retreatment may be required in certain cases, including:

• Persistent Infection – Bacteria may remain in the root canals or reinfect the area, causing ongoing pain or discomfort. Retreatment allows the dentist to remove any residual infection.
• Complex Canal Anatomy – Some teeth have complex canal structures that can be difficult to clean entirely during initial treatment. Retreatment enables a more thorough examination and cleaning.
• New Decay Or Cracks – New decay or fractures in the tooth can expose the root canals to bacteria, requiring retreatment to prevent infection.
• Incomplete Seal – If the initial filling did not fully seal the tooth, bacteria could re-enter, leading to infection and the need for retreatment.

Is Root Canal Retreatment Painful?

Concerns about pain can make root canal retreatment seem daunting, but modern dental techniques and anaesthesia ensure a relatively comfortable experience.

Pain During The Procedure

Local anaesthesia is administered to numb the affected area during root canal retreatment, ensuring that you do not feel any significant discomfort. While you may notice slight pressure or movement, the procedure itself should be painless.

Pain After The Procedure

After the anaesthesia wears off, mild soreness or sensitivity around the treated tooth and gums is common. This discomfort should ease within a few days and can be managed with over-the-counter pain relievers, such as ibuprofen. If pain continues beyond a few days or becomes more intense, consult your dentist, as prolonged pain could indicate other underlying issues.

Steps Involved In Root Canal Retreatment

Root canal retreatment is a detailed process aimed at thoroughly cleaning and disinfecting the root canals. Here are the main steps involved:

1. Examination And Imaging – The dentist will begin by examining the tooth and may take X-rays or use other imaging tools to assess the infection or damage. This helps them plan the retreatment procedure.
2. Administering Anaesthesia – Local anaesthesia is applied to numb the area, ensuring a painless experience during the retreatment.
3. Accessing The Tooth And Removing The Filling – The dentist reopens the tooth by removing the crown or filling placed during the initial treatment. This provides access to the root canals.
4. Cleaning And Disinfection – The dentist carefully removes any residual infection, damaged tissue, and debris. Antimicrobial solutions may also be used to disinfect the area and prevent future infections.
5. Refilling And Sealing – After the canals are cleaned and disinfected, the dentist refills them and seals the tooth to prevent further infection. In many cases, a new crown or filling is placed to restore the tooth’s structure and functionality.

Managing Pain And Discomfort After Root Canal Retreatment

Mild pain or soreness following root canal retreatment is normal. Here are some tips to help manage any discomfort:

• Use Pain Relievers As Advised – Over-the-counter medications, like ibuprofen or paracetamol, can effectively reduce pain and inflammation.
• Avoid Hard Or Crunchy Foods – Opt for soft foods for a few days to avoid putting pressure on the treated tooth, which can reduce discomfort and promote healing.
• Maintain Good Oral Hygiene – Brushing gently and rinsing with a saltwater solution can keep the area clean and help with healing.
• Follow Aftercare Instructions – Your dentist may provide specific aftercare guidelines. Adhere to these closely to ensure the best recovery.

Cost of Root Canal Retreatment In Singapore

The cost of root canal retreatment in Singapore varies depending on factors like the complexity of the case, the tooth involved, and whether additional procedures, such as a crown, are required. Generally, the cost starts from around S$2,000. CHAS currently does NOT allow claims for root canal retreatment. It is best to consult your chosen clinic for detailed pricing information.

Consult Our Preferred Doctor On Your Root Canal Surgery

Dr Johnathan Wee is the Clinical Director at Advent Endodontics Inc and a consultant endodontist in Singapore. He focuses on managing dental trauma, endodontic retreatment techniques, and post-endodontic restorative outcomes. He is also formally trained in the use of the surgical operating microscope (SOM) since 1998 as an enabler in his clinical delivery of high quality treatment. 

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