Root Canal Retreatment

When you might need this

• Pain or sensitivity returns months or years after a root canal
• Swelling or pus near a previously treated tooth
• A previous root canal where the dentist missed a canal
• Crown or restoration has failed and the underlying canal is infected
• New decay has reached the root canal system of an old treatment

What the procedure involves

1. Detailed evaluation with magnification and X-rays to identify the cause of failure
2. Removal of the old crown or filling
3. Careful removal of the previous root canal filling material
4. Identification and treatment of missed canals (a common cause of failure)
5. Disinfection of the canal system with laser-assisted technique
6. Re-sealing with thermoplasticized obturation
7. New permanent restoration

How long it takes

Usually 2–3 sittings depending on complexity. Retreatments take longer than initial root canals because of the careful work required to access and clean previously treated canals.

Pain expectation

The procedure is performed under full anesthesia and is comfortable. Some tenderness for a few days after is common.

Technology used

• Dental operating microscope (essential for retreatment)
• Ultrasonic instruments for safe removal of old materials
• Dental laser for disinfection
• Digital radiography for low-dose imaging

Recovery & aftercare

Most patients feel significantly better within days. Full healing of bone around the root takes weeks to months and is monitored with follow-up X-rays.

See full post-op care guide →