Root Canal Infection
Infection inside a tooth's root canal can cause pain and swelling, and needs treatment to save the tooth.
What is root canal infection?
When bacteria reach the pulp inside a tooth, it becomes inflamed and infected. Sometimes a tooth that had root canal treatment years ago becomes reinfected.
Common causes
- Deep decay
- Cracks
- Trauma
- Leaking old fillings or crowns
Symptoms
- Lingering sensitivity
- Throbbing pain
- Pain when biting
- Swelling or a gum pimple
- Darkened tooth
How we treat it
Root canal treatment removes the infection and seals the tooth. A previously treated tooth may need retreatment or specialist care.
Treatments that can help
Root Canal TreatmentRoot canal treatment removes infection from inside a tooth so it can be kept…Dental CrownsA crown covers and protects a weakened or heavily filled tooth, restoring its…Tooth ExtractionWhen a tooth cannot be saved, we remove it carefully and talk you through your…
Frequently asked questions
Can a root-canal-treated tooth get infected again?
Yes, occasionally. Retreatment is often possible.
Do I need antibiotics?
Only if the infection is spreading. Treating the tooth is what removes the infection.
Is it urgent? Call us the same day for severe pain, swelling or a knocked-out tooth. If swelling affects your breathing or swallowing, go to your nearest hospital emergency department or call 000.