Root Canal — Procedure, Pain and Cost

Quick summary

A root canal is a treatment where the dentist removes infected or inflamed tissue (pulp) from inside the tooth and fills the root canal to save the tooth. The procedure is done under local anaesthesia and is no more painful than a standard filling. The cost typically ranges from 4,000 to 10,000 NOK depending on the tooth's location and complexity. Root canal treatment is almost always preferable to extraction because you keep your natural tooth.

What is a root canal?

Inside every tooth there is soft tissue called pulp, which contains nerves and blood vessels. When the pulp becomes infected or damaged — for example from deep decay, a crack in the tooth, or repeated dental treatments — it can lead to severe pain, abscess and in the worst case the spread of infection.

A root canal (endodontic treatment) involves the dentist removing the diseased pulp, cleaning and disinfecting the root canals, and then filling them with a rubber-like material called gutta-percha. The tooth is sealed and built up, usually with a crown to provide strength and protection.

When do you need a root canal?

Common signs that you may need a root canal:

• Persistent toothache that will not go away, especially throbbing pain
• Prolonged sensitivity to hot or cold that lingers after the source is removed
• Swelling in the gum near a specific tooth
• Dark discolouration of the tooth
• Pus collection or fistulas on the gum
• Pain when chewing or pressing on the tooth

Not all of these symptoms mean you need a root canal. Your dentist will make a diagnosis using X-rays and a clinical examination.

How a root canal works step by step

1. Anaesthesia

The dentist administers local anaesthesia around the affected tooth. You should not feel pain during the procedure.

2. Isolation

A rubber sheet (rubber dam) is placed around the tooth to keep it dry and prevent bacteria from saliva contaminating the root canal.

3. Opening the tooth

The dentist drills a small opening through the crown of the tooth to access the pulp chamber and root canals.

4. Cleaning and shaping

Using thin, flexible instruments, the dentist removes the infected tissue and thoroughly cleans the root canals. The canals are rinsed with disinfecting solutions and shaped so they can be filled effectively.

5. Filling the canals

The cleaned canals are filled with gutta-percha and sealed with a cement material to prevent reinfection.

6. Build-up and crown

The tooth is built up with a filling material. In most cases the dentist recommends a crown to protect the tooth from fracture, especially on molars that bear significant chewing pressure.

Does a root canal hurt?

The reputation of root canals as extremely painful is outdated. With modern anaesthesia techniques and instruments, the experience is comparable to getting a standard filling. Most patients report that the pain they had before the treatment was far worse than the procedure itself.

After treatment you may experience mild tenderness in the area for 2-3 days. This is usually managed with ibuprofen or paracetamol. Contact your dentist if the pain is severe or lasts more than a week.

How much does a root canal cost?

The price depends on which tooth is being treated, as the number of root canals varies. Here are typical price ranges in Norway (updated March 2026):

Tooth	Number of canals	Price range (NOK)
Front tooth (incisor)	1	4,000 - 6,000
Small molar (premolar)	1-2	5,000 - 8,000
Large molar	3-4	7,000 - 10,000
Crown after root canal	—	5,000 - 12,000

Root canal treatment is generally not covered by HELFO (the Norwegian health reimbursement scheme) for adults, but children and young people under 18 receive dental treatment free of charge through the public dental health service. Some insurance plans may cover part of the cost.

Root canal or extraction?

Dentists almost always recommend preserving the tooth rather than extracting it. Here are the differences:

	Root canal	Extraction
Preserves natural tooth	Yes	No
Treatment time	1-2 visits	1 visit
Total cost	4,000-10,000 NOK + crown	1,500-3,000 NOK + replacement
Replacement tooth needed	No	Yes (implant, bridge or denture)
Long-term cost	Lower	Higher with replacement

Extraction is appropriate when the tooth is too damaged to save, in cases of vertical root fracture, or if the bone support around the tooth is severely compromised.

After treatment

• Avoid chewing on the treated tooth until the permanent crown is in place
• Brush your teeth as normal, but be gentle around the area for the first few days
• Take painkillers as needed — ibuprofen is usually sufficient
• Attend your follow-up appointment as scheduled with your dentist
• Contact your dentist immediately if you experience significant swelling, fever, or worsening pain

Find a dentist on Flextooth

Use Flextooth to find a dentist near you who performs root canal treatment. Compare clinics and book an appointment easily.