If you have been told you need a root canal, one of the first questions is usually how long it will take. The short answer: many root canals are completed in one or two appointments, each typically lasting 60 to 90 minutes. Back teeth take longer than front teeth, and a few factors can add a second visit.
Here is what to expect, from the first appointment to feeling back to normal.
Typical appointment length by tooth
The main factor is how many canals the tooth has. Each canal is a narrow channel inside the root that has to be cleaned, shaped and sealed.
| Tooth | Usual number of canals | Typical appointment time |
|---|---|---|
| Front teeth (incisors, canines) | 1 | About 45 to 60 minutes |
| Premolars | 1 or 2 | About 60 to 75 minutes |
| Molars (back teeth) | 3 or 4 | About 75 to 90 minutes or more |
These are general ranges. Your own appointment may be shorter or longer depending on the tooth.
One visit or two?
Many root canals are finished in a single appointment. A second visit is more likely when:
- There is an active infection or abscess. Medication may be placed inside the tooth for a week or two to settle the infection before the canals are sealed.
- The canals are curved, narrow or calcified, which takes more time to clean and shape safely.
- The tooth is being retreated, meaning a previous root canal needs to be redone.
- You would prefer shorter appointments. Some people find two shorter visits easier than one long one.
What happens during the appointment
- Numbing. The area is thoroughly numbed with local anaesthetic before anything begins.
- Isolation. A small sheet called a dental dam keeps the tooth clean and dry, and stops you swallowing any solutions.
- Access. A small opening is made in the top of the tooth to reach the pulp inside.
- Cleaning and shaping. The inflamed or infected pulp is removed, and each canal is cleaned, disinfected and shaped.
- Sealing. The canals are filled with a rubber-like material and sealed.
- Temporary or permanent filling. The opening is closed. Back teeth usually need a crown afterwards to protect them.
Many people are surprised by how routine it feels. With modern anaesthetic, the treatment itself is usually no more uncomfortable than a large filling.
Do I need a crown afterwards?
Back teeth, which take heavy chewing force, usually need a crown after a root canal. A tooth that needed a root canal has often lost a lot of structure to decay or a crack, and it becomes more brittle over time. A crown holds it together and protects it from splitting.
A crown is typically a separate appointment, often a few weeks after the root canal. Front teeth can sometimes be restored with a filling instead.
Root canal recovery: what to expect
The first day
Your lip, tongue and cheek will be numb for a few hours. Avoid chewing until the numbness wears off so you do not bite yourself.
The first few days
It is normal for the tooth and surrounding gum to feel tender, especially when you bite. This usually eases within a few days. Over-the-counter pain relievers, taken as directed by your dentist, are usually enough.
Until the final restoration
Avoid chewing hard or sticky foods on that side until your permanent filling or crown is in place. A temporary filling is not as strong as the final restoration.
Many people go back to work or school the same day or the next day.
When to call your dentist
Call us if you notice any of the following after treatment:
- Swelling inside or outside the mouth
- Pain that is getting worse after the first two or three days, rather than easing
- Your bite feels high or uneven
- The temporary filling comes out
- A rash, itching or other signs of an allergic reaction to medication
Root canal care at Vigée Dental
Saving your natural tooth is usually a conservative option, and a root canal is often what makes that possible. We explain your treatment and provide a written estimate before treatment begins, so there are no surprises. Learn more about root canal therapy or book an appointment online.
Frequently asked questions
Can a root canal be done in one visit?
Often, yes. Many root canals are completed in a single appointment. A second visit may be needed if there is an active infection or the canals are complex.
How long does pain last after a root canal?
Mild tenderness usually settles within a few days. Pain that gets worse after that, or swelling, should be checked.
Can I go to work after a root canal?
Many people return to work the same day or the next day. You may want to avoid chewing on the treated side until you get your final restoration.
How long does a root canal last?
A well-sealed root canal with a good crown can last for many years, often a lifetime. Keeping the tooth clean and having regular checkups helps it last.