A root canal usually feels much like getting a filling. Local anesthesia numbs the tooth and the area around it, so most people feel pressure and vibration rather than sharp pain. Afterward, the tooth can feel tender for a few days while it heals. The ache people fear most usually comes from the infection itself.
What a root canal actually treats
Under the enamel and the dentin, every tooth has a soft core called the pulp, with nerves and blood vessels. When deep decay, a crack or an old injury lets bacteria reach it, the pulp becomes inflamed or infected. A root canal removes that tissue, cleans the inside of the tooth and seals it, so you keep your own tooth.
The American Association of Endodontists describes the procedure as very similar to a routine filling, because patients receive anesthesia before anything starts.
If you're still not sure whether your symptoms point to the pulp, our guide to the signs you may need a root canal walks through them.
Why the reputation is worse than the treatment
Most people who dread a root canal are remembering the toothache that came before it. An inflamed pulp can throb at night, react to hot coffee for a long time, or hurt every time you bite. That pain is the problem. The treatment is how it gets removed.
Two things can make the visit harder:
- Waiting too long. A badly inflamed tooth can be harder to numb. Being seen early helps.
- Anxiety. Tension makes everything feel bigger. Tell the team if you're nervous; they can explain each step before they do it and stop when you raise a hand. Our article on feeling comfortable at the dentist has more ideas.
What happens in the chair
Every case is different, and your dentist decides the details. In general, a root canal follows this order:
- Diagnosis. The dentist examines the tooth, tests how it reacts and takes an X-ray to see the roots and the bone around them.
- Numbing. Local anesthesia numbs the tooth, the gum and part of your lip or cheek. The dentist checks that it has taken effect before starting.
- Isolation. A thin rubber sheet goes around the tooth to keep it dry and clean. It also keeps water and debris out of your mouth.
- Opening and cleaning. A small opening is made in the top of the tooth. Fine instruments remove the pulp and shape the canals, which are then rinsed with disinfecting solutions.
- Sealing. The cleaned canals are filled with a rubber-like material and sealed.
- Closing the tooth. A temporary or permanent filling closes the opening until the final restoration.
What you feel during most of this: pressure, some vibration, the sound of the instruments and a mouth that stays open for a while. Many people find the jaw gets tired before anything else does.
Some teeth are finished in one visit and others need two, depending on the infection, the number of canals and how the tooth responds. Your dentist will tell you which applies to you.
The first days after a root canal
The numbness usually lasts a few hours. Avoid chewing until it wears off so you don't bite your cheek or tongue.
According to the AAE's post-treatment care guidance, the area may feel tender for a few days as it heals, and you should avoid biting down hard on the treated tooth until it's fully restored. That's normal and different from the deep, throbbing pain of an infected pulp.
What usually helps:
- Chewing on the other side until the final restoration is in place
- Soft foods for the first day or two
- Brushing and flossing as usual, gently around the tooth
- Taking only the pain relief your dentist recommends, as directed
Call your dentist if the pain is severe or gets worse after a few days, if you notice swelling inside or outside your mouth, or if the temporary filling comes out.
Why a crown often comes next
A tooth that needed a root canal has usually lost structure to decay or a crack, and it can be more brittle afterward. Back teeth take the most chewing force, so many of them need a dental crown to protect them from breaking. Your dentist decides whether your tooth needs a crown or whether a filling is enough.
Don't leave the temporary filling in place for months. The final restoration is part of what keeps the treated tooth working.
Questions to ask at your visit
- Is a root canal the right option for this tooth, or are there others?
- Will this take one visit or two?
- Will I need a crown afterward, and when?
- What should I feel in the next few days, and what would be a reason to call?
- Can I go back to work right after?
Where to be seen in South Florida
Art Dental Studio sees adults at three locations, with care in English and Spanish. An endodontist, the dentist who focuses on the inside of the tooth, works in the same clinic as the rest of the team.
Miami / Hialeah (305) 922-2262 · Kendall (305) 395-3330 · Cooper City (954) 233-0707
A tooth that throbs, wakes you up at night or hurts when you bite is a reason to call. For a dental emergency, we offer same-day appointments whenever possible. If you have swelling of the face or neck, a high fever, or trouble swallowing or breathing, go to the emergency room or call 911.
The bottom line
For most people, a root canal feels like a long filling: numb, some pressure, a tired jaw. The tenderness afterward tends to fade over a few days. If a tooth is keeping you up at night, call and have it checked before the infection spreads. Your dentist will confirm whether a root canal is what that tooth needs.
Art Dental Studio has three South Florida locations — Miami / Hialeah, Kendall and Cooper City — with care in English and Spanish. General dentistry, orthodontics, endodontics and periodontics work under one roof, in a clinic directed by Dr. Vivian Menendez.
Frequently asked questions
Does a root canal hurt?
A root canal usually feels much like getting a filling. Local anesthesia numbs the tooth and the area around it, so most people feel pressure and vibration rather than sharp pain. The throbbing pain people fear usually comes from the infected pulp, and the treatment is what removes it.
How long does the tenderness last after a root canal?
The treated area may feel tender for a few days while it heals. Chewing on the other side and avoiding hard bites on the tooth until it is fully restored helps. Call your dentist if the pain is severe, gets worse after a few days, or comes with swelling.
How many visits does a root canal take?
Some teeth are finished in one visit and others need two. It depends on the infection, the number of canals and how the tooth responds. Your dentist tells you which applies to your case after examining the tooth.
