Short answer
Most root canals are finished in one or two visits. A front tooth with a single canal is usually the quickest, while a molar with three or four canals takes longer and is more likely to need a second visit. Most back teeth then need a crown, which takes two visits, with the final crown placed about 5 days after the first.
What happens during a root canal?
A root canal removes infected or inflamed tissue (the pulp) from inside a tooth, cleans and shapes the canals, and seals them so bacteria cannot get back in. The goal is to keep your natural tooth instead of pulling it. Here is how a typical visit goes:
- We take X-rays and numb the tooth with local anesthetic.
- A small protective sheet goes around the tooth to keep it clean and dry.
- We make a small opening in the top of the tooth to reach the canals.
- The pulp is removed, and each canal is cleaned, shaped and rinsed.
- The canals are filled and sealed with a rubber-like material.
- The opening is closed with a filling, either temporary or permanent.
If the infection is heavy, we may place medicine inside the tooth and finish at a second visit. Learn more on our root canal therapy page.
Why do some root canals take longer than others?
Four things make the biggest difference:
- Which tooth it is. Front teeth usually have one canal. Premolars have one or two. Molars typically have three or four, and they sit farther back, so they take longer.
- How much infection there is. A tooth with a large infection or a draining abscess may need medicine left inside between visits.
- The shape of the canals. Narrow, curved or extra canals take more time to find and clean.
- Past dental work. Redoing an old root canal, or working through a large crown or post, adds steps.
How many visits will I need?
| Tooth type | Usual canals | Typical visits for the root canal | Crown afterward? |
|---|---|---|---|
| Front tooth (incisor or canine) | 1 | Often one | Sometimes; depends on how much tooth is left |
| Premolar | 1–2 | One or two | Usually |
| Molar | 3–4 | Often one, sometimes two | Almost always |
| Retreatment of an old root canal | Varies | Often two | Usually |
We do root canals in our office, including on molars. Now and then, a tooth has unusually complex anatomy, and we may refer you to a root canal specialist (an endodontist). We will tell you before we start if that looks likely.
Why do most back teeth need a crown afterward?
Once the pulp is gone, the tooth no longer has its blood supply and becomes more brittle. Back teeth take a lot of chewing force, so a dental crown holds the tooth together and helps keep it from cracking.
A crown takes two visits: at the first we shape the tooth, take impressions and fit a temporary crown, and the final crown is placed about 5 days later, once it comes back from the lab. Avoid chewing hard foods on that tooth until the final crown is in.
Does a root canal hurt?
The area is numbed, so most people feel pressure and vibration rather than pain. Many patients say the procedure is easier than the toothache that brought them in. Our post on why root canals are about relief, not pain explains why. We use local anesthetic only and do not offer sedation.
Afterward, the tooth can feel sore or tender to bite on for a few days. Over-the-counter pain relievers usually handle it. Our post on root canal recovery tips covers what to expect.
Can I go back to work the same day?
Most people can. Your lip and cheek may stay numb for a few hours, so wait to eat until the numbness fades. If you have a long or two-part appointment, a Saturday visit can be easier to fit in; see our Saturday dentist page for Richmond patients.
How much does a root canal cost?
Our self-pay root canal fee starts at $899, depending on the tooth. Crowns start at $1,199. Insurance often covers part of both, and we check your plan before your visit. Full details are on our dental prices page, and you can finance through Cherry, Sunbit or CareCredit.
When to call us
Call us if you have a toothache that lasts for hours, pain when you bite, sensitivity to hot or cold that lingers, a darkening tooth or a bump on your gum. These can be signs the nerve is infected. Same-day emergency visits are available during office hours. Call (832) 612-2831 — we’re open Tuesday, Wednesday and Saturday, 9am–3pm.
Frequently asked questions
Yes, many are, especially on front teeth and premolars. A molar or a heavily infected tooth is more likely to need two visits.
Usually a few hours. Avoid chewing on that side and skip hot drinks until the feeling comes back.
A tooth without its crown is more likely to crack. If it breaks badly, it may not be savable, so try to keep the crown appointment close to the root canal.
An extraction can be quicker that day, but then you have a gap to deal with. Replacing the tooth with an implant or bridge takes more time and money than saving it in most cases.
Sources
This guide is general information, not a diagnosis. Every mouth is different — the right treatment for you depends on an exam.