A root canal has a reputation for being painful, but the truth is the opposite. A root canal is what relieves the pain of a deeply infected tooth — and modern techniques make the visit feel a lot like a regular filling. It is almost always better to save your natural tooth with a root canal than to lose it.
What it is
Every tooth has a soft inner space called the pulp that holds nerves and blood vessels. When that pulp becomes infected — usually from deep decay, a crack, or repeated dental work on the same tooth — it can cause severe pain, swelling, and sensitivity. Without treatment, the infection can spread.
Root canal therapy gently removes the infected pulp, cleans and disinfects the inside of the tooth, and seals it. The tooth stays in your mouth and keeps doing its job. After healing, your dentist usually places a crown to protect the tooth long-term.
What to expect
A root canal usually takes one or two visits, depending on the tooth.
- Your dentist or endodontist numbs the area completely — most patients are surprised at how comfortable the procedure is
- A small opening is made in the top of the tooth
- The infected pulp is removed and the inside of the tooth is cleaned
- The space is sealed with a rubber-like material
- A temporary filling closes the tooth while you heal
- At a follow-up visit, we usually place a permanent crown to protect the tooth
You may feel some tenderness for a few days after a root canal — this is normal and usually managed with over-the-counter pain relievers. Most patients are back to a normal day within 24 to 48 hours.
If you are coming to us in pain, we will fit you in as soon as possible. Call us at (626) 246-1200 and tell us what is going on.
Who it’s for
A root canal may be the right answer if you have:
- A throbbing or constant toothache
- Sharp pain when you bite or chew
- Sensitivity to heat or cold that lingers after the heat or cold is gone
- A swollen, tender gum near a specific tooth
- A pimple-like bump on your gum that comes and goes
- A tooth that has darkened compared to the others
- A deep cavity or a tooth that just keeps needing more work
Not every toothache means you need a root canal. Sometimes a smaller cavity, a worn filling, or a clenching habit is the real cause. We will examine the tooth, look at X-rays, and tell you honestly what your options are — including the option to wait, when that is reasonable.
This page is general information about a common dental procedure and is not medical advice. Treatment recommendations depend on each patient's situation — please call us with any questions about your own care.
