A root canal is what allows a tooth to stay when the pulp inside has been damaged or infected.
Done well, it's not the painful procedure people remember from decades ago. It's calm, predictable, and it lets the tooth keep functioning instead of being extracted.
§ 00 · What a root canal actually does
When decay or a fracture reaches the pulp inside a tooth, the pulp can become inflamed, die, or become infected. Left untreated, infection can spread into the surrounding bone and the tooth may be lost.
Root canal treatment cleans and disinfects the canal system inside the tooth and seals it. A durable final restoration is then placed on top — often a crown for back teeth, sometimes a bonded restoration for front teeth with enough remaining structure.
Pain relief
Root canal treatment removes inflamed or infected pulp. The pain that led to treatment usually improves as the surrounding tissues heal, though temporary soreness or tenderness can occur afterward.
Save the tooth
A treated tooth keeps doing its structural job in the bite.
Long-term function
With an appropriate final restoration, root-canal-treated teeth commonly last many years.
§ 01 · Why we plan around the bite
A root-canal-treated tooth — especially a back tooth that has already lost substantial structure from decay, fracture, previous restorations, or the treatment itself — can be more vulnerable to fracture. How much healthy tooth structure remains and the forces placed on the tooth are important parts of planning the final restoration.
Molars and premolars commonly need a crown to protect them under chewing forces. Some front teeth may be restored without a crown when enough healthy structure remains. We choose the restoration based on the tooth's location, condition, remaining structure, and bite.
§ 02 · How we plan a root canal
We confirm the diagnosis first, treat carefully under local anesthetic, and protect the tooth with a crown afterward.
Step 1: confirm the source
We test the tooth to make sure the pulp is the actual cause of the symptoms before treating. The wrong diagnosis leads to the wrong treatment. When a filling or crown is enough to preserve the tooth, we say so directly.
Step 2: treat under local anesthetic
The procedure is comfortable. We clean and disinfect the canal system, seal it, and protect the tooth with a temporary restoration while it heals.
Step 3: place the final restoration
After the root canal, the tooth needs a durable final restoration. For most posterior teeth (molars and premolars), that means a crown. For some front teeth with enough remaining structure, a bonded restoration can be enough. We plan the restoration based on the tooth's location, condition, and bite forces.
§ 03 · Common questions
How much does a root canal cost?
Cost depends on the tooth (back teeth have more canals and cost more) and the final restoration that follows. We confirm the full plan and out-of-pocket estimate before any treatment. Most PPO plans cover a meaningful portion of root canal therapy.
Are root canals painful?
The procedure itself is comfortable — modern technique and local anesthetic keep the tooth numb throughout. Most patients describe it as similar to a long filling. Temporary soreness or tenderness afterward can occur while the surrounding tissues heal.
How long does a root canal take?
Most root canals are completed in one or two visits. A single appointment is typically 60–90 minutes. A follow-up visit is needed afterward to place the final restoration that protects the tooth.
Will my tooth still feel normal after a root canal?
Once inflammation settles, a treated tooth typically feels and functions like any other. It can chew normally and no longer has temperature sensitivity from the pulp (because the pulp is gone). Full recovery of the surrounding tissues can take some time.
What's the success rate of root canals?
Reported success rates for well-performed root canal therapy are high — commonly reported in the 90 percent range at long-term follow-up in the endodontic literature. Long-term outcomes depend on the diagnosis, the case itself, the final restoration, and how bite forces are managed.
Is extraction better than a root canal?
When a tooth is predictably restorable, preserving the natural tooth is often preferred. Extraction can be the better option when the tooth cannot be predictably restored, has certain fractures, lacks adequate support, or has other conditions that make long-term retention unlikely. The decision depends on the individual tooth.
Does KYT do all root canals in-house?
Dr. Sun performs many root canals in our Fountain Valley office, including selected molars. More complex molar cases are referred to an endodontist. KYT does not perform root canal retreatments; all retreatment cases are referred to an endodontist.
Second opinion
If you were told you need a root canal or extraction elsewhere and want to understand the reasoning before committing, KYT offers a structured second opinion consultation.
Learn about second opinionsAvailable at
We'll evaluate the actual situation, walk through alternatives if root canals aren't the right answer, and give you a clear plan with cost before anything is scheduled.
