If you’ve had (or are about to have) a root canal, you might be wondering how long it will last. The good news is that a properly treated and well-cared-for tooth can last a lifetime.

At Eastern Idaho Endodontics, our team has helped thousands of patients in Idaho Falls, Rexburg, Pocatello, Burley, Hailey, Jackson Hole, and Pinedale keep their natural teeth healthy and pain-free for decades after treatment.

Let’s look at what determines the longevity of a root canal and what you can expect 5, 10, and even 20 years down the road.

What Makes a Root Canal “Permanent”?

A root canal removes infected or damaged pulp from inside your tooth, then cleans, disinfects, and seals the space to prevent reinfection. Once complete, a crown or filling restores strength, structure, and appearance.

When done correctly and maintained properly, a root canal is one of the most durable, long-lasting dental procedures available.

Most studies show that 90–95% of root canal-treated teeth are still healthy 10 years later. With a strong crown and good oral care, many last a lifetime.

What to Expect 5 Years After a Root Canal

At the 5-year mark, most patients experience full comfort, no sensitivity, and normal chewing function. The crown remains stable with no cracks or leaks.

If your crown fits well and you maintain regular dental checkups, your treated tooth should feel as strong and natural as ever.

Pro tip: Avoid chewing ice or hard foods — this protects your crown and prevents fractures that could compromise your tooth.

What to Expect 10 Years Later

After 10 years, your tooth should still be stable, but small issues can develop over time, especially if the crown wears down or bacteria sneak in through tiny cracks.

Here’s what to watch for:

  • Crown wear or leakage

  • Discoloration (normal for some teeth, not always a sign of infection)

  • Occasional sensitivity to bite pressure

If discomfort appears after several years, your tooth might just need a simple crown replacement, not a full retreatment.

At Eastern Idaho Endodontics, we use CBCT 3D imaging to check for hidden infections or cracks without guessing — ensuring you get precise, gentle care.

What to Expect 20 Years Later (and Beyond)

With proper restoration and routine care, your root canal-treated tooth can last 20 years or longer. Many of our patients keep theirs for life.

Long-term success depends on:

  • Quality of the original root canal treatment

  • Proper crown placement and fit

  • Oral hygiene habits

  • Avoiding new trauma or decay

If an infection reappears decades later, modern endodontic techniques such as retreatment or apical microsurgery can often save the tooth again without extraction.

How to Make Your Root Canal Last Longer

Here are five ways to maximize your root canal’s lifespan:

  1. Get a crown as soon as possible after treatment.

  2. Brush and floss daily, paying extra attention to the gumline.

  3. See your dentist twice a year for checkups and x-rays.

  4. Avoid grinding your teeth; a night guard can help.

  5. Report new pain or swelling early — small problems are easier to fix.

The Bottom Line

A root canal isn’t just a temporary fix — it’s an investment in keeping your natural tooth for life. With expert treatment, a quality restoration, and consistent care, your tooth can stay healthy and functional well past 20 years.

At Eastern Idaho Endodontics, our specialists use the latest technology and a gentle touch to ensure your root canal stands the test of time.

Protect Your Smile for the Future

If you’re experiencing discomfort in a previously treated tooth or you’re considering your first root canal, we’re here to help. Schedule a gentle, thorough evaluation today and discover why Idaho and Wyoming patients trust us for lasting dental care.