Signs of a Dead Tooth: How to Tell If a Tooth Has Died

What a Dead Tooth Actually Is

Inside every tooth is soft tissue called the pulp (the nerve and the tiny blood vessels that keep the tooth alive). When that pulp gets infected or badly injured, it can die. Dentists call this a non-vital or necrotic tooth; most people call it a dead tooth.

The important part: the tooth doesn't fall out or crumble the moment the nerve dies. The hard outer shell can look and work more or less normally for a long time. What changes is underneath, and that's why the signs are easy to miss until they aren't.

The Signs of a Dead Tooth to Look For

These rarely all show up at once. Usually it's one or two, and they build slowly:

• A colour change. A dead tooth often darkens from the inside — grey, brown, or a dull yellow — and stands out against its neighbours. This is the clearest single sign, and it doesn't brush or whiten away.
• Pain that flared, then went quiet. A tooth often aches badly while the nerve is dying, then settles once it's dead. The quiet is not the problem healing. It's the alarm going silent.
• A small pimple on the gum. A little bump near the root, sometimes leaking and refilling, is a sign infection is draining out of a dead tooth. A dental abscess often starts here.
• A bad taste or smell. Pus from an infected dead tooth can leak into the mouth and leave a taste that won't rinse away.
• Tenderness when you bite or press. The tooth can feel sore to chew on, or the gum around it can feel swollen and tender, as the infection pushes on the bone.

If the ache is still coming and going rather than gone, the nerve may be inflamed rather than fully dead. The symptoms that mean a tooth needs a root canal covers that earlier stage.

Why a Tooth Dies in the First Place

A tooth doesn't die for no reason. The pulp gets cut off from what keeps it healthy, and there are a handful of common ways that happens:

• Deep decay. A cavity left long enough reaches the pulp and infects it. This is the most common route. How a tooth infection starts and how it's treated walks through it.
• A knock or injury. A tooth that took a hard hit, in sport or a fall, can die months or even years later, sometimes with no cavity at all. The blood supply gets damaged and the nerve slowly gives out.
• A crack. A split that runs deep lets bacteria reach the pulp. A cracked tooth can go from sensitive to dead if the crack reaches the nerve.
• Repeated dental work. A tooth that's had a very large filling, or been drilled and refilled several times, is under more stress, and the pulp can eventually pack it in.

Does a Dead Tooth Always Hurt?

No, and that's the part that catches people out. Once the nerve is fully dead, the tooth can stop hurting completely, because there's no live nerve left to send the signal. People take the silence as the problem sorting itself out.

It usually isn't. The infection that killed the nerve is still there, sitting at the root, and it can spread into the bone and gum without much warning. Waiting to see whether a quiet tooth settles on its own is usually the more expensive choice, because a tooth caught early can often be saved, while one left for months is more likely to need pulling. What happens if you leave an infected tooth untreated lays out where that goes.

What Can Be Done About a Dead Tooth

A dead tooth has two honest paths, and which one fits depends on how much healthy tooth is left.

Save it with a root canal. The dentist cleans the dead pulp out of the canals, disinfects the inside, and seals it. The tooth stays in place and keeps working. Most teeth that are still structurally sound can be saved this way. What to expect from root canal treatment walks through the visit.

Remove it. If the tooth is broken down too far to rebuild, taking it out and planning a replacement is the more sensible route. Root canal versus extraction compares the two honestly.

People tend to brace for the worst with a root canal and are often surprised. One patient of ours passed on her thanks afterward and said she felt great; her own mother, a dentist, looked at the photos from the procedure and was impressed with the work. Whitening won't fix the colour of a dead tooth, by the way, because the stain comes from inside. That's handled separately once the tooth itself is treated.

When It's Urgent and When It Can Wait

Not every dead tooth is a middle-of-the-night emergency, and it helps to know the difference.

Go straight to a hospital emergency room, not a dental chair, if you have swelling that is spreading across the face, closing an eye, or reaching the neck; trouble swallowing or breathing; or a fever alongside facial swelling. Those are signs an infection is moving beyond the tooth, and that's a medical emergency, not a dentist-in-the-morning problem.

Short of that, a dead tooth still needs seeing, but a grey tooth with no pain and no swelling can usually wait for a normal appointment in the next few days rather than an urgent late-night visit. If there's pain keeping you up, or a bump on the gum that keeps coming back, get it looked at sooner. Handling a toothache at night covers getting through until you can be seen.

If a tooth has changed colour, gone quiet after a bad spell, or grown a bump on the gum, the sensible next step is an X-ray to see whether the nerve has died and whether the tooth can be saved. Call or message us on WhatsApp at 055-985-8845. We're open Sunday to Thursday 8:00 AM to 8:00 PM and Friday 8:00 AM to 2:00 PM, with after-hours emergency treatment outside those hours, and we handle root canal treatment and emergency dental care in Ramat Beit Shemesh. We put the image on the screen and tell you plainly whether the tooth can be kept.

For guidance from sources with nothing to sell, the American Association of Endodontists explains what root canal treatment involves, and the ADA's MouthHealthy covers dental abscesses and why an infected tooth needs treatment.