A Cracked Tooth With a Dead Nerve: Worth Saving?

Quick answer: A tooth with both a crack and a dead nerve has a guarded prognosis — meaningfully worse than either problem alone. It is often still worth treating, but you should be given honest odds and a staged plan rather than a confident promise.

The call

Uri, 49, from Moshav Mahseya, had been getting sharp pain on chewing for months and had recently started getting a dull ache at night. Two symptoms, two different problems, and both had arrived in the same tooth.

He asked the question people rarely ask so directly: what are the actual chances this works?

What we found

Lower right second molar. A crack running across the biting surface from front to back, visible once the old filling was removed and stained with dye. It ran down the wall on the tongue side and disappeared below the level we could see.

The nerve was dead — no response to cold or electric testing — and there was tenderness to tapping with early changes at the root tips.

That combination is the difficult one. A cracked tooth with a healthy nerve, crowned promptly, does well. A dead nerve without a crack, root treated and crowned, does well. Both together means bacteria have a route into the tooth that a root canal does not seal, because the crack runs through the tooth structure rather than the canal system.

The two questions that determine the answer:

How deep does the crack go? We probed the gum around the whole tooth. Pockets were 3mm on every surface except one narrow 6mm defect on the tongue side, following the crack line. Narrow and 6mm is borderline. Had it been 10mm or more, the answer would have been extraction.

Does the crack involve the pulp floor? Under magnification, once the pulp chamber was opened, the crack could be seen crossing the chamber floor between two canal orifices. That is a poor sign — it means the crack has separated the tooth internally.

What we did

We told him the truth: this tooth had perhaps a fifty-fifty chance of lasting five years, possibly better with a bonded crown and careful bite management, and there was a real possibility of paying for the whole sequence and losing it anyway. The alternative was extraction now, and an implant.

He chose to try. Given that he was 49 with an otherwise healthy mouth, that was a reasonable choice.

We staged it deliberately. Root canal first, sealing the canal system as thoroughly as possible and bonding the pulp chamber floor. Then a temporary crown to protect it, worn for three months rather than three weeks. If the tooth was going to declare itself — persistent bite pain, deepening pocket, the crack propagating — it would do so in that window, before he had paid for a permanent crown.

The outcome

At three months the pocket had reduced to 4mm and he was chewing normally. We fitted a permanent crown that covered every cusp with a snug band around the tooth.

Three years on it is still functioning. It may not reach ten. He knows that, and he decided with the information in front of him, which is the point of this story.

What to do if this happens to you

1. Ask for the prognosis in plain terms, and ask what "guarded" means in years.
2. Ask how deep the crack goes and whether it crosses the pulp chamber floor.
3. Ask about staging — a longer temporary phase before committing to a crown is often sensible.
4. Ask what extraction and replacement would cost, so you are comparing real numbers.
5. Chew carefully and consider a night guard. Grinding will finish a cracked tooth.
6. Accept that this is a judgement call. Both choices can be right.

Facing a save-or-extract decision? Ramat Beit Shemesh Urgent Dental Care gives you the odds, not a sales pitch. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh.

Based on real cases treated at the clinic. Names have been changed.