Pain when you bite? It could be a cracked tooth.
Cracks can be hard to find and easy to miss. Under a microscope, with bite tests and dyes, we can often see what an X-ray cannot.
A cracked tooth often hurts when you bite and let go, or when you drink something cold. Whether it can be saved depends on how deep the crack runs.
Examined under a microscope. Options and costs explained before any treatment.
Last updated 17 October 2026
Common signs of a cracked tooth
- Sharp pain when biting, especially when you release
- Sensitivity to cold that comes and goes
- Pain you cannot pin to one tooth
- A visible crack or a chipped cusp
- Gum swelling beside one tooth
What happens, step by step
Look
Careful questions, a bite test, a microscope examination and dye to reveal the crack.
Explain
We show you where the crack runs and what that means for the tooth.
Protect
Many cracked teeth need a crown or onlay to hold them together, sometimes with a root canal.
Review
We follow the tooth to check that it settles.
Not all cracks are the same
Fine craze lines in the enamel are common and usually harmless. A cracked cusp can often be restored. A crack that runs into the nerve may need a root canal and crown. A split tooth, or a crack that runs down the root, usually cannot be saved.
Treating early improves the odds, because a crack tends to deepen with chewing.
Questions patients ask
Why does a crack not show on an X-ray?
Cracks run in thin planes that X-rays often miss. Magnification, dye and bite tests find more.
Can a cracked tooth heal by itself?
No. A tooth cannot knit a crack the way bone does, so protecting it early matters.
Will I need a crown?
Frequently. A crown holds the tooth together and protects it from further splitting.
Is a crack an emergency?
If there is swelling, severe pain or a piece has broken off, call us. Otherwise book soon rather than waiting.
Could it be something else?
Yes. Gum disease, sinus problems and clenching can feel similar. Part of our job is finding the real source.
You may also want to read
Dental crowns
Strong, natural-looking caps for weakened or root-treated teeth.
Read moreRoot canal treatment
Deep decay, a toothache that lingers, or a nerve that is infected.
Read moreDental trauma
A knock, a fall, a chipped, loosened or knocked-out tooth.
Read moreExtractions
When a tooth cannot be saved, and how to be sure before it comes out.
Read more


