Cracked Tooth — Pain When You Release a Bite
Cracks are often invisible on a normal x-ray. Pain on release of biting pressure is the classic sign.
What is happening?
A cracked tooth is a split in the enamel or dentin that may not show in the mirror. Chewing hard food, grinding, large fillings, sudden hot-cold swings, age-related wear, and trauma are typical starts. This is one of the cases where a small 3D scan is sometimes justified.
Same-day care
Common symptoms
- Sharp pain when you release a bite
- Pain that comes and goes and is hard to point to
- Cold sensitivity
- Often nothing visible in the mirror
Is it urgent?
Pain on release of biting — book promptly, before the crack spreads. Pain localized to one tooth and getting worse. Swelling — that is no longer a 'wait and see' crack.
While a suspected crack is waiting
Stop chewing there
Use the other side. Temperature extremes make a crack announce itself and can extend it.
Write down the trigger
Note which movement hurts — biting, releasing, cold. That detail is genuinely useful at the exam.
Do not test it
Repeatedly biting to 'see if it still hurts' is how a crack grows. Book the visit.
Common causes
Chewing hard foods · Grinding · Large fillings that left thin walls · Sudden temperature extremes · Age-related wear · Trauma
How we diagnose it
We reproduce the pain with a bite test, look under magnification, and take an x-ray. Cracks often do not appear on 2D films. If the clinical tests still do not locate it, a focused 3D scan may be justified — not as a routine picture.
How we treat it
Hold the crack together
A crown or onlay can brace a crack that has not split the root. The aim is to stop flexure, not to promise the crack will vanish.
If the nerve is inflamed
Some cracked teeth need a root canal as well as a crown. Some cannot be saved. We say which, after the tests.
Sedation for this kind of treatment
Placing a crown on a cracked tooth is done with local anesthetic. If a long appointment is the reason you have been avoiding it, nitrous can be discussed for the visit, and deeper sedation can be booked ahead.
Sedation optionsCase examples
See before-and-after cases for this type of treatment. Individual results vary.
See example results →Related pages
Good to know
Frequently asked questions
Still have a question? Our team is happy to help over the phone.
(416) 483-0000Why does it hurt when I let go of a bite?
That release pain is the classic sign of a crack. The pieces flex apart as the bite opens. Stop testing it and book — cracks only grow.
Why didn't my last x-ray show it?
Many cracks are invisible on a flat x-ray. The exam uses a bite test and magnification. A 3D scan is reserved for the cases a 2D image cannot answer.
Can a cracked tooth always be saved?
No. A crack into the root may mean removing the tooth. We tell you which situation you are in before treatment starts.
Read this as education
These are common patterns, not a diagnosis of your tooth. Your dentist determines the cause during an examination.