A tooth that hurts after biting on something hard almost always has a new crack, whether it is a hairline crack in the enamel or a deeper crack that reaches into the tooth. The next step is not to guess. It is to get in to be seen so the crack can be identified and treated before it spreads. Cracks that are caught early often need only a crown. Cracks left alone often become a root canal, a lost tooth, or an infection.
Dr. Zack Finnegan, DMD at Magnolia Smiles in Woodstock, GA sees this pattern often. This guide covers what usually happens, what to do at home, and what the visit typically involves.
What likely happened
Biting hard on something (an olive pit, a piece of hard candy, a popcorn kernel, an ice cube, an unexpected bone in food) can:
- Fracture a cusp of the tooth.
- Cause a hairline crack from the biting surface toward the root.
- Crack an existing filling or crown.
- Fracture the tooth around a large old filling.
- Bruise the ligament around the tooth (least concerning).
The pain pattern often looks like this:
- Sharp pain when biting down or releasing a bite.
- Pain concentrated on one specific spot on the tooth.
- Sensitivity to cold that lingers.
- Feels fine most of the time, then flares on a specific bite.
What to do right now
- Stop chewing on that side.
- Take an over-the-counter pain reliever as directed. Ibuprofen works well for tooth pain.
- Rinse with warm salt water if the area feels irritated.
- If a piece broke off, save it in a container. Bring it to the visit.
- Avoid very hot or very cold food and drink on that side.
- Do not press on the tooth with your tongue to test it. Repeated bite testing can spread the crack.
- Call the office to be seen as soon as possible.
What is urgent vs. what can wait a couple of days
Urgent (call same day)
- A large piece of the tooth broke off.
- Sharp edges cutting the tongue or cheek.
- Significant pain that keeps you up at night.
- Swelling in the face or gum.
- Fever.
- Bleeding.
Book within 24 to 72 hours
- Sharp pain on biting that has come and gone since the incident.
- Sensitivity to cold that lingers a few seconds.
- Mild soreness that is not getting worse.
Even if the pain is mild, do not skip the visit. Cracks that are not treated tend to grow.
Types of cracks and what each usually needs
Crazing (fine surface lines)
Very shallow cracks in the enamel that do not cause pain. Usually no treatment needed. Monitored at future visits.
Fractured cusp (a cusp broke off)
A common outcome. Usually treated with a crown to protect the remaining tooth.
Cracked tooth (a crack running from the biting surface toward the root)
The most common serious crack. If caught before it reaches the nerve, a crown often saves the tooth. If it has reached the nerve, a root canal plus crown is usually needed.
Split tooth (a crack has completely divided the tooth)
The tooth cannot usually be saved as a whole. In some cases half the tooth can be kept. Often extraction and replacement (implant or bridge) is the plan.
Vertical root fracture (a crack that started in the root)
Often unsaveable. Extraction is usually the outcome.
Learn more about dental crowns at Magnolia Smiles and restorative dentistry in Woodstock, GA.
What the visit typically looks like
- Focused exam. Bite test (asking you to bite on a small stick over each cusp), cold test, and percussion (tapping) to isolate which tooth and which part.
- Digital X-ray and photos. X-rays sometimes show cracks; often they do not. The clinical exam is the primary diagnostic.
- Diagnosis of the type of crack and how far it extends.
- Written plan for treatment based on the specific crack.
- Sometimes immediate treatment, sometimes a plan scheduled for the next visit.
How Magnolia Smiles handles cracked teeth
- Careful bite testing to isolate the affected tooth.
- Discussion of options based on how far the crack extends.
- Written cost estimate before scheduling treatment.
- Same-day crown options in some cases.
- Referral to an endodontist for complex root canal cases when needed.
Learn more about emergency dentistry at Magnolia Smiles.
Frequently asked questions
Will the tooth heal on its own?
Enamel does not heal. If a crack is present, it will not disappear. Sometimes symptoms fade for a while and return.
How long can I wait before seeing the dentist?
If pain is manageable and there is no swelling, a few days is usually fine. Longer than a week increases the risk that the crack spreads.
Can a crack always be seen on an X-ray?
Not always. Vertical cracks in particular often do not show on X-ray. The clinical exam is primary.
What if it stops hurting?
Symptoms fluctuating does not mean the crack healed. Get it checked.
Do I always need a crown for a cracked tooth?
Most cracked teeth benefit from a crown to hold the tooth together. Sometimes a very small crack can be monitored, but the safe default is treatment.
Is a cracked tooth covered by insurance?
Treatment of a cracked tooth (crown, root canal) is typically covered. The office verifies your benefits.
Ready to have it looked at?
The sooner a cracked tooth is diagnosed, the more options you have. Contact Magnolia Smiles to book.
Reviewed by Dr. Zack Finnegan, DMD. Magnolia Smiles, Woodstock, GA. This article is for general education and does not replace an in-person exam.