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Cracked molar model beside bite paper and dental mirror for diagnosis
Emergency Dental Care
Last Updated: 8/2/2026

What Should You Do For A Cracked Tooth?.

A cracked tooth can deepen with chewing. Learn likely causes, short-term protection steps, symptoms to report, and how dentists decide treatment.

If you think a tooth is cracked, stop chewing on that side, rinse gently, save any broken pieces, and call a dentist. Cracks are deceptive because symptoms can come and go. A tooth may hurt only when you release a bite, only with cold, or only on one tiny cusp. MouthHealthy includes cracked and broken teeth in dental emergency guidance, especially when pain, trauma, swelling, or a sharp edge is involved.

Why Teeth Crack

Common causes include biting hard foods, old large fillings, grinding, trauma, untreated decay, and temperature stress on weakened enamel. Some cracks are shallow craze lines. Others run through dentin, into the nerve, or down the root. The depth and direction decide treatment more than the size you can see in a mirror. A tiny-looking line can be serious if biting flexes the tooth or bacteria reach the pulp.

Patient avoiding chewing on a cracked tooth while eating soft food Less force can preserve more tooth structure.

Reduce flex until the exam

Cracked teeth often worsen because the two sides flex under chewing. Until you are seen, avoid nuts, ice, hard bread, sticky candy, and testing the tooth with your finger or tongue. Orthodontic wax can cover a sharp edge briefly. Do not use household glue, nail tools, or a file. A dentist needs the crack pattern intact enough to read it.

What Helps By Situation

What You NoticeHelpful Next Step
Sharp edge cutting tongueCover with dental wax and schedule promptly.
Pain on bite releaseAvoid chewing there; ask for crack and bite testing.
Cold pain that lingersCall sooner; the nerve may be irritated.
Swelling or bad tasteTreat as urgent because infection may be involved.

Treatment can range from smoothing or bonding to an onlay, crown, root canal, or extraction. A crown can hold a cracked tooth together when the crack has not split the root. Root canal treatment may be needed when the pulp is inflamed or infected. If the tooth is split vertically below the gumline, saving it may not be predictable.

Do not be surprised if the dentist recommends a temporary plan first. A sedative filling, bite adjustment, or temporary crown can reduce symptoms while the tooth declares itself. Cracks are sometimes diagnosed by patterns over time, not a single dramatic X-ray. Photograph any visible line or chipped edge before swelling or food debris obscures it. Ask what finding would move the plan from monitoring to crown, root canal, or removal. That answer gives you a clear reason to call if pain changes.

How This Differs From A Broken Tooth

A broken tooth has missing structure you can often see. A cracked tooth may look intact while pain points to a hidden fracture. If a piece is gone, read What Should You Do For A Broken Tooth?. If a crown came off and the tooth underneath feels weak, see What Should You Do If A Crown Falls Off?. If swelling appears, What Are Signs Of A Dental Abscess? explains why waiting can be risky. Use find a dentist when you need an office that can evaluate bite pain soon.

Dentist using bite paper and magnification to evaluate a cracked tooth

Diagnosis may take more than one clue

Cracks may not show clearly on standard X-rays. Dentists often combine magnification, bite sticks, transillumination, cold testing, gum measurements, and bite marks to decide what is happening. Tell the office exactly which foods trigger pain and whether release hurts more than biting down. Those details can save time and spare the wrong tooth from treatment.

The Repair Window

A cracked tooth is not always doomed, but it is vulnerable. Protect it from chewing forces and get a diagnosis before a repairable crack becomes a split tooth or infection.

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