A cracked tooth is one of those problems that can range from “watch it and see” to “needs treating today.” The trouble is, the symptoms don’t always match the severity, and a hairline crack can sometimes cause more pain than a visible fracture. If you suspect you’ve cracked a tooth, especially if you’re in pain or sensitive to pressure, we’d recommend booking an emergency dental appointment for a proper assessment. In our experience, cracks tend to get worse, not better, and the earlier they’re caught the more options you have.
Types of cracked teeth
“Cracked tooth” is an umbrella term covering several different problems, and the treatment varies considerably between them. Dentists typically classify cracks into five categories:
- Craze lines — superficial cracks in the enamel only, usually harmless
- Fractured cusp — a piece of the tooth has broken off, often around an old filling
- Cracked tooth (proper) — a crack extending from the chewing surface toward the root
- Split tooth — the tooth has separated into distinct pieces
- Vertical root fracture — a crack starting at the root, often hidden
The first one rarely needs treatment. The last one almost always means the tooth can’t be saved. Everything in between depends on how deep the crack goes and whether it’s reached the pulp.
How to tell if you’ve cracked a tooth
The classic symptom of a cracked tooth is sharp pain when you bite down, particularly when you release the bite, and inconsistent sensitivity to temperature. The pain often comes and goes, which is part of why patients delay seeking treatment, the tooth seems “fine” between episodes.
Symptoms we ask about clinically:
- Sharp pain on biting, especially on releasing
- Pain triggered by certain foods (often hard or fibrous textures)
- Sensitivity to cold or sweet, sometimes hot
- Pain that’s hard to localise to a specific tooth
- A vague feeling that “something isn’t right” in a particular area
The localisation issue is genuinely tricky. Patients often can’t tell us which tooth hurts, only which side. Cracks can refer pain to neighbouring teeth or even the opposite jaw. We use a “tooth slooth” device (basically a small plastic biting stick) to identify which cusp is cracked.
You won’t usually see a crack in a mirror, hairline cracks are invisible to the naked eye and often don’t show up on X-rays either. That’s part of what makes diagnosis tricky.
Common causes
Most cracked teeth fall into a handful of causes:
- Biting unexpectedly on something hard (popcorn kernel, olive stone, fork)
- Grinding or clenching teeth, especially at night
- Large old fillings weakening the surrounding tooth structure
- Sudden temperature changes (less common but real)
- Trauma from a fall or sports injury
We had a patient last autumn who came in convinced he had an abscess. Turned out he’d been chewing ice (a habit he’d had for years) and had hairline-cracked an upper molar. The crack hadn’t reached the pulp yet, so we were able to crown the tooth and save it. If he’d waited another month, it would have been a different conversation.
Ice chewing is up there with the worst habits we see for tooth health. Worse than most “bad foods.”
When it becomes an emergency
Not every cracked tooth is an immediate emergency, but several scenarios warrant urgent care.
Treat it as urgent and call the same day if:
- A large piece of the tooth has broken off
- You can see the nerve (red or pink dot in the middle)
- The tooth is loose, mobile, or sticking up higher than its neighbours
- You’ve had trauma to the face and the tooth is involved
- Severe pain that won’t respond to painkillers
- Bleeding from the gum or tooth that won’t stop
For minor cracks with mild intermittent symptoms, you’ve usually got a few days to schedule an appointment. But it’s not something to put off for weeks.
What to do until you can be seen
If you’ve cracked a tooth and you’re waiting for an appointment, a few sensible steps:
- Avoid chewing on that side completely
- Stick to soft foods, lukewarm where possible
- Rinse with warm salt water after meals
- Take ibuprofen and paracetamol if needed (see our toothache guide)
- If a piece has broken off, save it in milk or saline if possible
- Don’t try to glue anything back yourself
If you’ve fully knocked out an adult tooth, that’s a different scenario, time-critical, and you should call us within the hour. The tooth needs to be replanted ideally within 30 minutes for the best chance of saving it.
Treatment options for a cracked tooth
Treatment depends on where the crack is and how deep it goes. The general principle is that cracks in the crown of the tooth (above the gum line) are usually treatable, while cracks extending into the root are usually not.
| Type of crack | Typical treatment | NHS Band (England) |
|---|---|---|
| Craze lines (enamel only) | None, monitor | Band 1 — £27.90 |
| Fractured cusp | Filling or onlay | Band 2 — £76.60 |
| Cracked tooth (no pulp involvement) | Crown | Band 3 — £332.10 |
| Cracked tooth (pulp involved) | Root canal then crown | Band 3 — £332.10 |
| Split tooth | Extraction (sometimes hemisection) | Band 2 — £76.60 |
| Vertical root fracture | Extraction | Band 2 — £76.60 |
Private fees for crowns range from £450 to £900 depending on material (porcelain-fused-to-metal, all-ceramic, gold). Root canal fees vary by tooth (front teeth are simpler than molars). The NHS has a useful overview of cracked tooth diagnosis and treatment if you want to read further.
Crowns and why they’re usually needed
For most cracked teeth that haven’t lost the pulp, the standard treatment is a crown. The crown encases the tooth and holds it together, preventing the crack from propagating further. Without a crown, even a small crack tends to extend over months until the tooth splits or the pulp dies.
Patients sometimes resist the idea of a crown because of the cost or because the tooth “doesn’t feel that bad.” We understand that. But a cracked tooth that splits below the gum line is unrestorable, and the cost of an extraction plus implant or bridge is significantly higher than a crown.
A reasonable analogy: a crown on a cracked tooth is like wrapping a cracked plant pot with a metal band. The pot still works, the crack stops getting worse. Without the band, the crack travels until the pot falls apart.
Prevention, where possible
Some cracked teeth are unavoidable, biting on a hidden olive stone, accidents, sports injuries. Others are largely preventable.
The biggest preventable cause we see is bruxism, grinding or clenching teeth, usually at night. Patients often don’t know they’re doing it. Signs include waking with jaw pain, headaches, flattened or chipped teeth, or a partner mentioning the noise. A custom-made night guard worn during sleep is one of the more effective interventions in dentistry.
Other preventable factors:
- Don’t chew ice, hard sweets, popcorn kernels, or pen lids
- Address large old fillings before they fail catastrophically
- Wear a mouthguard for contact sports
- Don’t use your teeth as tools (opening packets, biting fishing line, etc.)
If you suspect you’ve cracked a tooth or you’re getting odd intermittent pain when biting, please don’t wait it out for weeks. Our team at Westcliff Dental Practice can usually see you the same day or next morning for emergency assessment. Ring us on 01702 344 500 and we’ll get you booked in.
