Cracked Tooth: Symptoms, First Aid & Treatment Options

Clinically reviewed by Prof. Shakeel Shahdad, Consultant & Honorary Clinical Professor, The Royal London Dental Hospital, Barts Health NHS Trust | Last updated: July 2026

Key Takeaways

• A cracked tooth won’t heal on its own and can worsen with every bite ,early treatment gives you more options and a better outcome.
• Common symptoms include pain on release (not just on biting), sensitivity to hot, cold or sweet, and a swollen gum near the affected tooth though some cracks show no symptoms at all.
• Treatment ranges from simple dental bonding for minor cracks to root canal treatment or extraction for cracks reaching the root.
• If you have severe pain, swelling, or a visible split in the tooth, seek urgent dental care rather than waiting.

What Is a Cracked Tooth?

A cracked tooth is a fracture in the tooth structure that can range from a barely visible surface line to a deep split reaching the root. It’s sometimes confused with a chipped tooth, but the two are different: a chip removes a small piece of the outer enamel and is usually a cosmetic issue, while a crack is a fracture that can travel through the tooth toward the nerve and root — and, left untreated, can lead to infection or tooth loss.

What Causes a Cracked Tooth?

• Trauma : a fall, a blow to the face, or a sports injury
• Biting down on something hard : ice, boiled sweets, dried fruit, popcorn kernels
• Teeth grinding (bruxism), often happening unconsciously during sleep
• Existing tooth decay, which weakens the structure and makes cracking more likely
• Large old fillings, which can weaken the remaining tooth structure over time
• Age-related wear : cracks become more common from your 50s onwards

Frequent consumption of hard or sugary foods and drinks such as sweets, ice, dried fruit, fizzy drinks, and alcohol , combined with inconsistent oral hygiene can gradually weaken enamel, making a crack more likely.

Symptoms of a Cracked Tooth

Not all cracks cause noticeable symptoms some are only picked up during a routine dental check-up. When symptoms do occur, they typically include:

• Sharp pain when biting down, especially when you release the bite , a hallmark sign of cracked tooth syndrome
• Sensitivity to hot, cold, or sweet foods and drinks
• Pain that comes and goes, rather than a constant ache
• A swollen or tender gum next to the affected tooth
• Visible fracture lines, a missing piece, or a splitting sensation

If you experience a fever, bad breath, or tender glands in your neck alongside tooth pain, this can indicate infection and needs prompt attention.

What to Do Right Now (First Aid)

If you suspect a cracked tooth, you can ease your symptoms while you arrange a dental appointment:

• Rinse your mouth gently with warm salt water
• Apply a cold compress to the outside of your cheek to reduce swelling
• Take an over-the-counter pain reliever such as ibuprofen, following the packet guidance
• Stick to a soft diet and avoid chewing on the affected side
• Do not use household superglue or adhesive on the tooth — it’s toxic, won’t repair the fracture properly, and can bond to soft tissue

A crack does not heal on its own. Waiting to “see if it settles” often means the crack has more time to spread or reach the nerve, which can turn a simple filling into a root canal or extraction.

When to See a Dentist in UK Is This an Emergency?

Most cracks should be assessed within days, not weeks. As a general guide:

• Emergency (same day): Severe pain, visible swelling, trauma with a knocked-out or badly displaced tooth, or heavy bleeding
• Urgent (within 24–48 hours): Sharp pain on biting/release, sensitivity that doesn’t settle, or a visible crack with discomfort
• Routine (within a week): A painless crack, craze line, or minor chip noticed at a check-up

If you’re unsure how urgent your situation is, contact your dentist directly for guidance, or NHS 111 outside of surgery hours.

Types of Cracked Teeth

Understanding the type of crack helps explain why treatment varies so much from patient to patient:

• Craze lines — tiny cracks limited to the outer enamel, usually painless and mostly a cosmetic concern
• Fractured cusp — a piece of the chewing surface breaks off, often around an existing filling; typically not very painful
• Cracked tooth — the crack extends from the chewing surface toward the root; can cause pain and needs prompt treatment to avoid tooth loss
• Split tooth — a long-standing crack that has fully separated the tooth into distinct segments; usually only part of the tooth can be saved
• Vertical root fracture — begins in the root and moves upward; often only discovered once the surrounding gum or bone is affected, and frequently requires extraction

How Dentists Diagnose a Cracked Tooth

Cracks are often invisible on a standard X-ray, so your dentist may use a combination of:

• Visual examination under magnification and bright light
• A bite test, where you bite down on a small device to help pinpoint pain on release
• Dental dye to highlight fine surface cracks
• X-rays to assess the tooth’s nerve and surrounding bone for signs of infection

Treatment Options for a Cracked Tooth

Your dentist will recommend treatment based on the crack’s type, location, and severity.

1. Dental Bonding

Used for minor cracks, chips, decay, or discoloration. The dentist roughens the tooth surface, applies a conditioning liquid, then shapes a tooth-coloured composite resin directly onto the tooth. A UV light is used to harden the material, which is then shaped and polished. This procedure usually doesn’t require anaesthesia, except when treating an associated cavity.

2. Crowns

A crown is a custom-made cap that covers a cracked or fractured tooth, protecting it from further damage and decay. The dentist prepares the tooth under local anaesthetic, takes an impression to match its shape, and cements the finished crown into place — restoring both strength and appearance.

3. Veneers

A thin porcelain shell bonded to the front of the tooth, used where a crack affects appearance more than structural strength. The tooth is lightly prepared, an impression taken to match shape, size, and shade, and the veneer is bonded and adjusted for a natural fit. Veneers can last up to 30 years with good care.

4. Root Canal Treatment

Needed when a crack extends into the tooth’s pulp, causing pain, swelling, or sensitivity. After an X-ray confirms the extent of damage, the dentist removes the infected pulp and nerve under local anaesthetic, seals the tooth, and typically fits a crown afterward for added strength. Root canal treatment can save a tooth that would otherwise need extraction.

5. Dental Implant

Used when a crack extends below the gum line and the tooth can’t be saved. The damaged tooth is removed, and a biocompatible titanium implant is placed in the jawbone to act as a new root. After 12–16 weeks of healing, the dentist fits a custom abutment and crown to complete the restoration.

What Happens If You Leave a Cracked Tooth Untreated?

A cracked tooth won’t heal — and every bite puts pressure on the fracture, allowing bacteria to work deeper into the tooth over time. Left unaddressed, this can lead to:

• Tooth abscess or infection, which can spread to the gums, jaw, and beyond if untreated
• Nerve damage, which sometimes causes pain to fade — a sign the crack is worsening, not healing
• Tooth loss, if the crack reaches the root and the tooth can no longer be saved

Acting early keeps more treatment options — like bonding or a crown — on the table, rather than needing root canal treatment or extraction later.

How to Prevent a Cracked Tooth

• Avoid biting down on ice, hard sweets, or using your teeth to open packaging
• Wear a mouthguard if you grind your teeth at night or play contact sports
• Treat tooth decay promptly, as decayed teeth are more prone to cracking
• Attend regular dental check-ups so early cracks or weak spots are caught before they worsen

FAQs

Can a cracked tooth heal on its own? No. A crack in tooth enamel or dentine does not repair itself, and delaying treatment usually allows the crack to worsen.

Is a cracked tooth a dental emergency? It depends on severity. Sudden trauma, severe pain, or swelling needs same-day attention; milder cases should still be seen within a few days rather than left indefinitely.

Does a cracked tooth always hurt? No — some cracks, such as craze lines, cause no pain at all and are only found during a check-up. A lack of pain doesn’t necessarily mean a crack is minor.

What’s the difference between a chipped and a cracked tooth? A chip removes a small piece of enamel and is largely cosmetic. A crack is a fracture that can extend deeper into the tooth and, if untreated, toward the root.

Can I fix a cracked tooth myself at home? No — and you should never use household glue on a tooth. You can manage discomfort with a cold compress, salt water rinse, and over-the-counter pain relief until you’re seen by a dentist.

Contact Specialist Dental Services for a professional cracked tooth diagnosis and treatment plan.