What to Do When a Tooth Breaks

A tooth fracture is loss of integrity in part of the enamel, dentine or deeper tissues due to a crack or trauma. Even a small-looking fracture may have depth that cannot be judged externally; the pulp, root or surrounding supporting tissues may be affected.

Summary: A tooth fracture is an injury in which part of the tooth separates or loses integrity. A broken, cracked or displaced tooth should be assessed the same day. Keep any recovered fragment from drying and avoid stressing the damaged tooth. For rapidly increasing swelling of the face, beneath the jaw or neck, difficulty breathing or bleeding that persists despite pressure, call 112 immediately or attend the nearest emergency department. Pain relief does not mean recovery; infection may progress silently when pulp loses vitality. The approach is tailored through clinical examination and, when needed, radiological imaging.

What Is a Tooth Fracture and What Causes It?

A tooth may fracture after a fall, impact, biting a hard object, advanced decay, tissue loss around a large filling or repeated clenching forces. Visible size alone does not show the depth of damage. Cracks and fractures cannot be distinguished at home by appearance or pain; the dentist assesses them.

From outside inward, the crown contains enamel, dentine and pulp. Limited enamel loss differs from injury reaching deeper tissues. Pulp is the tooth’s vascular and nerve tissue; its involvement is investigated through symptoms and clinical examination together.

Factors that may predispose to fracture include:

• A fall, collision or blow to the face
• Biting hard foods or objects
• Decay weakening tooth tissue
• Fracture of remaining tissue around large fillings
• Repeated loading from clenching or grinding
• Progression of a previously unnoticed crack

With a fracture, a piece of tooth may separate. With a crack, the outer surface may look largely intact. However, pain, sensitivity, colour or a visible line cannot establish conclusions such as a superficial fracture or deep crack.

Possible outcomes of traumatic dental injuries vary by injury type (PMID 24824054 — Traumatic dental injuries: etiology, prevalence and possible outcomes, 2014). Even small-looking tissue loss therefore requires clinical assessment of its extent.

What Should You Do First When a Tooth Breaks?

The aim is to protect oral tissues and the tooth from further trauma until assessment, not to repair it at home. Gently rinse with water. Apply direct pressure to bleeding with clean gauze. If a fragment is found, keep it in a clean container without allowing it to dry; seek dental assessment the same day.

Initially, observe the following:

• Do not put chewing pressure on the broken tooth.
• Do not probe the sharp edge with the tongue, cheek or lip.
• Do not rub, scrape or disinfect the fragment.
• Do not let the fragment dry.
• Do not apply household glue to the tooth.
• Do not file or reshape the broken surface with tools.
• Do not place aspirin, alcohol or other substances directly on the tooth.

Finding a fragment does not guarantee that it can be reused. The 1996 case report Fractured-tooth fragment reattachment discusses an approach to reattaching a fragment (PMID 9171043). Whether this is possible in your case can only be determined at examination.

Not finding the fragment is no reason to delay assessment. Examination also checks for other injuries inside the mouth or in soft tissues such as lips and cheeks.

When to Contact Your Doctor

The level of care depends on risks from the injury and accompanying symptoms. One or more findings below is sufficient; do not wait for all of them. Airway-related symptoms, spreading swelling, persistent bleeding or serious facial and jaw trauma require emergency help. Dental injuries need assessment the same day.

Call 112 or go to the nearest emergency department immediately

Do not wait if any of the following is present:

• Rapidly increasing facial swelling
• Rapidly increasing swelling under the jaw
• Rapidly increasing neck swelling
• Difficulty breathing
• Difficulty swallowing
• Voice changes
• Inability to open the mouth
• Swelling spreading around the eye
• Swelling progressing towards the neck
• Fever
• Chills
• Deterioration in general condition
• Bleeding that continues despite pressure
• A change in the bite after trauma
• Inability to move the jaw after trauma
• Suspected jaw fracture
• Loss of consciousness after trauma
• Vomiting after trauma
• Dizziness after trauma

Assessment on the same day or without delay

Any of the following requires assessment the same day:

• A permanent tooth completely knocked out by trauma
• A broken tooth
• A cracked tooth
• A displaced tooth
• Toothache that interrupts sleep
• Progressively worsening toothache
• A bump on the gum
• Discharge from the gum
• A persistent unpleasant taste in the mouth
• Persistent bad breath
• Swelling of the mouth or face
• A filling, crown or bridge falling out
• An orthodontic wire poking into tissue
• An orthodontic wire injuring oral tissues
• A non-healing mouth sore lasting longer than two weeks
• A white or red patch in the mouth lasting more than two weeks
• An area of firmness in the mouth lasting longer than two weeks
• Gum bleeding outside brushing
• Loose teeth
• Widening gaps between teeth
• Jaw joint locking

If a permanent tooth is completely knocked out, time is critical; do not wait until morning. Do not dry it; hold it by the crown, the upper part, and do not rub the root. Keep it from drying during transport. If unsure whether it is a baby or permanent tooth, do not waste time trying to decide at home; seek assessment the same day. Do not try to replace a knocked-out baby tooth at home.

Do Symptoms Show the Depth of a Fracture?

Pain, sensitivity, mobility or colour change provide useful information but do not alone show fracture depth. The same symptom can arise through different mechanisms, and no symptoms does not prove superficial damage. The dentist determines tissue involvement through examination, tests and imaging when needed.

Do not diagnose yourself from the fracture colour, duration of sensitivity or pain on biting. The need to interpret findings together in cracked teeth is discussed in Review of Cracked Tooth Syndrome: Etiology, Diagnosis, Management, and Prevention (PMID 34956432).

How Is a Broken Tooth Examined?

Examination considers visible tissue loss, mobility, bite, pulp responses and surrounding tissues together, with imaging when needed. One test or image may not show every fracture; results are interpreted alongside history and complementary clinical findings.

Assessment may include:

• Inspection of visible fracture boundaries
• Checking gums, lips or cheeks for injury
• Assessing tooth mobility
• Examining the bite and chewing contacts
• Vitality tests assessing pulp responses
• Imaging of the root and surrounding bone
• Light-assisted or magnified examination for suspected cracks

Initial findings after trauma may not fully explain the tooth’s later condition. The dentist may therefore plan follow-up based on the initial examination and injury type. Whether monitoring is needed and what to track depend on individual clinical circumstances.

What Options Are Considered for a Broken Tooth?

Options should help you understand decisions discussed at examination, not select a procedure from symptoms. Remaining tissue, pulp and root condition, supporting tissues and bite forces affect decisions. No option can be chosen from a photo, visible size or pain alone.

Restoration, root canal treatment or post-extraction options can be considered only after these assessments. Clinical conditions affecting root canal decisions after permanent tooth trauma are reviewed in Indications for root canal treatment following traumatic dental injuries to permanent teeth (2023; PMID 37908151). See the root canal treatment page for the general scope.

The relationship between remaining coronal tissue, restoration design and fracture resistance of root-treated teeth was assessed in Ferrule design and fracture resistance of endodontically treated teeth (PMID 2187080). It does not determine individual treatment alone, but explains why remaining tissue matters at examination.

Neither preservation nor extraction can be guaranteed beforehand. Suitability is determined through clinical examination and imaging when needed. Expected benefits, limitations, procedural risks and follow-up needs vary individually.

How Do Front and Back Tooth Fractures Differ?

Assessment principles are similar, but functional needs may differ. Shape, speech and appearance may feature more in anterior planning, and distribution of chewing loads in posterior planning. Still, fracture extent and tissue condition, not location alone, determine the decision.

A small visible change in a front tooth does not prove deeper tissues are unaffected. A hard-to-see fracture in a back tooth does not mean minor damage. These examples are not for self-diagnosis or choosing treatment; the dentist determines the extent.

What Happens If a Broken Tooth Is Left Untreated?

An unassessed fracture may progress under chewing loads, affect deeper tissues or allow bacterial entry. Sensitivity, chewing pain, swelling, discharge or mobility may develop. Available options can change as sound tissue changes; the course cannot be reliably predicted externally.

Possible consequences of delay include:

• Progression of the fracture or crack
• Sensitivity in exposed dentine
• Pulp inflammation
• Loss of pulp vitality
• Infection around the root
• Reduction in remaining tooth tissue
• Irritation of oral tissues by a sharp edge
• Development of tooth mobility
• Changes in the bite

Toothache can mislead. When pulp becomes necrotic, losing vitality, pain may lessen or stop while infection progresses silently around the root. Assuming examination is unnecessary because pain has gone is therefore not a safe basis for decisions.

How Can the Area Be Protected Until Assessment?

Protection until assessment aims to limit new forces on the tooth and injury from sharp surfaces, not to repair the fracture at home. After first aid, continue normal cleaning gently, avoid chewing on the tooth and do not let temporary measures delay examination.

During daily care, consider the following:

• Do not stop oral cleaning entirely.
• Clean around the fracture without excessive pressure.
• Do not use the tooth for chewing or holding objects.
• Avoid actions that load the broken tooth when biting.
• Report any new mobility, swelling, discharge or bite changes during assessment.
• Note the time of injury and changes in symptoms.

These measures only protect the area until assessment; they do not treat the fracture. The earlier warnings against foreign substances, glue or tools remain applicable. If any emergency sign appears, call 112 immediately or go to the nearest emergency department.

Questions You Can Ask Your Clinician

Ask which tissues are involved, how well the tooth is supported, the pulp condition and the limits of options to understand decisions. Discuss risks, alternatives and follow-up as well as expected benefit. Planning is individual and based on findings; results cannot be guaranteed beforehand.

Questions to ask include:

• Which tissues does the fracture extend into?
• Is there injury to the root or surrounding bone?
• How was pulp condition assessed?
• Do the initial findings need monitoring?
• Which tooth-preserving options can be discussed?
• What are the expected benefits and limitations of each option?
• What are the possible risks of interventions?
• What changes may develop if treatment is delayed?
• Could the bite or clenching have contributed to the fracture?
• Can the broken fragment be used in assessment?
• Which symptoms after treatment require reassessment?

Frequently asked questions

Common questions concern whether a tooth can be preserved, whether painless fractures need assessment and how to handle a recovered fragment. A photo alone cannot provide definite answers. Clinical examination, symptom history and imaging when needed form the basis for individual decisions.

What is done for a half-broken tooth?

A tooth broken in half needs assessment the same day. The visible proportion lost does not alone show involved tissues or whether the tooth can be preserved. Remaining sound tissue, pulp, root and support are examined before benefits, limitations and risks of options are discussed individually.

What happens if a broken tooth is not repaired?

Without assessment, tissue loss may progress, the pulp may be affected or infection may develop around the root. Initial absence of pain is not a safe reason to wait. Symptoms alone cannot predict the condition or effects of delay, so a broken tooth needs same-day assessment.

My tooth broke. What should I do?

Avoid stressing the tooth and keep any fragment in a clean container without letting it dry. Apply direct pressure with clean gauze if bleeding occurs. Do not apply glue or other substances. Broken, cracked or displaced teeth need same-day assessment; do not wait if any sign requiring 112 is present.

What helps a broken tooth at home?

Home methods cannot repair a broken tooth. Avoiding interference and chewing pressure and continuing gentle cleaning only limit further damage. Do not apply aspirin, alcohol, glue or irritants. These measures do not replace clinical assessment or treatment.

How should a broken tooth fragment be stored?

Keep a found fragment in a clean container without rubbing, scraping or drying it. Suitability for reattachment cannot be determined at home. The dentist assesses fragment integrity and tooth condition. A missing fragment, no pain or a small-looking fracture is no reason to delay assessment.

Does a tooth fracture hurt?

A fracture can cause pain or hot-and-cold sensitivity, while some are initially symptom-free. Symptoms or their absence do not alone show depth. Pain can change, but this cannot establish vitality at home. A broken tooth should be assessed the same day regardless of pain.

Does a tooth broken by decay need extraction?

Not every tooth broken by decay is extracted. Decisions depend on remaining sound tissue, fracture extent at root level, pulp condition and tissue support. Appearance cannot establish preservation or the appropriate approach. Clinical examination and imaging when needed determine suitability.

References

Sources cover traumatic dental injuries, a fragment reattachment case report, cracked tooth assessment and post-trauma root canal decisions. General information cannot be used for individual diagnosis or treatment selection; decisions follow clinical examination and imaging when needed.

• PMID 24824054 — Traumatic dental injuries: etiology, prevalence and possible outcomes (2014).
• PMID 9171043 — Fractured-tooth fragment reattachment (1996).
• PMID 34956432 — Review of Cracked Tooth Syndrome: Etiology, Diagnosis, Management, and Prevention (2021).
• PMID 37908151 — Indications for root canal treatment following traumatic dental injuries to permanent teeth.
• PMID 2187080 — Ferrule design and fracture resistance of endodontically treated teeth.

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This information is for educational purposes and does not replace diagnosis and treatment. Please consult your doctor about your symptoms.