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Urgency triage: what needs immediate action

Trauma severity sets the timeline. The first split is simple: an avulsed permanent tooth is a true emergency, some injuries need prompt same-day care, and others are assessed on a planned basis. This triage section uses direct language because delay can change the outcome.

True emergency — act at the scene

do not wait

An avulsed (knocked-out) permanent tooth is time-critical. Rapid, correct handling strongly shapes the outcome.

  • Replant a clean avulsed permanent tooth as soon as possible, ideally right where the injury happened.
  • Hold the tooth by the crown; do not touch or scrub the root surface.
  • If replantation at the scene is not possible, place the tooth in milk, HBSS, or the patient's own saliva and get to a dentist immediately.
  • Do not store the tooth dry or in water.
  • Get urgent care for any head injury, loss of consciousness, uncontrolled bleeding, or suspected jaw fracture.

First action

Replant now or store correctly, then reach emergency dental or medical care without delay.

Evidence

IADT Part 2IADT intro

Prompt same-day evaluation

see today

These injuries are not scene emergencies, but same-day assessment supports the tooth and the surrounding tissues.

  • Displaced tooth (extrusive, lateral, or intrusive luxation) or a very loose tooth.
  • Crown fracture that exposes the pink pulp, or a fractured tooth with ongoing bleeding from the tooth.
  • A tooth that is tender to touch, mobile, or in altered bite position.
  • A recovered tooth fragment that could be re-bonded.

First action

Arrange same-day dental care so displacement can be repositioned and splinted and pulp exposure can be covered.

Evidence

IADT Part 1ESE S3

Planned assessment and monitoring

book soon

Lower-severity injuries still deserve review, because pulp status can change over the weeks that follow.

  • Small enamel chip or an enamel-dentin fracture without pulp exposure.
  • A bruised (concussed) or slightly loosened tooth that is not displaced.
  • A tooth that was traumatized in the past and now shows color change or a new radiographic finding.

First action

Schedule assessment and keep the follow-up plan; pulp testing shortly after trauma can be unreliable and is repeated over time.

Evidence

IADT Part 1

Classifying the injury

The IADT groups TDIs into fractures of the tooth, luxation (displacement) injuries, and avulsion. The type points to the immediate focus; it does not by itself decide whether root canal treatment will be needed.

01Enamel infractionAn incomplete crack within the enamel with no loss of tooth structure; the pulp is usually unaffected.

What it is

An incomplete crack within the enamel with no loss of tooth structure; the pulp is usually unaffected.

Immediate focus

Often no treatment beyond review; heavy infractions may be sealed and monitored.

02Enamel fractureA chip limited to enamel with a small loss of structure and no dentin or pulp exposure.

What it is

A chip limited to enamel with a small loss of structure and no dentin or pulp exposure.

Immediate focus

Smooth or restore for comfort and esthetics; monitor pulp status at follow-up.

03Enamel-dentin fracture (uncomplicated)A fracture through enamel and dentin without pulp exposure; dentin tubules are open.

What it is

A fracture through enamel and dentin without pulp exposure; dentin tubules are open.

Immediate focus

Cover exposed dentin and restore; a recovered fragment can sometimes be bonded back.

04Complicated crown fracture (pulp exposure)A crown fracture that exposes the pulp, seen as a pink or bleeding point.

What it is

A crown fracture that exposes the pulp, seen as a pink or bleeding point.

Immediate focus

Vital-pulp therapy may preserve the pulp, especially in young teeth; timing and exposure size guide the plan.

05Crown-root fractureA fracture involving enamel, dentin, and root, which may or may not expose the pulp.

What it is

A fracture involving enamel, dentin, and root, which may or may not expose the pulp.

Immediate focus

Stabilize, assess the fracture depth and restorability, then plan restoration, surgery, or removal.

06Root fractureA fracture of the root, often with a mobile coronal segment; the apical segment may stay vital.

What it is

A fracture of the root, often with a mobile coronal segment; the apical segment may stay vital.

Immediate focus

Reposition the coronal segment and splint; many mid-root fractures heal without root canal treatment.

07ConcussionInjury to the supporting tissues without loosening or displacement; the tooth is tender to touch.

What it is

Injury to the supporting tissues without loosening or displacement; the tooth is tender to touch.

Immediate focus

Usually monitoring only, with occlusal relief if needed and repeated pulp testing.

08SubluxationThe tooth is loosened but not displaced; there may be bleeding from the gingival sulcus.

What it is

The tooth is loosened but not displaced; there may be bleeding from the gingival sulcus.

Immediate focus

Often monitoring; a flexible splint may be considered for comfort if mobility is marked.

09Extrusive luxationThe tooth is partially displaced out of its socket along the long axis.

What it is

The tooth is partially displaced out of its socket along the long axis.

Immediate focus

Reposition gently and splint flexibly, then follow pulp status closely.

10Lateral luxationThe tooth is displaced sideways, usually with a fractured socket wall and locked position.

What it is

The tooth is displaced sideways, usually with a fractured socket wall and locked position.

Immediate focus

Reposition to free the tooth from bony lock and splint; monitor pulp and periodontal healing.

11Intrusive luxationThe tooth is driven into the socket. Apex maturity strongly shapes management.

What it is

The tooth is driven into the socket. Apex maturity strongly shapes management.

Immediate focus

Management ranges from awaiting spontaneous re-eruption to repositioning; the pulp is at high risk and is watched closely.

12AvulsionThe tooth is completely out of its socket. Extra-oral time and storage strongly affect prognosis.

What it is

The tooth is completely out of its socket. Extra-oral time and storage strongly affect prognosis.

Immediate focus

Replant as soon as possible or store correctly; this is the one injury where minutes matter (see below).

Avulsion and replantation protocol

Avulsion of a permanent tooth is one of the most serious dental injuries, and prompt, correct handling strongly shapes the outcome. This is the emergency section: the steps below use direct language because time out of the socket and how the tooth is kept moist directly affect whether the periodontal ligament survives.

If you cannot replant at the scene, store the tooth in:

  • Cold milk — widely available and the practical first choice at the scene.
  • Hank's Balanced Salt Solution (HBSS), a purpose-made tooth-rescue medium, if available.
  • The patient's own saliva — spit into a clean container and place the tooth in it, rather than holding it in the mouth, to avoid swallowing it.
  • Sterile saline as a short-term option.

Keep the tooth out of:

  • Water — a poor storage medium that harms root-surface cells, though still better than letting the tooth dry out.
  • A dry tissue, pocket, or open air for any longer than unavoidable.
  1. 1

    Handle by the crown

    Pick the tooth up by the crown. Do not touch, scrub, or dry the root surface, and do not scrape off attached tissue.

  2. 2

    Clean gently if dirty

    If the root is visibly contaminated, rinse it briefly with saline or milk (a few seconds). Do not use soap, chemicals, or a brush.

  3. 3

    Replant without delay

    Reposition the tooth into its socket the right way round, using gentle finger pressure, ideally within minutes at the scene.

  4. 4

    If replantation is not possible, store correctly

    Place the tooth in HBSS, milk, or saliva straight away and take the patient and tooth to emergency dental care.

  5. 5

    Stabilize with a flexible splint

    At the clinic the tooth is repositioned if needed and held with a passive, flexible splint, commonly for about two weeks.

  6. 6

    Arrange systemic and follow-up care

    Tetanus status is checked, systemic antibiotics may be considered per IADT guidance, and a structured follow-up schedule is set.

Apex & dry time

Apex status and extra-oral dry time steer the plan. A closed-apex (mature) tooth usually needs root canal treatment started within about 7-10 days after replantation. An open-apex (immature) tooth may revascularize, so it is monitored and treated endodontically only if necrosis or infection develops. Most ligament cells are already non-viable after about 30 minutes of dry storage, and an extended dry time (roughly over 60 minutes) makes periodontal-ligament survival unlikely and shifts the goals of treatment.

Systemic care

Systemic antibiotic use, tetanus prophylaxis, and analgesia are decided case by case with the treating clinician and medical history, not as a routine self-directed step.

Evidence

IADT Part 2Souza 2018

Splinting reference

Most trauma splints are passive and flexible so the tooth keeps some physiologic movement while the tissues heal. Durations are typical starting points from IADT guidance and are adjusted to each case.

01SubluxationFlexible (passive), if used

Splint type

Flexible (passive), if used

Typical duration

About 2 weeks, only if comfort or mobility calls for it

02Extrusive luxationFlexible (passive)

Splint type

Flexible (passive)

Typical duration

Around 2 weeks

03Lateral luxationFlexible (passive)

Splint type

Flexible (passive)

Typical duration

Around 4 weeks, reflecting socket-wall involvement

04Avulsion (replanted)Flexible (passive)

Splint type

Flexible (passive)

Typical duration

Around 2 weeks in most cases

05Mid-root fractureFlexible (passive)

Splint type

Flexible (passive)

Typical duration

Around 4 weeks

06Cervical-third root fractureFlexible (passive), longer

Splint type

Flexible (passive), longer

Typical duration

Up to about 4 months when the fracture is near the neck

07Alveolar (bone) fractureFlexible (passive)

Splint type

Flexible (passive)

Typical duration

Around 4 weeks

Rigid or prolonged splinting is generally avoided because it may raise the risk of ankylosis and replacement resorption. The final splint choice and duration are set by the treating clinician.

Endodontic decision-making after trauma

Root canal treatment is not an automatic step after trauma. The decision depends on the injury type, apex maturity, and whether the pulp shows signs of necrosis or infection over time, so pulp status is monitored rather than assumed.

Situation

Uncomplicated enamel or enamel-dentin fracture

Monitoring may fit when

The tooth stays responsive to testing and symptom-free; the exposed dentin is covered and reviewed.

Endodontic treatment may fit when

Later signs of pulp necrosis, infection, or apical periodontitis develop on follow-up.

Situation

Complicated crown fracture (pulp exposure)

Monitoring may fit when

Vital-pulp therapy may keep the pulp alive, particularly in young or immature teeth.

Endodontic treatment may fit when

The pulp is non-vital, or pulp preservation is not feasible given exposure size and timing.

Situation

Luxation in a closed-apex (mature) tooth

Monitoring may fit when

Testing and imaging suggest the pulp is recovering and there is no infection.

Endodontic treatment may fit when

Necrosis or infection is evident, which is more likely after severe displacement such as intrusion.

Situation

Open-apex (immature) tooth after trauma

Monitoring may fit when

Revascularization is possible, so the tooth is watched for continued root development.

Endodontic treatment may fit when

Necrosis or infection develops; open-apex pathways such as regenerative endodontics or apexification may then be considered.

Situation

Avulsed and replanted permanent tooth

Monitoring may fit when

An immature tooth may be monitored for revascularization before any endodontic step.

Endodontic treatment may fit when

A mature closed-apex tooth generally has root canal treatment started within about 7-10 days of replantation.

Resorption as a trauma sequela

Root resorption is a recognized sequela of moderate-to-severe trauma, especially after avulsion and replantation, and it is a key reason follow-up continues for months to years. This page summarizes the trauma link; the resorption guide covers types and management in depth.

  • Replacement resorption (ankylosis), where root structure is gradually replaced by bone, is the most frequently reported pattern after replantation.
  • Inflammatory (infection-driven) external resorption can follow when pulp infection persists, and it may respond to timely endodontic treatment in a treatable tooth.
  • Surface resorption is usually self-limiting, and internal resorption is comparatively uncommon after avulsion.
  • Extended extra-oral dry time and delayed care are associated with a higher chance of unfavorable resorption.

Because early resorption can be silent, scheduled radiographic follow-up rather than symptoms alone is used to detect it.

Differences in primary (baby) teeth

Trauma to primary (baby) teeth is managed differently, mainly to protect the developing permanent successor beneath. This is a short orientation; primary-tooth trauma is handled through pediatric dental care.

  • An avulsed primary tooth is generally not replanted, because replantation can harm the permanent tooth bud.
  • Displacement injuries in primary teeth are often managed by repositioning, monitoring, or extraction rather than by the permanent-tooth protocols.
  • Color change in a traumatized primary tooth is common and does not always mean treatment is needed.

Any child with dental trauma benefits from prompt pediatric dental review, since decisions weigh both the injured tooth and the permanent successor.

Follow-up schedule and warning signs

Follow-up is part of trauma treatment, not an optional extra. Pulp status and healing are reassessed over a schedule because early problems are often symptom-free.

  • Clinical and radiographic reviews are typically arranged over weeks to months, with the exact intervals set by injury type.
  • Pulp sensibility testing is repeated over time because it can be unreliable soon after trauma.
  • Splints are reviewed and removed on schedule to help lower the risk of ankylosis.
  • CBCT is reserved for selected complex cases where it would change management, using the smallest justified field of view.

Warning signs during follow-up

  • Increasing pain, tenderness to bite, or a returning throbbing ache.
  • Swelling, a gum pimple or sinus tract, or discharge near the tooth.
  • The tooth becoming looser, darker, or higher in the bite.
  • Fever or spreading facial swelling, which calls for urgent care.

What to ask the dental team

01What type of injury is this, and is the pulp likely affected?
02Does this tooth need root canal treatment now, or can pulp status be monitored?
03How long will any splint stay in place?
04What follow-up schedule and tests are planned?
05What are the warning signs that should prompt an earlier visit?
06Is this tooth at higher risk of resorption, and how will that be checked?
07For a child, how will the permanent tooth underneath be protected?
08What are the options if the tooth cannot be saved?

Evidence and limitations

Trauma management is anchored in the IADT guidelines and supported by cohort studies, case series, and meta-analyses. Randomized evidence is limited by the nature of emergencies, so recommendations are graded and individualized.

  • Much trauma evidence comes from observational cohorts and registries rather than randomized trials.
  • Reported storage-medium and dry-time thresholds are practical guidance, and real-world outcomes vary with handling and timing.
  • Resorption and long-term survival figures are pooled averages that describe groups, not a single tooth.

Common questions

01

My tooth was knocked out — what should I do first?

Short answer

For a permanent tooth, replant it as soon as possible after holding it by the crown and rinsing briefly if dirty.

  • 01If you cannot replant it, store it in milk, HBSS, or saliva and reach emergency dental care right away.
02

How long can a tooth be out of the mouth before replanting?

Short answer

Sooner is better, and minutes matter for the ligament cells: most are already non-viable after about 30 minutes of dry storage, and after roughly 60 minutes the ligament is unlikely to survive.

  • 01Replantation may still be worthwhile, so professional advice is still valuable.
03

Should a knocked-out baby tooth be put back?

Short answer

Generally no.

  • 01An avulsed primary tooth is usually not replanted because it can damage the permanent tooth developing underneath.
  • 02A child with dental trauma should still be seen promptly.
04

Does every fractured or injured tooth need a root canal?

Short answer

No.

  • 01Many enamel and enamel-dentin fractures and milder luxation injuries keep a healthy pulp.
  • 02Root canal treatment is considered when signs of pulp necrosis or infection appear over follow-up.
05

Why does a traumatized tooth need long follow-up?

Short answer

Pulp problems and root resorption after trauma are often silent early on.

  • 01Scheduled tests and radiographs detect changes before symptoms appear.
06

Which liquid is recommended for storing a knocked-out tooth?

Short answer

Cold milk is a widely available first choice, and HBSS tooth-rescue solution is an excellent purpose-made medium; saliva (spit into a container) can also be used.

  • 01Water is a poor medium and harms root-surface cells, though even water is better than letting the tooth dry out.
07

Will a knocked-out tooth that is put back stay forever?

Short answer

Replantation can save many teeth, but some develop resorption over time, especially with longer dry time.

  • 01Follow-up monitors healing and plans ahead if the tooth is later lost.

References

  1. Levin L et al. IADT guidelines for the management of traumatic dental injuries: general introduction - Dent Traumatol (2020);36(4):309-313. DOI 10.1111/edt.12574; PMID 32472740
  2. Bourguignon C et al. IADT guidelines for the management of traumatic dental injuries: 1. Fractures and luxations - Dent Traumatol (2020);36(4):314-330. DOI 10.1111/edt.12578; PMID 32475015
  3. Fouad AF et al. IADT guidelines for the management of traumatic dental injuries: 2. Avulsion of permanent teeth - Dent Traumatol (2020);36(4):331-342. DOI 10.1111/edt.12573; PMID 32460393
  4. Day PF et al. IADT guidelines for the management of traumatic dental injuries: 3. Injuries in the primary dentition - Dent Traumatol (2020);36(4):343-359. DOI 10.1111/edt.12576; PMID 32458553
  5. Souza BDM et al. Incidence of root resorption after the replantation of avulsed teeth: a meta-analysis - J Endod (2018);44(8):1216-1227. DOI 10.1016/j.joen.2018.03.002; PMID 29866405
  6. Duncan HF et al. Treatment of pulpal and apical disease: the ESE S3-level clinical practice guideline - Int Endod J (2023);56 Suppl 3:238-295. DOI 10.1111/iej.13974; PMID 37772327
  7. Sousa Melo SL et al. AAE/AAOMR Joint Position Statement: Use of CBCT in Endodontics 2025 Update - OOOO (2026);141(1):126-135. DOI 10.1016/j.oooo.2025.09.013; PMID 41407481

Safety Notice

This guide is educational decision-support and cannot replace an in-person examination. It follows published IADT guidance, but individual cases vary. Seek urgent dental, oral-surgery, or emergency care after avulsion or severe trauma, or when there is a head injury, uncontrolled bleeding, spreading swelling, or a suspected jaw fracture.

Dr. Levent Yuksel

Reviewed by

Dr. Levent Yuksel

DDS · Endodontist

Independently authored and clinically reviewed.

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