Paeds · ent-hearing-and-oral-health
Dental trauma and avulsed teeth
Also known as Avulsed permanent tooth · Knocked-out tooth · Tooth luxation · Crown fracture · Root fracture · Traumatic dental injury · Intrusive luxation
Fellowship topic on dental trauma and avulsed teeth in children. Covers traumatic dental injury as a time-critical emergency in which the management in the first minutes at the scene decides whether an avulsed permanent tooth survives; the Andreasen classification of hard-tissue and periodontal-ligament injuries; the periodontal ligament cell-viability pathophysiology that makes extra-alveolar dry time the dominant prognostic factor; the International Association of Dental Traumatology 2020 first-aid and management protocol of finding the tooth, holding it by the crown, rinsing a dirty root for about ten seconds and replanting a permanent tooth immediately or storing it in milk, HBSS or saliva; the rule that primary teeth are never replanted; flexible splinting, root-canal-treatment timing and systemic antibiotics for the replanted tooth; luxation and fracture subtypes; complications of inflammatory and replacement root resorption; the oral-injury link with non-accidental injury; and the safety-net and dental follow-up plan.
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Red flags
- An avulsed permanent tooth is a time-critical emergency — every minute of dry extra-alveolar time reduces the chance of periodontal-ligament healing; replant immediately at the scene or store in milk, HBSS, saline or saliva and get to a dentist within minutes. Do not store the tooth in water, and do not scrub or touch the root.
- An avulsed primary (baby) tooth must never be replanted — doing so can damage the developing permanent successor; seek dental review and reassurance.
- Facial or gum laceration with a missing tooth fragment and no tooth found raises the possibility of intrusion, aspiration, swallowing or embedding of the tooth or fragment — image and review the airway, and consider child safeguarding when the history and injury are inconsistent.
- Repeated, unexplained or age-inconsistent oral and dental injury, torn frenulum in a non-mobile infant, or delayed presentation of a painful injury raises the possibility of non-accidental injury — assess the whole child and follow safeguarding procedures.
Life stages
Care settings
Clinical exam formats
Board mappings
- General Paediatrics and Oral Health: recognition of traumatic dental injury as a time-critical emergency, the first-aid for an avulsed permanent tooth, and the rule that primary teeth are never replanted.
- Injury, poisoning and toxicology: the immediate management of an avulsed tooth, analgesia, tetanus assessment, and safeguarding consideration for oral injury.
- Renewed curriculum — Oral Health and Acute Care: the periodontal-ligament cell-viability pathophysiology, the dominant prognostic role of extra-alveolar dry time, and the IADT 2020 protocol for replantation, storage media, flexible splinting and systemic antibiotics.
- Regional practice: the role of school and sporting mouthguard programmes and the disproportionate trauma burden in remote communities with limited urgent dental access.
- General Paediatrics: the scene first-aid for a knocked-out permanent tooth — find it, hold it by the crown, rinse a dirty root for about ten seconds, replant it or store it in milk, and the reasons water and scrubbing harm the root.
- Emergency care: analgesia, tetanus prophylaxis assessment, and the safety-net and urgent dental or maxillofacial referral for replanted, luxated and fractured teeth.
- Long Case / Structured discussion: a child with a knocked-out permanent incisor — the Andreasen classification, the IADT 2020 management by extra-alveolar dry time and apex status, complications of root resorption, and the prognosis.
- Communication station: explaining to a parent, coach or teacher what to do with a knocked-out tooth in the first minutes, and why milk and immediate replantation matter.
- Level 2 / 3 — Oral Health and Injury: traumatic dental injury, the first-aid for an avulsed permanent tooth, and the never-replant-a-primary-tooth rule.
- Child protection: recognition that oral injury can be a sign of non-accidental injury, and the importance of consistent history and safeguarding referral.
- Foundation of Practice (FOP): the classification and epidemiology of traumatic dental injury, and the emergency first-aid for an avulsed permanent tooth.
- Applied Knowledge in Practice (AKP): the IADT 2020 management protocol, storage media, the distinction between primary and permanent teeth, and the complications of root resorption.
- History-taking and management: the child with a dental injury, the timing and mechanism, the first-aid given, and the immediate management and analgesia plan.
- Communication: coaching a family or teacher on what to do with a knocked-out tooth, and the safety-net advice for facial swelling, infection or uncontrolled pain.
- General Pediatrics Content Outline: traumatic dental injury, the avulsed permanent tooth as an emergency, storage media and immediate replantation, and the primary-tooth rule.
- Injury, Emergency Care and Child Abuse: tetanus prophylaxis, the safeguarding consideration in oral injury, and sporting mouthguard prevention.
- Patient Care: the time-critical first-aid and management of an avulsed permanent tooth, and the stepwise care of luxation and crown-fracture injuries.
- Medical Knowledge: the periodontal-ligament pathophysiology, the dominant prognostic role of extra-alveolar dry time, and the complications of inflammatory and replacement root resorption.
- Systems-Based Practice and Population Health: sporting and playground mouthguard programmes, first-aid education for teachers and coaches, and reduction of oral-injury inequality.
- Medical Expert: traumatic dental injury diagnosis and management, the IADT 2020 protocol, and the complications of root resorption.
- Health Advocate and Collaborator: mouthguard and first-aid programmes, and urgent access to dental and maxillofacial care in remote communities.
- Communicator: explaining first-aid for a knocked-out tooth, the safety-net for infection, and the safeguarding consideration when oral injury is unexplained.
Overview & Definition
A nine-year-old boy falls off his bicycle and arrives in the emergency department holding his permanent front tooth in a glass of milk, twenty minutes after the fall. What you and his parents did in those twenty minutes will decide whether that tooth is still a living part of his mouth when he is nineteen. That is the whole topic compressed into a single vignette: dental trauma is a time-critical injury in which the correct action is taken at the scene, often by a layperson, long before a clinician is involved. [1] [6]
A traumatic dental injury is damage to the teeth, their supporting structures or the surrounding oral soft tissues caused by an external force. The damage ranges from a chip of enamel, through loosening and displacement of an intact tooth, to the complete avulsion of a tooth from its socket. The fellowship skill is to recognise which of these is the emergency, to know what should have been done at the scene, and to deliver the immediate management that salvages a tooth — or to know when a primary tooth must be left alone. [4] [10]
The injuries divide cleanly by what is torn. Hard-tissue injuries fracture the tooth — an enamel infraction, an uncomplicated or complicated crown fracture breaching or not breaching the pulp, a crown-root or root fracture. Periodontal-tissue injuries damage the attachment — a concussion, a subluxation, an extrusive, lateral or intrusive luxation, and finally the complete avulsion. Supporting-bone injuries fracture the alveolar socket wall. This division, the Andreasen classification, is the language examiners expect, and it maps directly onto management. [2] [4]
The central, life-of-the-tooth decision is the avulsed permanent tooth, and it is the one the public most often gets wrong. The cells of the periodontal ligament that remain on the root surface are the only thing that can re-form a healthy attachment; once they dry and die, the body treats the root as a foreign body and resorbs it. Everything in this topic — the first-aid, storage media, timing, rule about primary teeth — flows from that single biological fact. [1] [7]
References12ShowHide
- [1]Fouad AF; Abbott PV; Tsilingaridis G; Cohenca N; Lauridsen E; Bourguignon C; O'Connell A; Flores MT; Day PF; Hicks L; Andreasen JO; Cehreli ZC; Harlamb S; Kahler B; Oginni A; Semper M; Levin L International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 2. Avulsion of permanent teeth. Dent Traumatol, 2020.PMID 32460393
- [2]Bourguignon C; Cohenca N; Lauridsen E; Flores MT; O'Connell AC; Day PF; Tsilingaridis G; Abbott PV; Fouad AF; Hicks L; Andreasen JO; Cehreli ZC; Harlamb S; Kahler B; Oginni A; Semper M; Levin L International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 1. Fractures and luxations. Dent Traumatol, 2020.PMID 32475015
- [3]Day PF; Flores MT; O'Connell AC; Abbott PV; Tsilingaridis G; Fouad AF; Cohenca N; Lauridsen E; Bourguignon C; Hicks L; Andreasen JO; Cehreli ZC; Harlamb S; Kahler B; Oginni A; Semper M; Levin L International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 3. Injuries in the primary dentition. Dent Traumatol, 2020.PMID 32458553
- [4]Levin L; Day PF; Hicks L; O'Connell A; Fouad AF; Bourguignon C; Abbott PV International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: General introduction. Dent Traumatol, 2020.PMID 32472740
- [5]Day PF; Duggal M; Nazzal H Interventions for treating traumatised permanent front teeth: avulsed (knocked out) and replanted. Cochrane Database Syst Rev, 2019.PMID 30720860
- [6]Lam R Epidemiology and outcomes of traumatic dental injuries: a review of the literature. Aust Dent J, 2016.PMID 26923445
- [7]Pohl Y; Wahl G; Filippi A; Kirschner H Results after replantation of avulsed permanent teeth. III. Tooth loss and survival analysis. Dent Traumatol, 2005.PMID 15773889
- [8]Kahler B; Hu JY; Marriot-Smith CS; Heithersay GS Splinting of teeth following trauma: a review and a new splinting recommendation. Aust Dent J, 2016.PMID 26923448
- [9]Ballal V; V J Storage media. Br Dent J, 2011.PMID 21869779
- [10]Abbott PV; Levin L Introducing the revised IADT Guidelines for the management of traumatic dental injuries. Dent Traumatol, 2020.PMID 32959640
- [11]de Gregorio C; Tewari N Management of Complications in Dental Traumatology. Dent Traumatol, 2025.PMID 39578670
- [12]Mele F; Introna F; Santoro V Child abuse and neglect: oral and dental signs and the role of the dentist. J Forensic Odontostomatol, 2023.PMID 37634173