Dental trauma is an important and potentially outcome-changing sport-related injury, particularly in contact and collision sports (rugby, hockey, boxing, martial arts, basketball, equestrian). Most injuries are minor enamel chips, but a small proportion involve avulsion, complicated crown fractures, alveolar fractures, or jaw injury that determine permanent dental and aesthetic outcome. The defining principle is that the prognosis of a permanent tooth avulsion is exquisitely time-sensitive - every minute outside an appropriate storage medium reduces the chance of successful re-implantation. UK practice draws on IADT 2020 guidelines, SDCEP, BSPD, NICE NG232 (head injury), and NICE NG41 (cervical spine). Approximately 80 percent of sport-related tooth injuries involve the four maxillary incisors.
Each tooth has a crown (enamel over dentine, with the pulp chamber containing neurovascular tissue), a neck, and a root (cementum-covered, anchored in the alveolar socket by the periodontal ligament). The PDL provides shock absorption, sensation, and the cells (cementoblasts and fibroblasts) needed for reattachment after avulsion. PDL cell viability falls rapidly once the tooth is exposed to air, which is why storage medium and extraoral dry time determine prognosis.
Permanent (secondary) dentition replaces deciduous (primary) teeth from around age 6 to 12. Avulsed PRIMARY teeth are NOT re-implanted (risk of damaging the developing permanent tooth bud); avulsed PERMANENT teeth should be re-implanted as soon as possible. If unsure, check age and seek urgent dental advice rather than re-implanting blindly.
Patterns: tooth concussion (tender, no displacement, no mobility); subluxation (mobile but not displaced); luxation (extrusive, lateral, intrusive); avulsion (out of socket); crown fractures (Ellis I enamel only, Ellis II enamel-dentine, Ellis III complicated with pulp exposure - the WHO/Andreasen descriptive terms appear alongside Ellis in exam stems); root fractures; alveolar fracture (a bone segment moves with multiple teeth - higher risk around dental implants because surrounding bone tends to fracture before the implanted tooth loosens).
NEVER re-implant an avulsed PRIMARY (baby) tooth - it risks the developing permanent tooth bud and is contraindicated. Avulsed PERMANENT teeth are re-implanted as soon as possible. The periodontal ligament (PDL) is the critical structure: its cell viability falls rapidly out of the socket, which is why storage medium and extraoral dry time determine prognosis.
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