Primary (Deciduous) Tooth Avulsion

Primary tooth avulsion (avulsion of a deciduous tooth) is the complete displacement of a milk tooth from its alveolar socket due to traumatic injury, most commonly affecting maxillary central incisors in children aged 1-3 years following falls (often during early walking and exploration). Unlike permanent tooth avulsion, where rapid replantation is the gold standard for tooth survival, primary tooth avulsion explicitly contraindicates replantation due to the close anatomical relationship of the deciduous root apex to the developing permanent tooth bud, which can be damaged by replantation forces, infection from the contaminated socket, or ankylosis-related disturbance.

Diagnostic assessment requires careful history (mechanism, timing, prior trauma), neurological evaluation (rule out concussion or more serious head injury especially in young children), thorough oral examination for associated injuries (lip lacerations, tongue trauma, dental fractures), location of the avulsed tooth (was it found, swallowed, aspirated?), and chest/abdominal imaging if aspiration cannot be ruled out. Radiographic evaluation (periapical, occlusal) confirms complete avulsion versus intrusion (which can mimic avulsion) and assesses the developing permanent successor.

Management protocol: do NOT replant the avulsed primary tooth, achieve hemostasis (gauze pressure), gentle saline lavage, soft tissue evaluation and suturing if necessary, antibiotic prophylaxis if heavy contamination, soft diet, oral hygiene maintenance with chlorhexidine swabs, parental education about possible sequelae to permanent successor (enamel hypoplasia 30-50%, eruption disturbance, root dilaceration, cyst formation), and follow-up at 1, 3, 6, 12 months and yearly until permanent successor erupts. Space maintainer use is debated; usually not necessary for incisors as adjacent teeth do not significantly drift, but may be considered for posterior teeth or aesthetic concerns.