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How common are refractures in childhood?

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Pediatric refractures are uncommon, with the forearm being most susceptible. The risk of refracture significantly decreases after specific timeframes, varying by bone segment, guiding activity restrictions for children.

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Area of Science:

  • Pediatric orthopedics
  • Traumatology
  • Bone healing

Background:

  • Refractures in children can lead to prolonged disability and healthcare costs.
  • Understanding the incidence and timing of refractures is crucial for effective management and prevention strategies.

Purpose of the Study:

  • To determine the incidence of refractures in children across all long bones.
  • To identify the time intervals after which the risk of refracture diminishes for different bone segments.

Main Methods:

  • Analysis of data from the Swedish Fracture Register for children under 16 with long bone fractures (May 2015 - Dec 2020).
  • Definition of refracture as a new fracture in the same bone segment within one year of the initial injury.
  • Examination of fracture location, patient demographics, and time to refracture.

Main Results:

  • Out of 40,090 primary fractures, 348 (0.88%) resulted in refractures.
  • Diaphyseal forearm fractures showed the highest refracture incidence (3.4%).
  • Median time to refracture was 147 days; risk decreased after 180 days for diaphyseal forearm, 90 days for distal forearm, and 135 days for diaphyseal tibia fractures.

Conclusions:

  • Refractures in children are rare but segment-specific, with diaphyseal forearm fractures posing the highest risk.
  • Activity restrictions are recommended for 3 months (distal forearm), 6 months (diaphyseal forearm), and 4.5 months (diaphyseal tibia) post-fracture to mitigate refracture risk.