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Cubitus varus: significant factors

D G Chess1, J L Leahey, J C Hyndman

  • 1Hand and Upper Limb Centre, St. Joseph's Health Centre, University of Western Ontario, London, Canada.

Journal of Pediatric Orthopedics
|March 1, 1994
PubMed
Summary

Post-supracondylar fracture cubitus varus is primarily caused by varus angulation. Controlling this specific deformity is key to minimizing the condition after elbow fractures.

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Area of Science:

  • Orthopedic Surgery
  • Pediatric Orthopedics
  • Anatomy

Background:

  • Post-supracondylar fracture cubitus varus is a common complication following elbow fractures in children.
  • Understanding the specific biomechanical factors contributing to this deformity is crucial for effective clinical management.

Purpose of the Study:

  • To investigate the etiological factors contributing to post-supracondylar fracture cubitus varus.
  • To determine the relative importance of different angular and rotational deformities in the elbow.

Main Methods:

  • An in vitro anatomic experiment using elbow models.
  • Photography of 256 combinations of varus angulation, posterior angulation, internal rotation, and flexion contracture at 10-degree increments.

Main Results:

  • Varus angulation was identified as the most significant single factor contributing to cubitus varus deformity.
  • Flexion contracture and posterior angulation reduced the apparent deformity when combined with varus angulation.
  • Internal rotation exacerbated the cubitus varus deformity.

Conclusions:

  • Clinical management strategies should prioritize controlling varus angulation to minimize post-supracondylar fracture cubitus varus.
  • Varus angulation is the primary driver of this deformity, with other factors playing modifying roles.

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