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Coronoid fracture patterns.

Job N Doornberg1, David Ring

  • 1Orthopaedic Hand and Upper Extremity Service, Massachusetts General Hospital, Boston, MA 02114, USA.

The Journal of Hand Surgery
|January 31, 2006
PubMed
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Specific coronoid fracture types strongly correlate with distinct elbow instability patterns. Large fractures link to olecranon injuries, small transverse fractures to terrible-triad injuries, and anteromedial facet fractures to posteromedial rotational instability.

Area of Science:

  • Orthopedic Surgery
  • Traumatology
  • Anatomy

Background:

  • Coronoid process fractures are critical components of complex elbow injuries.
  • Understanding the relationship between coronoid fracture morphology and elbow instability patterns is essential for effective treatment.

Purpose of the Study:

  • To investigate the association between specific types of coronoid fractures and distinct patterns of traumatic elbow instability.
  • To test the hypothesis that coronoid fracture characteristics predict associated elbow injury patterns.

Main Methods:

  • A review of 67 coronoid fractures treated by a single surgeon over 7 years.
  • Fractures were classified based on surgical exposure and analyzed for association with elbow fracture-dislocation patterns using Pearson chi-square analysis.

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Main Results:

  • Significant associations were found: large coronoid fractures with olecranon fracture-dislocations (22/24), small (<50%) coronoid fractures with terrible-triad injuries (32/32), and anteromedial facet fractures with varus posteromedial rotational instability (9/11).
  • Statistical analysis confirmed strong correlations between coronoid fracture types and specific injury patterns.

Conclusions:

  • Large coronoid fractures are associated with anterior/posterior olecranon fracture-dislocations.
  • Small transverse coronoid fractures correlate with terrible-triad injuries.
  • Anteromedial facet fractures are linked to varus posteromedial rotational instability patterns.