Score: Allman classification

Use: Clavicular fractures

Group I

Fractures of the middle third (80%)

Group II

Fractures of the distal third (12-15%)
  • Type I: fracture occurs between coracoclavicular and acromioclavicular ligaments (stable)
  • Type II: fracture medial to the coracoclavicular ligament (unstable)
  • Type IIA: both ligaments (conoid and trapezoid) attached to the distal fragment
  • Type IIB: conoid is torn but trapezoid ligament attached to the distal fragment
  • Type III: fracture involves the acromioclavicular joint without coracoclavicular injury
  • Group III

    Fractures of the proximal third (5-6%)

    Reference

    Classification and Diagnosis in Orthopaedic Trauma. Editors: Rahij Anwar, Kenneth W. R. Tuson, Shah Alam Khan. Cambridge University Press, 2008