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