Type I: Sprain of the acromio-clavicular or coracoclavicular ligament

Type II: Subluxation of the acromioclavicular joint associated with a tear of the acromioclavicular ligament; coracoclavicular ligament is intact.

Type III: Dislocation of the acromioclavicular joint with injury to both acromioclavicular and coracoclavicular ligaments

Type IV: Clavicle is displaced posteriorly through the trapezius muscle

Type V: Gross disparity between the acromion and clavicle, which displaces superiorly

Type VI: Dislocated lateral end of the clavicle lies inferior to the coracoid


Provide an explanation for key principles and pertinent aspects of the classification



Provide the citation for the landmark article and recent review articles describing the classification