"The Rockwood classification (1998) is the most commonly used (c. 2025) classification system in use for acromioclavicular joint injuries 3,8,9."
"type I: normal radiographic appearance with clavicle not elevated with respect to the acromion"
"type II: widened acromioclavicular joint (>7 mm) with"
"type III: clavicle elevated above the superior border of the acromion, but the coracoclavicular distance is less than twice normal (i.e. 5 mm compared to the contralateral side)"
"type IV: clavicle displaced posterior into the trapezius (rare)"
"type V: clavicle markedly elevated and coracoclavicular distance more than double normal (i.e. >25 mm) - bilateral weight-bearing projections are able to distinguish type V injuries"
"type VI: clavicle inferiorly displaced behind coracobrachialis and biceps tendons (rare)"
"type I: normal radiographic appearance with clavicle not elevated with respect to the acromion"
"AC ligament: mild sprain"
"AC ligament: ruptured"
"AC ligament: ruptured"
"AC ligament: ruptured"
"AC ligament: ruptured"
"AC ligament: ruptured"
"type III: clavicle elevated above the superior border of the acromion, but the coracoclavicular distance is less than twice normal (i.e. 5 mm compared to the contralateral side)"