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Allman Classification

Type Injury Severity
Type I Acromioclavicular joint injury
Type II Acromioclavicular joint subluxation (injury to joint capsule, acromioclavicular ligament (ACL), coracoclavicular ligament (CCL))
Type III Complete dislocation of acromioclavicular ligament (ACL) and coracoclavicular ligament (CCL)
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