schenck classification schenck classification the schenck classification is a system of categorizing knee dislocations based on the pattern of multiligamentous injury. it is limited clinically by not describing the risk of neurovascular involvement. classification type description i single ligament injury (acl or pcl) ii injury to acl and pcl iii injury to acl, pcl, and either the lcl or mcl *kd-iii injuries are sub classified as kd-iii-m or kd-iii-l depending on whether the mcl or lcl/posterolateral corner are injured iv injury to acl, pcl, lcl and mcl v multiligamentous injury with periarticular fracture