 Surgical Protocol : Approximately 10 - 21 days following the injury, patients will undergo the first surgical procedure on their knee dislocation. During the first procedure, they will have a Posterior Cruciate Ligament PCL reconstruction using an achilles tendon allograft, with the direct onlay, two bundle technique. Additionally, any damage to either the posterior medial or posterior lateral corner will be repaired not reconstructed, and any meniscus pathology will be addressed. The final step of this first procedure will be applying the CKH to patients randomized to the compass group the alignment pins will be placed prior to repair of the corner. Patients will undergo an ACL reconstruction if necessary approximately 8 weeks following the initial surgery, when the CKH will be removed. Additional surgeries will be performed on patients to treat motion problemsarthrofibrosis as well as recurrent instability on an as-needed basis. 