RT Journal A1 LaPrade, Robert F. A1 Johansen, Steinar A1 Engebretsen, Lars T1 Outcomes of an Anatomic Posterolateral Knee ReconstructionSurgical Technique JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2011 FD March 16 VO 93 IS Supplement_1 SP 10 OP 20 DO 10.2106/JBJS.J.01243 UL http://dx.doi.org/10.2106/JBJS.J.01243 AB BACKGROUND:  Chronic posterolateral knee injuries often result in substantial patient morbidity and functional instability. The clinical stability and functional outcomes following anatomic reconstructions in patients with a chronic posterolateral knee injury have not been determined, to our knowledge.METHODS:  A two-center outcomes study of sixty-four patients with grade-3 chronic posterolateral instability was performed. The patients were evaluated subjectively with the modified Cincinnati and International Knee Documentation Committee (IKDC) subjective scores and objectively with the IKDC objective score.RESULTS:  Eighteen patients had an isolated posterolateral knee reconstruction, and forty-six patients underwent a single-stage multiple-ligament reconstruction that included reconstruction of one or both cruciate ligaments along with the posterolateral knee reconstruction. The average duration of follow-up was 4.3 years. The fifty-four patients who were available for follow-up had an average total Cincinnati score of 65.7 points. A significant improvement was found between the preoperative and postoperative IKDC objective scores for varus opening at 20°, external rotation at 30°, reverse pivot shift, and single-leg hop.CONCLUSIONS:  An anatomic posterolateral reconstruction resulted in improved clinical outcomes and objective stability for patients with a grade-3 posterolateral knee injury.LEVEL OF EVIDENCE:  Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.ORIGINAL ABSTRACT CITATION:  "Outcomes of an Anatomic Posterolateral Knee Reconstruction" (2010;92:16-22).