The purpose of this study was to evaluate the short term clinical results of the new anatomical reconstruction including 3 major posterolateral structures of the knee using a split Achilles allograft.

Eleven knees with posterolateral rotary instability underwent new anatomical posterolateral reconstruction between January 2002 and June 2003. The clinical results were assessed using the Lysholm score and Tegner activity level scales and physical examinations including posterolateral drawer test, dial tests at 30 and 90 ° of knee flexion, varus stress tests at 0 and 30 ° of knee flexion.

Follow-up averaged 26 months (range, 12 to 29 months). The mean preoperative Lysholm score was 38.6 and at the time of latest follow-up, the mean score was improved to 72.5. The mean preoperative Tegner activity level was improved from 1.6 points to 3.3. Ten out of 11 patients showed negative conversion of the posterolateral drawer test and varus stress test at 30 ° of flexion postoperatively. All patients, who showed positive signs on the external rotation-dial test at 30 ° of knee flexion preoperatively, improved postoperatively. In eight patients, preoperative positive signs of varus stress tests at 0 ° of knee flexion and the external rotation-dial test at 90 ° of knee flexion disappeared postoperatively.

This study suggests that the new anatomical reconstruction of posterolateral corner of knee is a reliable method providing excellent stability and satisfactory short term clinical results.