Proprioception in anterior cruciate ligament reconstruction. Endoscopic versus open two-tunnel technique - A prospective study

ACL-reconstruction with patellar tendon autograft is a standard procedure w hich can be performed arthroscopically with a femoral half tunnel drilled f rom the joint or using the two-tunnel technique with medial miniarthrotomy and additional femoral approach. The arthroscopic procedure with single inc ision was hypothesized to improve proprioception and to provide earlier reh abilitation. Twenty-nine patients with chronic ACL-deficiency were included in the prospective study. Fifteen patients were operated endoscopically, 1 4 patients using the two-tunnel technique. Proprioception, Lysholm and Tegn er scores as well as stability (KT-1000) were assessed preoperatively, 3 an d 6 months postoperatively as well as after 3.9 +/- 0.4 years. A significan t deficit of proprioception was assessed in both groups preoperatively. Six months postoperatively, both groups showed a restitution of proprioception near full extension and full flexion of the knee. In the mid-range positio n, the proprioception could not be restored. At the final examination after 3.9 years, the deficit documented in the mid-range position still persiste d. There were no differences in proprioception, clinical results and stabil ity between the arthroscopic and the open technique.