[Can knee joint proprioception by reconstruction of the anterior cruciate ligament be restored? A prospective longitudinal study].

Knee proprioception was assessed in 20 healthy volunteers, 10 patients with acute anterior instability and in 20 patients with chronic anterior instability preoperatively as well as after 3 and 6 months postoperatively. To determine proprioception, an angle reproduction test was performed. There were no differences between the right and the left knee joint or between men and women. Best proprioception was measured near full extension. The acute trauma causes massive damage of the proprioception, which could be improved significantly by rehabilitation. However, rehabilitation could not restore proprioception. 3 months postoperatively, there was a slight decrease of proprioception as compared to the preoperative values, but 6 months after reconstruction, restoration of proprioception was documented near full extension and full flexion. In the mid range position, the proprioception could not be restored. There was no difference between open and arthroscopic techniques. The highest correlation was found between proprioception and patient's satisfaction.