Modified Eriksson procedure for chronic anterior cruciate instability.

The results of ten knee reconstructions done for chronic anterior cruciate instability were analyzed. Reconstruction was done by utilizing the medial one third of the patellar tendon as an intraarticular substitute for the anterior cruciate ligament. In addition, dynamic back-up was provided by the pes anserinus and biceps tendons. No patient regained normal stability, but early results showed both clinical and functional improvement. It is suggested that one should consider primary reconstruction of the anterior cruciate utilizing this technique if acute primary repair cannot be accomplished.