[Ways of treatment in chronic medial instability of the knee joint (author's transl)].

Especially Grade II and III of chronic anteromedial rotatory instability of the knee should be treated by static and dynamic extraarticular procedures of the medial compartment. For the treatment of deficient anterior cruciate ligament we advise intra-articular replacement with a medial strip of the patella tendon, otherwise we expect meniscal degeneration, osteoarthritis and progressive instability. In patients with considerable instability and in young persons in addition to the cruciate ligament repair a distal iliotibial-band transfer is recommended to avoid attenuation of intra-intraarticular and capsular ligaments.