Retropatellararthrose bei Arthrofibrose

There is a high incidence of patellofemoral arthritis following arthrofibrosis of the knee. Common reasons are ligament reconstruction during the acute inflammatory period, knee fractures, reflex sympathetic dystrophy, immobilisation and infection. Patellofemoral arthritis following arthrofibrosis is caused by an increased retropatellar pressure due to scar tissue formation in knee and capsule, infrapatellar contraction syndrome, lack of extension and chronic inflammatory reaction. The aim of treatment is to restore nearly normal mobility of the knee and patella. Arthroscopic arthrolysis should be performed when conservative treatment fails. In some cases, lateral, medial and posterior releases are indicated. Full extension of the knee, restored mobility of the patella and a strengthened quadriceps muscle are positive prognostic factors.