Postoperative rehabilitation
All patients used crutches for two weeks without bracing. The patients underwent a physiotherapist-guided rehabilitation program following surgery, in most cases for 3 months but with some regional differences. All patients were educated to continue knee stability self-training exercises after the guided physiotherapy period. Both departments serve as referral centers. The guided rehabilitation was carried out locally near the patient`s residence. Therefore, the duration of the guided rehabilitation period could be with regional differences.