Patient selection
contracture, knee flexion
SYSTEMIC DISEASE
The inclusion criteria were: (1) idiopathic or secondary osteoarthritis of the medial femoral compartment of the knee; (2) varus or valgus deformity < 3°; (3) knee flexion > 100°; (4) flexion contracture < 10°; (5) integrity of cruciate and collateral ligaments; (6) minimum of 24 months follow-up. The exclusion criteria were: (1) age < 80 years; (2) revision arthroplasty; (3) previous surgery of the affected knee (except meniscectomy); (3) uncontrolled systemic disease; (5) patient unable to understand the nature of the present study.