Inclusion and exclusion criteria
knee arthroplasty, primary knee osteoarthritis, TKA, femoral fracture
RHEUMATOID ARTHRITIS, OSTEOARTHRITIS, SEPTIC ARTHRITIS
All patients with primary knee osteoarthritis above the age of 50 years requiring TKA were potentially eligible. Patients younger than 50 years of age, those with a history of tibial or femoral fracture, osteotomy, septic arthritis, rheumatoid arthritis, or previous (partial) knee arthroplasty at the side of osteoarthritis, were excluded (Fig. 