The knee joint is a modified hinge of synovial joint. It permits mainly flexion and extension movements, and small amount of rotation of the leg in the flexed position of the knee. It is described as a compound joint that includes two condylar joints between the femur and the tibia and a saddle joint between the patella and the femur. Osteoarthritis (OA) is a common chronic condition resulting in pain, fatigue, functional limitations, increased healthcare utilization and high economic costs to society Varus knee osteoarthritis is by far the commonest indication for total knee replacements in adults.Total knee arthroplasty is nevertheless indicated in patients with Varus osteoarthritis when marked joint destruction is present and pain or deformity compromise function

Varus knee, Knee Arthroplasty