Assesment of the Best Location of Corrective Osteotomy in Genuvarus

Knee osteoarthritis is a common etiology of disability in older age group. There are evidences suggesting that varus or valgus deformity can be from distal of femur، proximal of tibia or because of ligamentous laxity. Osteotomy in incorrect location may create zigzag deformity and may contribute to increase risk of osteoarthritis. The objective of this study was to find the correct location of deformity in genuevarum or genuevalgum. We studied 40 patients with knee deformity at a mean age of 27. 4 years (19-38)، prospectively. Standing 3-point view radiographs were obtained on each patient، and the limb axis was determined. The data on limb malalignment was analyzed statistically. In 94. 5% of cases the location of varus deformity was proximal of tibia and in 5. 5% in distal of femur، the best location of osteotomy. Our study also revealed multiple factors contributing to varus deformity، i. e. distal femur in 67. 5%of cases، proximal tibia deformity in 92. 5% of cases and ligamentous laxity in 77. 5%. Varus knee deformity can be from proximal tibia، distal femur or knee laxity. Before any corrective surgery one must clarify location of deformity