Total knee arthroplasty with extra-articular angular deformity. Case report

Abstract

To establish the angular deformities in the femur that should be treated with unusual intra-articular bone resection plus total knee arthroplasty in tricompartmental arthrosis of the knee is one of the major challenges faced in orthopaedic surgery. The case is presented of a 67 year-old male patient with a history of diaphyseal fracture of the left femur (30 years ago) treated conservatively with malunion in left femoral diaphysis with 10◦ femoral valgus and left knee pain of 2 years onset. He was diagnosed with tricompartmental osteoarthritis of the knee associated with genu valgum of 20◦ . Surgical treatment was performed using intra articular «unusual» bone cuts and total knee arthroplasty. According to the scale proposed by the Knee Society Score, the patient obtained a score of 89 one year after surgery. In femoral deformities of up to 20◦ , it is usually sufficient to perform the correction with intra articular «unusual» bone cuts, and avoiding affecting the femoral ligament insertions.