Results of revision knee arthroplasty in a patient with malposition of implant components (clinical case)

Endoprosthetics is currently the most effective treatment for terminal stages of knee gonarthritis. However, changes in knee kinematics after surgery sometimes lead to poor clinical outcomes. This article presents the treatment outcomes for patient A., 59, diagnosed with stage 3 right-sided idiopathic gonarthritis, pain syndrome, and varus deformity of the right lower extremity. She underwent right knee arthroplasty. For two years after surgery, the patient experienced pain in the anterior knee joint. She was diagnosed with malposition of the endoprosthesis components. Revision arthroplasty was performed with replacement of the endoprosthesis components and restoration of the joint line. A good functional outcome was achieved. Restoration of the joint line during endoprosthetics is a crucial part of normal knee biomechanics. The correct position of the joint line is determined using the joint line distalization coefficient.