The Inclination of the Proximal Tibiofibular Joint Surface and Medial Compartment Knee Osteoarthritis

Inclusion Criteria: * symptomatic knee osteoarthritis according to the American College of Rheumatology criteria for the classification and reporting of OA of the knee joint, * predominance of self-reported pain over the medial aspect of the knee, * radiographic evidence of medial compartment knee osteoarthritis with an Ahlbäck score of grade I or greater, * and radiographic evidence of lateral compartment with Ahlbäck classification grade 0. Exclusion Criteria: * any previous surgery or severe trauma in the affected limb. * inflammatory joint disease or tumors in the affected limb.