Optimation of single radius system design on total knee arthroplasty for Indonesian’s need

Total Knee Arthroplasty (TKA) has been widely used as a way to treat knee joint disorders. The development of a single radius system at TKA is expected to meet the needs of Asians, especially Indonesians. It’s used to support religious, social and cultural activities. These activities need 150°-165° flexion angle, while currently the flexion angle that TKA wearers can achieve is below 150. This study aims to determine the effect of the femoral condyle radius on the range of flexion angles, as well as the TKA stability on the gap difference (GD). The method used in this study refers to previous study, by varying the femoral condyle radius design. Variations in the femoral condyle radius that are applied are 21.5 mm, 22 mm, 22.5 mm (reference model), 23 mm, and 23.5 mm. The results of this study showed that the most optimal TKA design is 23.5 mm on femoral condyle radius. This variant capable of chieving a flexion angle of 164.5°, and stability of GD-based shows 1.3 mm. This study indicated a better design than before, and are expected to provide comfort for patients.