Hemi-arthroplasty means a half replacement joint operation. This occurs in cases of the so called femoral head necrosis, e.g. after fracture of the femoral neck. In these patients the surgeon may remove only the diseased femoral head and replace it with an artificial ball of the same dimensions. We offer to our clients superior quality artificial head which articulates with the healthy cartilage in the socket (acetabulum) of the hip joint. Jindal Medi Surge ball component is precision engineered and due care is taken that it has a equal diameter as the removed femoral head.