Abstract
We report a case of the sinking of the tibial component in an early postoperative period after total knee arthroplasty. The patient was a 68-year-old female. She has been on conservative treatment for right knee osteoarthritis for five years.
X-ray showed severe bone loss of her medial tibial condyle. We performed total knee arthroplasty using a 5 mm augmentation block to the medial tibial condyle. However, X-ray showed the loosening and sinking of the tibial component seven months after the operation. We performed revision total knee arthroplasty using a 10 mm augmentation block and long-stem. When treating such cases of severe bone loss of the tibial codyle, MRI is useful for the evaluation of the area of the osteonecrosis. Surgery must also be planned to complete resection of the osteosclerotic area inclusing osteonecrosis.
