抄録
Objective: Since porous tantalum resembles cancellous bone, it is unlikely to show stress shielding caused by physiological loads closer to normal on the peri-implant bone. Tantalum also has a high coefficient of friction and high porosity, and so strong fixation can be achieved immediately after surgery. We studied the interim results in patients with osteoarthrosis (OA) of the knee who had undergone total knee arthroplasty (TKA) using a porous tantalum tibial monoblock component.
Methods: The study involved 23 joints in 23 patients: 4 men and 19 women. The mean age at surgery was 74.0 years and the mean follow-up time was 5 years and 8 months. In preoperative testing, the range of motion, JOA score, and the presence/absence of a radiolucent line in plain X-rays were examined.
Results: The mean JOA score was improved. In many patients, the tip of the tibial components’ peg came into contact with cortical bone. The placement angle was rather good. No radiolucent line was observed in the examination. The mean operating time was 72.8±16.2 min and the minimum was 45 min.
Conclusion: The interim results for TKA using a porous tantalum tibial component to treat OA were good. Porous tantalum can be used as a material for cementless TKA to treat OA. A porous tantalum tibial component is a good choice after high tibial osteotomy in patients with OA.
