Finally , with use of a variety of vali date d measures , there was no difference between the two groups in terms of functional status at two , eight , and ten years , regardless of the measure used .
A less expensive all-polyethylene component as part of a total knee arthroplasty has results equivalent to those obtained with a cemented metal-backed tibial component .
BACKGROUND The cost of the implant as part of a total knee arthroplasty accounts for a substantial portion of the costs for the overall procedure : all-polyethylene tibial components cost considerably less than cemented metal-backed tibial components .
We performed a systematic review of the literature to determine whether the clinical results of lower-cost all-polyethylene tibial components were comparable with the results of a more expensive metal-backed tibial component .
Scintimetry after total knee arthroplasty. Prospective 2-year study of 18 cases of arthrosis and 15 cases of rheumatoid arthritis.
33 consecutive patients ( 18 arthrosis , 15 rheumatoid arthritis ) , operated on with total knee arthroplasty and r and omized to cemented ( 18 knees ) or cementless fixation ( 15 knees ) , were investigated with scintimetry 3 , 6 , 12 , and 24 months postoperatively .  Migration was evaluated with simultaneous  roentgen stereophotogrammetric ( RSA ) examinations .  The scintimetric activity in the ipsilateral femoral diaphysis decreased and the activity in the tibial diaphysis increased during the observation period . Constant and low activity was recorded in front of the femoral component . This region was chosen as a reference . Three months after surgery , high activity was noted under the tibial component in knees with a preoperative varus deformity . After 2 years , the activity had decreased to the same level as in the patients with a valgus deformity . Diagnosis and mode of fixation did not influence the activity . Low postoperative activity was recorded in the tibial metaphyses if no rotatory displacement of the tibial component occurred
Finally , with use of a variety of vali date d measures , there was no difference between the two groups in terms of functional status at two , eight , and ten years , regardless of the measure used .
A less expensive all-polyethylene component as part of a total knee arthroplasty has results equivalent to those obtained with a cemented metal-backed tibial component .
BACKGROUND The cost of the implant as part of a total knee arthroplasty accounts for a substantial portion of the costs for the overall procedure : all-polyethylene tibial components cost considerably less than cemented metal-backed tibial components .
We performed a systematic review of the literature to determine whether the clinical results of lower-cost all-polyethylene tibial components were comparable with the results of a more expensive metal-backed tibial component .