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 .
Concave versus posterior-stabilized tibial joint surface in total knee arthroplasty: randomized evaluation of 47 knees.
Forty-seven knees in 43 patients with severe deformities r and omly received AMK total knee arthroplasty with concave ( C , n = 25 ) or posterior-stabilized ( PS , n = 22 ) polyethylene insert and with resection of the posterior cruciate ligament . Radiostereometric examinations were done postoperatively and after 3 , 12 , and 24 months . Two patients ( 1 C , 1 PS ) underwent revision surgery . At the 2-year follow-up , the median absolute rotations of the tibial inserts ranged from 0.13 degrees to 0.26 degrees ( C vs PS ; P = .1-.7 ) . The maximum total point motion was almost identical in the 2 groups ( C , 0.38 ; PS , 0.39 ; P = .9 ) . Maximum subsidence , lift-off , and Hospital for Special Surgery scores did not differ ( P = .1-.6 ) . Recipients of 20 of 24 knees with concave design and 14 of 19 knees with posterior-stabilized design reported that their knee could be regarded as normal or almost normal . Variations of the configuration of the polyethylene insert did not alter the outcome in the short term
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 .