Revision total knee arthroplasty using the Kinemax Plus Superstabilizer prosthesis: Minimum 10-year follow-up

The results of revision total knee arthroplasty using the Kinemax Plus Superstabilizer prosthesis at a minimum of 10 years are reviewed. The implant was designed specifically for revision surgery with integral distal and posterior femoral build-ups and a modular metal reinforcement rod within the tibial polyethylene post. Eighteen consecutive knees revised for aseptic loosening or instability were studied prospectively and reviewed at 10–13 years (mean 11.6 years). Mean HSS scores improved from 51 to 86, KS knee scores from 40 to 83 and KS function scores from 48 to 82, with 83% good and excellent results. There was one re-revision for recurrent instability. Additional distal femoral add-ons were needed in 33% and posterior add-ons were needed in 22% of cases. No post breakage or deformation occurred. The design rationale has proven successful with satisfactory clinical and radiographic outcomes.