Abstract
Background
The purpose of this study was to evaluate the clinical and radiographic outcomes of the rotating-platform, posterior-stabilized PFC Sigma at fifteen-year follow-up.
Methods
Between January 2000 and November 2001, two hundred consecutive patients underwent TKA with a rotating-platform, posterior stabilized total knee arthroplasty with cement. All patients have been followed prospectively and all patients with minimum 12 year follow up were included in this analysis. Forty-nine TKAs were available for our final analysis with a mean follow up of 16.0 years.
Results
The improvements in Knee Society pain and function scores were 44 to 83. The 15-year Koos Jr interval scores for cohort was 76.2. The range of motion improved from 111° to 115°. The prevalence of residual pain was 32.5%, painless crepitation was 15% and 5% reporting painful crepitation at 15-year follow up via PROMs. Kaplan-Meier analysis revealed that the survivorship was 100% due to mechanical failure as an endpoint, and 95% as reoperation as an end-point.
Conclusions
At fifteen-year follow up, the rotating-platform, posterior stabilized arthroplasty demonstrated excellent survivorship and radiographic results. Peripatellar crepitation, occasionally requiring excision, remains an issue.
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