Excellent survival and good outcomes at 15 years using the Press Fit Condylar Sigma total knee replacement

William M. Oliver, Calum H. C. Arthur, Alexander M. Wood, Robert A. E. Clayton, Ivan J. Brenkel, Phil Walmsley

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3 Citations (Scopus)


Background: We report 15-year survival, clinical and radiographic follow-up data for the Press Fit Condylar Sigma total knee replacement (PFC Sigma TKR).

Methods: Between October 1998 and October 1999, 235 consecutive TKRs were performed in 203 patients. Patients were reviewed at a specialist nurse-led clinic prior to surgery, and at five, eight-to-ten and 15 years postoperatively. Clinical outcomes, including Knee Society Score (KSS), were recorded prospectively at each clinic visit, and radiographs were obtained.

Results: Of our initial cohort, 99 patients (118 knees) were alive at 15 years, and 31 patients (34 knees) were lost to follow-up. 13 knees (5.5%) were revised; five (2.1%) for infection, seven (3%) for instability and one (0.4%) for aseptic loosening. Cumulative survival with the end-point of revision for any reason was 92.3% at 15 years, and with revision for aseptic failure as the end-point was 94.4%. The mean KSS knee score was 77.4 (33 to 99) at 15 years, compared with 31.7 (2 to 62) preoperatively. Of 71 surviving knees for which X-rays were available, 12 (16.9%) had radiolucent lines and one (1.4%) demonstrated clear radiographic evidence of loosening.

Conclusion: The PFC Sigma TKR represents a durable, effective option for patients undergoing knee arthroplasty, with excellent survival and good clinical and radiographic outcomes at 15 years.
Original languageEnglish
JournalThe Journal of Arthroplasty
VolumeIn press
Early online date27 Mar 2018
Publication statusE-pub ahead of print - 27 Mar 2018


  • Total knee arthroplasty
  • Implant survival
  • Patient-reported outcome measures


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