14-year median follow-up using the press-fit condylar sigma design for total knee arthroplasty

J Arthroplasty. 2013 Sep;28(8):1286-90. doi: 10.1016/j.arth.2012.11.014. Epub 2013 Mar 27.


Median 14-year follow-up (mean 11.8 years) of a cemented primary posterior cruciate-retaining total knee arthroplasty (TKA) utilizing the Press-Fit Condylar (PFC) Sigma design was evaluated in 77 patients (79 TKA). Follow-up assessment included implant survivorship, x-rays, Knee Society rating system, and clinical evaluation. Radiographic analysis demonstrated minor non-progressive osteolysis in 40% (10/25) knees. Two revisions, one for instability at 4 years and one for polyethylene wear at 10 years were performed. Survivorship of the PFC Sigma knee implant was 97% using revision for any reason and 100% using aseptic loosening as endpoints. The PFC Sigma had excellent survivorship at 14 years, the longest clinical follow-up reported.

Keywords: outcomes; press-fit condylar sigma implant; total knee arthroplasty.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Knee*
  • Female
  • Follow-Up Studies
  • Humans
  • Knee Joint / diagnostic imaging
  • Knee Joint / surgery
  • Knee Prosthesis*
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Osteoarthritis, Knee / surgery*
  • Polyethylene
  • Postoperative Care
  • Prosthesis Design
  • Radiography
  • Time Factors
  • Treatment Outcome


  • Polyethylene