Background: The Press-Fit Condylar total knee arthroplasty implant
design has been used by many orthopaedic surgeons over the last twenty years.
The design has survived with relatively minor modifications and remains a
popular implant system today. The present study represents the fourteen to
seventeen-year results for our patients who were described in our previous
report on the eight to ten-year results.
Methods: The senior author performed 160 consecutive total knee
arthroplasties with use of the Press-Fit Condylar cruciate-retaining device in
134 patients between 1986 and 1989. The mean age of the patients at the time
of the index procedure was 70.5 years. Follow-up data were available for
sixty-three of sixty-four surviving knees. Surviving patients were followed
for a mean of 15.8 years. The knees were evaluated on the basis of Knee
Society function and clinical scores, radiographs, and survivorship
Results: The mean Knee Society function score was 65, and the mean
clinical score was 89. The overall survival rate of the knee was 91.5% with
revision for any reason as the end point and 97.2% with aseptic loosening as
the end point. The rate of revision of the tibial insert because of
wear-related aseptic loosening was 2.5%. We found no relationship between
revision and the shelf life or method of sterilization of the polyethylene
insert. Radiolucent lines were present in 62% (twenty-one) of thirty-four
knees; all radiolucent lines were nonprogressive. None of the implants were
loose according to the criteria of the Knee Society.
Conclusions: This long-term analysis indicates that the Press-Fit
Condylar total knee implant is a successful implant system with excellent
Level of Evidence: Therapeutic Level IV. See Instructions
to Authors for a complete description of levels of evidence.