Minimal 11-year follow-up of extensively porous-coated stems in femoral revision total hip arthroplasty.
Between 1984 and 1989, 188 consecutive femoral revision surgeries were performed. Eighteen patients died or were lost to follow-up, and the remaining 170 patients were followed for 11 to 16 years (mean, 14.2 years). Radiographic evidence of a bone ingrown stem was present in 82% of the hips, stable fibrous fixation was present in 14% of the hips, and 4% of the hips were unstable. Six stems were revised to a larger, fully coated cementless implant. Proximal femoral osteolysis was seen in 23% of femora but was limited to Gruen zones 1 and 7. No diaphyseal osteolysis was seen. The overall mechanical failure rate in this series was 4.1%. Failure of fixation correlated highly with extent of bone loss present at the time of surgery. On the basis of the radiographic and clinical results at a mean follow-up of 14.2 years, we recommend the use of extensively coated femoral stems in revision hip arthroplasty.
Weeden
Steven H
SH
Texas Hip and Knee Center, Fort Worth, Texas, USA.
Paprosky
Wayne G
WG
D019644:Arthroplasty, Replacement, Hip; D020099:Coated Materials, Biocompatible; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation
D020099:Coated Materials, Biocompatible