THA revision with extensively porous-coated stems. 32 hips followed 2-6.5 years

Since 1991, we have used 32 extensively porous-coated femoral stems with cylindrical distal cross-section for revision of failed cemented stems. At an average follow-up of 4 years, one stem had been re-revised due to a periprosthetic femoral fracture, but no aseptic loosening has been observed. The average postoperative Harris Hip Score was 84 points. Radiographically, 23 stems were well fixed with bone-ingrowth, which was mostly observed in the distal portion of the porous coating. Increased thickness and density of the thin cortical wall was also seen. Mild stress shielding was present in 4 cases, but was not progressive and gave no symptoms. An extensively porous-coated stem, with a cylindrical distal cross-section, seems to be a reasonable choice in femoral revision.