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 wi th cylindrical distal cross-section for revision of failed cemented st ems. 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 poin ts. Radiographically, 23 stems were well fixed with bone-ingrowth, whi ch was mostly observed in the distal portion of the porous coating. In creased 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 cylin drical distal cross-section, seems to be a reasonable choice in femora l revision.