To evaluate minimum 5-year results of total hip arthroplasty using a hydroxyapatite (HA)-coated anatomic femoral stem.

Fifty hips in 46 patients, received total hip arthroplasty using a HA-coated anatomic femoral component, between March 1992 and April 1995, 39 hips (36 patients) were available for this study.

The mean preoperative Harris hip score of 55.2 points increased to 91.5 points at one year, but reduced to 81.9 points at the last follow-up. Radiolucency was seen in 5 hips (12.8%) on the last follow-up radiograms. Femoral osteolysis occurred in 7 hips (17.9%) on the last follow-up radiograms. Four femoralstems (10.3%) were revised due to femoral osteolysis and loosening. The average duration between index operation and revision was 123 months.

The HA-coated anatomical femoral stem gave an increased Harris hip score and lowered the incidence of thigh pain, however it did not prevent osteolysis due to polyethylene wear.