Hydroxyapatite-coated total hip arthroplasty: the impact on thigh pain and arthroplasty survival

The purpose of this study was to evaluate the long-term clinical outcomes of primary total hip arthroplasty using an uncemented, hydroxyapatite-coated implant. We followed a consecutive series of 164 patients, who underwent total hip arthroplasty with the Furlong fully-hydroxyapatite coated implant over a mean time period of 12.8 years. Clinical and radiological analyses were performed. Roentgenographic evaluation for the femoral side of the hip was performed using the Gruen zones, for the acetabular side using the DeLee and Charnley zones. Engh's radiological score was employed to assess fixation and stability of the stem. Clinical results were evaluated by Harris Hip Score. The mean Harris hip score was 46 preoperatively and 85 at last follow-up. The mean Engh score was 23. No hips had been revised for aseptic loosening of the femoral component. Thigh pain incidence was very low (1.2%). Survival analysis showed excellent results (95.8% at end point). The Furlong hydroxyapatite-coated implant appears as a reliable and safe option for hip arthroplasty.