Complications with the Harris-Galante porous-coated acetabular component after a mean follow-up of 7 years

Material and methods Hundred and twelve hip were studied in 107 patients with a mean follow-up of 7 years (range, 6-9 years). Harris and Poster-Merle d'Aubigne clinical hip scores were used. The prosthetic components were evaluated using radiographic criteria. Results The mean Harris score was 91 (range, 34-100). The incidence of proximal pain was 3,7 p.100 in anterior area and also 3,7 p.100 in posterior area. Radiolucent lines were present in one acetabular zone in 28,5 p.100 of cases, in two zones in 26 p.100, in all three zones in 5,5 p.100. No statistical significant correlation was identified relating pain and radiolucent lines. The mean rate of linear wear per year was 0,1 millimeter. A statistically significant correlation was identified relating a linear wear per year above 0,12 millimeter and the presence of radiolucent lines. A major polyethylene wear (from 2,75 to 3,5 millimeters) was found in 5 cases. One of them had an acetabular osteolysis. One acetabular liner was found unstable in the metal shell during a hip revision for a major wear. Two patients had a dislocation of the liner in the metal-back. Eight hips needed a revision surgery, always for a failure of the polyethylene liner, never for a loosening between the socket and the acetabulum. Discussion and conclusion The acetabular component bone fixation of this Harris-Galante prosthesis appears optimum. The polyethylene wear and the unstability between the polyethylene cup and the metal socket need to stop using this component. The fixation between his two parts have to be improved.