[PSO modular hip endoprosthesis--personal experiences]

Hip prosthesis reimplantation, particularly with concomitant bone destruction around the stem, leading to a total loss of mechanical properties of the joint, is a major concern of modern orthopedics. Between may 1998 and August 2000 nine reimplantation procedures were performed in our Department. All were performed with the use of the Biomet PSO system. In four cases reimplantation was performed because of aseptic loosening of the prosthesis, with massive bone destruction around the stem. In three cases surgery was necessary because of loosening of reimplanted prosthesis. In two cases PSO prosthesis was used because of intertrochanteric fracture instability concomitant with massive femoral head and intertrochanteric bone destruction. Functional assessment was based on the Merle d'Aubigne classification. On 6 points were attained before surgery and 10 points--6 months post-up, the difference resulting from a decrease of pain. Luxation of the prosthesis was noted in two cases one 15 days after surgery and the other one 6 months post-up. In our opinion use of PSO endoprosthesis is a very valuable method of treating cases with bone destruction of the femur following loosening of hip prosthesis.