SURVIVORSHIP ANALYSIS OF CEMENTED TOTAL HIP-ARTHROPLASTY ACETABULAR COMPONENTS IMPLANTED WITH 2ND-GENERATION TECHNIQUES

The clinical and radiographic results of primary cemented total hip ar throplasty performed by a single surgeon, with particular emphasis on the performance of acetabular components implanted with so-called seco nd-generation cement techniques, were studied. Seventy hips with 48 me tal-backed and 22 polyethylene acetabular components were followed for a mean of 9 years (range, 5-11.5 years). The clinical results were ev aluated using a recognized hip score. The fixation status of the cemen ted acetabular component was evaluated using two methods of measuring radiolucent lines at 5 years and at the last evaluation. Acetabular co mponent loosening was defined as a circumferential radiolucent line, c omponent migration, or revision for loosening. This study was unable t o confirm the findings of others that demonstrated higher failure rate s with cemented metal-backed components when compared with all-polyeth ylene components. The survival of cemented acetabular components with 28-mm head femoral prostheses was worse than the survival of cemented acetabular components with 22-mm femoral heads in other published repo rts, despite advances in cement techniques. Because of the high rate o f loosening of cemented 28-mm-inner-diameter acetabular components at 5 and 10 years, the authors no longer use these cemented components fo r acetabular reconstruction.