Survivorship of a Low-stiffness Extensively Porous-coated Femoral Stem at 10 Years
Hartzband, Mark, A., MD1; Glassman, Andrew, H., MD2; Goldberg, Victor, M., MD3; Jordan, Louis, R., MD4; Crowninshield, Roy, D., PhD5, a; Fricka, Kevin, B., MD6; Jordan, Louis, C., MD4Hip
A novel low-stiffness extensively porous-coated total hip femoral component was designed to achieve stable skeletal fixation, structural durability, and reduced periprosthetic femoral stress shielding. In short- to intermediate-term clinical review, this implant achieved secure biologic fixation and preserved periprosthetic bone. We retrospectively reviewed all 102 prospectively followed patients (106 implants) with this implant to document the longer-term implant survivorship, clinical function, fixation quality, and periprosthetic bone preservation. Ninety-seven patients with 101 implants had current followup or were followed to patient death (range, 1-14 years; average, 10 years). Eighty-six living patients were followed for an average implant survivorship of 10 years. There were no known femoral implant removals. The average Harris hip score at 10-year followup was 98. Radiographs demonstrated secure implant fixation and maintenance of periprosthetic bone. These data suggest this implant design provided long-term function characterized by extensive fixation, structural durability, and radiographic appearance of maintained periprosthetic cortical thickness and density.
Level of Evidence: Level I, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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