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  • Title: Intraoperative Periprosthetic Femur Fracture: A Biomechanical Analysis of Cerclage Fixation.
    Author: Frisch NB, Charters MA, Sikora-Klak J, Banglmaier RF, Oravec DJ, Silverton CD.
    Journal: J Arthroplasty; 2015 Aug; 30(8):1449-57. PubMed ID: 25765131.
    Abstract:
    Intraoperative periprosthetic femur fracture is a known complication of total hip arthroplasty (THA) and a variety of cerclage systems are available to manage these fractures. The purpose of this study was to examine the in situ biomechanical response of cerclage systems for fixation of periprosthetic femur fractures that occur during cementless THA. We compared cobalt chrome (CoCr) cables, synthetic cables, monofilament wires and hose clamps under axial compressive and torsional loading. Metallic constructs with a positive locking system performed the best, supporting the highest loads with minimal implant subsidence (both axial and angular) after loading. Overall, the CoCr cable and hose clamp had the highest construct stiffness and least reduction in stiffness with increased loading. They were not demonstrably different from each other.
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