• Stephan Brand, Johannes Klotz, Thomas Hassel, Maximilian Petri, Max Ettinger, Friedrich-Wilhelm Bach, Christian Krettek, and Thomas Gösling.
• Trauma Department Hannover Medical School, MHH, Germany. Electronic address: brand.stephan@mh-hannover.de.
• Med Eng Phys. 2014 Feb 1; 36 (2): 239-43.

BackgroundThe purpose of this study was to develop a new fixation technique for the treatment of periprosthetic fractures using intraprosthetic screw fixation. The goal was to biomechanically evaluate the increase in primary fixation stability compared to unicortical locked-screw plating.MethodsA Vancouver C periprosthetic fracture was simulated in femur prosthesis constructs. Fixation was then performed with either unicortical locked-screw plating using the LISS-plate or with intraprosthetic screw fixation. Fixation stability was compared in an axial load-to-failure model.ResultsThe intraprosthetic fixation model was superior to the unicortical locked-screw fixation in all tested devices. The intraprosthetic fixation model required 11,807N±1596N for failure and the unicortical locked-screw plating required 7649N±653N (p=0.002).ConclusionIntraprosthetic screw anchorage with a special prosthesis drill enhances the primary stability in treating periprosthetic fractures by internal fixation.Copyright © 2013 IPEM. Published by Elsevier Ltd. All rights reserved.

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