Mechanical Performance of External Fixators With Wires for the Treatment of Bone Fractures—Part I: Load-Displacement Behavior

[+] Author and Article Information
C. Delprete, M. M. Gola

Dipartimento di Meccanica, Politecnico di Torino, 10100 Torino, Italia

J Biomech Eng 115(1), 29-36 (Feb 01, 1993) (8 pages) doi:10.1115/1.2895467 History: Received July 18, 1990; Revised June 18, 1992; Online March 17, 2008


Using matrix algebra, a mathematical model is formulated for a particular type of external fixator with wires (system developed by Ilizarov) for the treatment of bone fractures. The mathematical model is used to give a linear estimate of the stiffness under lateral and axial loads in a representative number of practical conditions. Relative displacements of the bone ends at the fracture site are calculated not only in the common case of a gap, but also for various angles of inclined sliding contact; in this case, a realistic load is applied and nonlinear stiffening of the wires under transversal loads is iteratively taken into account.

Copyright © 1993 by The American Society of Mechanical Engineers
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