Fracture site motion with Ilizarov and "hybrid" external fixation

Journal of Orthopaedic Trauma
C KhalilyD Seligson

Abstract

To evaluate differences in fracture site motion by using different external fixators. A wooden dowel was used to simulate a long bone with a transverse diaphyseal fracture. Ilizarov, "hybrid," and strutaugmented "hybrid" external fixation was used to stabilize the "fracture." The wooden dowel was subjected to separate axial, four-point bending, and torsional loads. Fracture site motion in the axial plane, off-axis motion (shear and bending), and rotation were measured. All mechanical testing was performed with a sevohydraulic test frame (MTS Systems, Minneapolis, MN, U.S.A.). Fracture site motion was measured with an interfragment motion device developed in this laboratory. Comparison was made between a traditional fourring Ilizarov fixator, a "hybrid" fixator using rings and threaded pins attached by a unilateral aluminum bar, and a "hybrid" fixator augmented with a V-shaped strut. Load-deformation behavior in axial displacement, shear displacement, and bending displacement were compared between the different configurations under identical conditions of axial loading, torsional loading, and four-point bending. In torsional loading, rotational displacement was also measured. The Ilizarov configuration allowed significantly less...Continue Reading

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Citations

Jun 4, 2008·Journal of Pediatric Orthopedics·Eric R HendersonFrederick J Kummer
Mar 28, 2012·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·M J SocieP Kurath
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