Abstract

Taylor's spatial frame (TSF) and Ilizarov external fixators (IEF) are two circular external fixator commonly used to address complex deformity and fractures. There is currently no data available comparing the biomechanical properties of these two external fixators. This study looks into the mechanical characteristics of each system. TSF rings with 6 oblique struts, 4 tube connectors, 4 threaded rods, and 6 threaded rods were compared to a standard IEF rings with 4 threaded rods. Compression and torsional loading was performed to the frame as well as construct with Polyvinylchloride tubes. TSF rings with 4 tube connectors had the highest stiffness (3288 N/mm) while TSF rings with 6 struts was the least stiff. The situation was reversed for torsion where TSF rings with 6 oblique struts had the highest torsional stiffness (82.01 Nm/Degree) and frame Ilizarov rings with 4 threaded rods the least. Standard TSF construct of two ring with 6 oblique struts have better torsional stiffness and lower axial stiffness compared to the standard IEF. Taylor's Spatial Frame, Ilizarov External Fixator, Biomechanical properties.

Highlights

  • Conventional Ilizarov external fixator (IEF) is composed of stainless steel rings connected with threaded rods that can be configured in various ways to Manage different indications

  • Frames B,C,D.E were significantly stiffer than Frame A (TSF rings with 6 oblique struts, p

  • In torsional loading, Frame A recorded the highest torsional stiffness of 82.01 Nm/ degree, and this was significantly stiffer compared to Frame E and Frame C (TSF and IEF rings with 4 threaded rods)

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Summary

Introduction

Conventional Ilizarov external fixator (IEF) is composed of stainless steel rings connected with threaded rods that can be configured in various ways to Manage different indications. The frame is fixed to the bone using either stainless steel wires under tension or rigid Schanz pins that causes minimally disruption of the soft tissue. These basic Ilizarov external fixator construct and method of fixation provides favorable mechanical and biological environment for bone healing 1, 2. We conducted this study to compare the mechanical properties of IEF and multiaxial external fixator

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