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  • Title: Effect of wire tension on stiffness of tensioned fine wires in external fixation: a mechanical study.
    Author: Antoci V, Voor MJ, Antoci V, Roberts CS.
    Journal: Am J Orthop (Belle Mead NJ); 2007 Sep; 36(9):473-6. PubMed ID: 17948150.
    Abstract:
    To determine the effect of changes in magnitude of transfixion wire tension on stiffness of fine-wire external-fixation load deformation, we compared results obtained with different wire tensions (50-140 kg) under identical conditions of central axial compression, medial compression-bending, posterior compression-bending, posteromedial compression-bending, and torsion. Stiffness values were calculated from the load-deformation and torque-angle curves. Tension of 140 kg provided the most stiffness, and there was a trend toward increasing overall stiffness with increasing wire tension. The 1.8-mm wires should be tensioned to at least 110 kg in most cases of fine-wire external fixation; compared with all tensions less than 110 kg, this tension provides significantly more mechanical stability in all loading modes.
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