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Related Experiment Video

Updated: Jun 3, 2026

Intermediate Strain Rate Material Characterization with Digital Image Correlation

Intermediate Strain Rate Material Characterization with Digital Image Correlation

Published on: March 1, 2019

Reduction in wire tension caused by dynamic loading. An experimental Ilizarov frame study.

Valentina La Russa¹, Bjørn Skallerud, Jomar Klaksvik

¹Norwegian Orthopaedic Implant Research Unit, NKSOI, Orthopaedic Department, Bevegelsessenteret, St. Olavs Hospital, Trondheim University Hospital, 7006 Trondheim, Norway. valentina.larussa@ntnu.no

Journal of Biomechanics

|April 2, 2011

Summary

Wire fixators in Ilizarov frames are crucial for maintaining tension. Designs with larger, rougher surfaces significantly reduce tension loss caused by slippage, improving mechanical stability.

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Area of Science:

Orthopedic biomechanics
Biomaterials engineering

Background:

Transosseous wires are key components of the Ilizarov frame.
Maintaining wire tension is critical for the frame's transversal stiffness.
Wire fixators connect wires to the frame ring, influencing overall stability.

Purpose of the Study:

To evaluate the performance of three distinct wire fixator designs.
To assess the ability of fixators to maintain wire tension under dynamic loading.
To identify design features that minimize tension loss and slippage.

Main Methods:

A simplified Ilizarov frame setup with one ring and one wire was used.
Sixty wires were subjected to dynamic loading (200N, 450 cycles).
Tension loss, wire slippage, and deflection were measured at two pretension levels (883N, 1275N).

Main Results:

Significant differences in fixation ability were observed among the three designs.
Fixators with larger, rougher contact surfaces exhibited substantially less tension loss.
Wire slippage was identified as the primary cause of tension loss, exceeding plastic deformation.

Conclusions:

Wire fixator design significantly impacts the maintenance of wire tension.
Optimizing fixator design, particularly contact surface characteristics, can enhance mechanical stability.
Improved fixator designs hold potential clinical benefits for Ilizarov frame applications.