PMID: 9450253Feb 5, 1998Paper

The design and performance of an experimental external fixator with variable axial stiffness and a compressive force transducer

Medical Engineering & Physics
E R DraperJ P Paul

Abstract

A unilateral external fixator has been designed for controlled experiments into the effects of micromovement on fracture healing. The experimental model used is based on a diaphyseal osteotomy of the right tibia of the sheep. The main bar has linear bearings, which allows free axial movement. This is then controlled by a spring whose stiffness can be varied. The resulting axial micromovement can be calculated from the measured compressive force and the known axial stiffness of the fixator. The transducer has limits of error of +13.3 N and -44.5 N. Preliminary measurements showed maximum micromovement at the fracture site of 0.48 mm during slow walking.

References

Jan 1, 1985·Engineering in Medicine·A E ChurchesJ Gwillim
Dec 1, 1995·Medical Engineering & Physics·E R DraperJ P Paul
May 1, 1992·Clinical Biomechanics·J B RichardsonJ L Cunningham

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Citations

Aug 19, 2006·Biomechanics and Modeling in Mechanobiology·Antonio MeledduPhilippe K Zysset
Sep 1, 2015·Medical Engineering & Physics·J Mora-MacíasJ Domínguez
Oct 23, 2013·Journal of the Mechanical Behavior of Biomedical Materials·J A AliertaJ M García-Aznar
Jun 12, 2003·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Petra KleinGeorg N Duda
Apr 24, 2010·Revista do Colégio Brasileiro de Cirurgiões·Márcio Hiroaki KumeMarcia Regina Zanello Pundek

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