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Conception of a navigation system controlling diaphyseal fracture reduction treated with external fixation

✍ Scribed by T. Leloup; W. El Kazzi; F. Schuind; N. Warzée

Publisher
Wiley (Robotic Publications)
Year
2009
Tongue
English
Weight
372 KB
Volume
5
Category
Article
ISSN
1478-5951

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✦ Synopsis

Abstract

Background

The reduction of long bone fractures treated with external fixation is usually performed with fluoroscopic images, which include several disadvantages: 2D information, distortions, and irradiation to the patient and the surgical team. This article presents a new navigation technique to control the reduction of such fractures while minimizing the irradiation.

Methods

Optically tracked markers are fixed to pins inserted into the bone fragments. These last are modelled using two initial calibrated radiographs. The models can be improved with several types of anatomical data and are displayed in real time.

Results

This navigation system was tested on dry bones and an anatomical specimen leg.

Conclusions

This new technique allows the visualization of the fracture in real time and from any viewpoint during the reduction. Irradiation is minimized using only two X‐ray images. Copyright © 2009 John Wiley & Sons, Ltd.

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The reduction offiactures by means of an Ilr&rov 'sfiator is obtained by successively shortening or lengthening the rods. This entails that all reduction operations of the fracture stumps be ptiormed with a series of empirical attempts, requiring great experience and manual dexterity in the surgeon.