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International Orthopaedics
Published in: International Orthopaedics 11/2011

01-11-2011 | Original Paper

The effect of pelvic movement on the accuracy of hip centre location acquired using an imageless navigation system

Authors: Sebastien Lustig, Cyrille Fleury, Elvire Servien, Guillaume Demey, Philippe Neyret, Simon T. Donell

Published in: International Orthopaedics | Issue 11/2011

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Abstract

Objective

The aim of this study was to assess the accuracy of an imageless navigation system in localising the hip centre and to evaluate the effect of pelvic movement on the accuracy of hip centre acquisition.

Material and methods

A phantom leg was constructed to simulate the hip joint and upper femur. A 3D measurement device was used to measure precisely the co-ordinates of hip centre. A limber link simulated hip motion as used when defining the hip centre during computer-assisted surgery. The data generated by the 3D measurement device and the image-free navigation system was compared with increasing amounts of simulated pelvic movement.

Results

For moderate pelvic movement (5 mm) the mean error of the hip centre ranged between 1.5 mm and 3.9 mm with a corresponding angular error of between 0.25° and 0.64°. In conditions of excessive pelvic movement (15 mm) the mean error was 11.7 mm corresponding to an angular error of 1.9°.

Conclusion

This in vitro study showed accurate acquisition of the centre of hip with a surgical navigation system. These data suggest that during TKA using this computer assisted navigation system, the accuracy of insertion will not be significantly affected by moderate pelvic movement during data acquisition.
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Metadata
Title
The effect of pelvic movement on the accuracy of hip centre location acquired using an imageless navigation system
Authors
Sebastien Lustig
Cyrille Fleury
Elvire Servien
Guillaume Demey
Philippe Neyret
Simon T. Donell
Publication date
01-11-2011
Publisher
Springer-Verlag
Published in
International Orthopaedics / Issue 11/2011
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-010-1194-2

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