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International Orthopaedics

Published in:

01-11-2012 | Original Paper

New method for measuring acetabular component positioning with EOS imaging: feasibility study on dry bone

Authors: Alexandre Journé, Jérome Sadaka, Claire Bélicourt, Alain Sautet

Published in: International Orthopaedics | Issue 11/2012

Abstract

Purpose

Malposition of the acetabular cup is the most common cause of total hip arthroplasty (THA) dislocation. The position of a total hip implant is usually analysed on computed tomography (CT) scan. We aim to prove it is possible to measure, with good accuracy, the position of an acetabular cup using the low-dose irradiation (EOS) imaging.

Material and methods

We implanted an acetabular cup in a pelvic dry bone and measured cup anteversion and inclination with scanography. We performed 14 series of EOS acquisitions with different inclination, rotation and pelvic tilt, which were analysed by five observers. Two observers repeated angle measurements. We then calculated measurement inter- and intrareproducibility and accuracy.

Results

Using a confidence interval (CI) of 95 %, inter- and intra-observer reproducibility were ±1.6, and ±1.4°, respectively, for cup inclination; accuracy in comparison with CT was ±2.6°. Using a 95 % CI, inter- and intra-observer reproducibility for cup anteversion were ±2.5° and ±2.3°, respectively. Measurement accuracy compared with CT was ±3.9°.

Conclusion

EOS imaging system is superior to standard radiography in terms of measuring acetabular anteversion and inclination.

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Title: New method for measuring acetabular component positioning with EOS imaging: feasibility study on dry bone
Authors: Alexandre Journé
Jérome Sadaka
Claire Bélicourt
Alain Sautet
Publication date: 01-11-2012
Publisher: Springer-Verlag
Published in: International Orthopaedics / Issue 11/2012
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-012-1650-2

Keynote webinar | Spotlight on medication adherence

Springer Medicine

New method for measuring acetabular component positioning with EOS imaging: feasibility study on dry bone

Abstract

Purpose

Material and methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Material and methods

Results

Conclusion

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