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International Orthopaedics
Published in: International Orthopaedics 4/2004

01-08-2004 | Original Paper

The accuracy of free-hand cup positioning - a CT based measurement of cup placement in 105 total hip arthroplasties

Authors: G. Saxler, A. Marx, D. Vandevelde, U. Langlotz, M. Tannast, M. Wiese, U. Michaelis, G. Kemper, P. A. Grützner, R. Steffen, M. von Knoch, T. Holland-Letz, K. Bernsmann

Published in: International Orthopaedics | Issue 4/2004

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Abstract

We studied 105 patients who received a total hip arthroplasty between June 1985 and August 2001 using freehand positioning of the acetabular cup. Using pelvic CT scan and the hip-plan module of SurgiGATE-System (Medivision, Oberdorf, Switzerland), we measured the angles of inclination and anteversion of the cup. Mean inclination angle was 45.8°±10.1° (range: 23.0–71.5°) and mean anteversion angle was 27.3°±15.0° (range: −23.5° to 59.0°). We compared the results to the “safe” position as defined by Lewinnek et al. and found that only 27/105 cups were implanted within the limits of the safe position. We conclude that a safe position as defined by Lewinnek et al. [13] was only achieved in a minority of the cups that were implanted freehand.
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Metadata
Title
The accuracy of free-hand cup positioning - a CT based measurement of cup placement in 105 total hip arthroplasties
Authors
G. Saxler
A. Marx
D. Vandevelde
U. Langlotz
M. Tannast
M. Wiese
U. Michaelis
G. Kemper
P. A. Grützner
R. Steffen
M. von Knoch
T. Holland-Letz
K. Bernsmann
Publication date
01-08-2004
Publisher
Springer-Verlag
Published in
International Orthopaedics / Issue 4/2004
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-004-0542-5

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